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  • 1. Abdo, A. A.
    et al.
    Ackermann, M.
    Ajello, M.
    Ampe, J.
    Anderson, B.
    Atwood, W. B.
    Axelsson, M.
    Bagagli, R.
    Baldini, L.
    Ballet, J.
    Barbiellini, G.
    Bartelt, J.
    Bastieri, D.
    Baughman, B. M.
    Bechtol, K.
    Bederede, D.
    Bellardi, F.
    Bellazzini, R.
    Belli, F.
    Berenji, B.
    Bisello, D.
    Bissaldi, E.
    Bloom, E. D.
    Bogaert, G.
    Bogart, J. R.
    Bonamente, E.
    Borgland, A. W.
    Bourgeois, P.
    Bouvier, A.
    Bregeon, J.
    Brez, A.
    Brigida, M.
    Bruel, P.
    Burnett, T. H.
    Busetto, G.
    Caliandro, G. A.
    Cameron, R. A.
    Campell, M.
    Caraveo, P. A.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Carlson, P.
    Casandjian, J. M.
    Cavazzuti, E.
    Ceccanti, M.
    Cecchi, C.
    Charles, E.
    Chekhtman, A.
    Cheung, C. C.
    Chiang, J.
    Chipaux, R.
    Cillis, A. N.
    Ciprini, S.
    Claus, R.
    Cohen-Tanugi, J.
    Condamoor, S.
    Conrad, J.
    Corbet, R.
    Cutini, S.
    Davis, D. S.
    DeKlotz, M.
    Dermer, C. D.
    de Angelis, A.
    de Palma, F.
    Digel, S. W.
    Dizon, P.
    Dormody, M.
    Silva, E. D. E.
    Drell, P. S.
    Dubois, R.
    Dumora, D.
    Edmonds, Y.
    Fabiani, D.
    Farnier, C.
    Favuzzi, C.
    Ferrara, E. C.
    Ferreira, O.
    Fewtrell, Z.
    Flath, D. L.
    Fleury, P.
    Focke, W. B.
    Fouts, K.
    Frailis, M.
    Freytag, D.
    Fukazawa, Y.
    Funk, S.
    Fusco, P.
    Garganov, F.
    Gasparrini, D.
    Gehrelscao, N.
    Germani, S.
    Giebels, B.
    Giglietto, N.
    Giordano, F.
    Glanzman, T.
    Godfrey, G.
    Goodman, J.
    Grenier, I. A.
    Grondin, M. H.
    Grove, J. E.
    Guillemot, L.
    Guiriec, S.
    Hakimi, M.
    Haller, G.
    Hanabata, Y.
    Hart, P. A.
    Hascall, P.
    Hays, E.
    Huffer, M.
    Hughes, R. E.
    Johannesson, G.
    Johnson, A. S.
    Johnson, R. P.
    Johnson, T. J.
    Johnson, W. N.
    Kamae, T.
    Katagiri, H.
    Kataoka, J.
    Kavelaars, A.
    Kelly, H.
    Kerr, M.
    Klamra, W.
    Knodlseder, J.
    Kocian, M. L.
    Kuehn, F.
    Kuss, M.
    Latronico, L.
    Lavalley, C.
    Leas, B.
    Lee, B.
    Lee, S. H.
    Lemoine-Goumard, M.
    Longo, F.
    Loparco, F.
    Lott, B.
    Lovellette, M. N.
    Lubrano, P.
    Lung, D. K.
    Madejski, G. M.
    Makeev, A.
    Marangelli, B.
    Marchetti, M.
    Massai, M. M.
    May, D.
    Mazzenga, G.
    Mazziotta, M. N.
    McEnery, J. E.
    McGlynn, S.
    Meurer, C.
    Michelson, P. F.
    Minuti, M.
    Mirizzi, N.
    Mitra, P.
    Mitthumsiri, W.
    Mizuno, T.
    Moiseev, A. A.
    Mongelli, M.
    Monte, C.
    Monzani, M. E.
    Moretti, E.
    Morselli, A.
    Moskalenko, I. V.
    Murgia, S.
    Nelson, D.
    Nilsson, L.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Nishino, S.
    Nolan, P. L.
    Nuss, E.
    Ohno, M.
    Ohsugi, T.
    Omodei, N.
    Orlando, E.
    Ormes, J. F.
    Ozaki, M.
    Paccagnella, A.
    Paneque, D.
    Panetta, J. H.
    Parent, D.
    Pelassa, V.
    Pepe, M.
    Pesce-Rollins, M.
    Picozza, P.
    Pinchera, M.
    Piron, F.
    Porter, T. A.
    Raino, S.
    Rando, R.
    Rapposelli, E.
    Raynor, W.
    Razzano, M.
    Reimer, A.
    Reimer, O.
    Reposeur, T.
    Reyes, L. C.
    Ritz, S.
    Robinson, S.
    Rochester, L. S.
    Rodriguez, A. Y.
    Romani, R. W.
    Roth, M.
    Ryde, F.
    Sacchetti, A.
    Sadrozinski, H. F. W.
    Saggini, N.
    Sanchez, D.
    Sander, A.
    Sapozhnikov, L.
    Saxton, O. H.
    Parkinson, P. M. S.
    Sellerholm, A.
    Sgro, C.
    Siskind, E. J.
    Smith, D. A.
    Smith, P. D.
    Spandre, G.
    Spinelli, P.
    Starck, J. L.
    Stephens, T. E.
    Strickman, M. S.
    Strong, A. W.
    Sugizaki, M.
    Suson, D. J.
    Tajima, H.
    Takahashi, H.
    Takahashi, T.
    Tanaka, T.
    Tenze, A.
    Thayer, J. B.
    Thayer, J. G.
    Thompson, D. J.
    Tibaldo, L.
    Tibolla, O.
    Torres, D. F.
    Tosti, G.
    Tramacere, A.
    Turri, M.
    Usher, T. L.
    Vilchez, N.
    Virmani, N.
    Vitale, V.
    Wai, L. L.
    Waite, A. P.
    Wang, P.
    Winer, B. L.
    Wood, D. L.
    Wood, K. S.
    Yasuda, H.
    Ylinen, T.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Ziegler, M.
    The on-orbit calibration of the Fermi Large Area Telescope2009In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 32, no 3-4, p. 193-219Article in journal (Refereed)
    Abstract [en]

    The Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope began its on-orbit operations on June 23, 2008. Calibrations, defined in a generic sense, correspond to synchronization of trigger signals, optimization of delays for latching data, determination of detector thresholds, gains and responses, evaluation of the perimeter of the South Atlantic Anomaly (SAA), measurements of live time, of absolute time, and internal and spacecraft boresight alignments. Here we describe on-orbit calibration results obtained using known astrophysical sources, galactic cosmic rays, and charge injection into the front-end electronics of each detector. Instrument response functions will be described in a separate publication. This paper demonstrates the stability of calibrations and describes minor changes observed since launch. These results have been used to calibrate the LAT datasets to be publicly released in August 2009. (C) 2009 Elsevier B.V. All rights reserved.

  • 2. Adiels, L.
    et al.
    Antonelli, A.
    Backenstoss, G.
    Beltrami, I.
    Bergstrom, I.
    Bloch, P.
    Burgun, G.
    Carius, Staffan
    Uppsala University.
    Chaldaras, M.
    Charalambous, S.
    Dedoussis, S.
    Derre, J.
    Dousse, J. C.
    Dris, M.
    Faure, J. L.
    Fetscher, W.
    Fry, J. R.
    Filokyprou, G.
    Gabathuler, E.
    Gamet, R.
    Garreta, D.
    Geralis, J.
    Gerber, H. J.
    Guyot, C.
    Hatzifotiadou, D.
    Hayman, P.
    Hugi, M.
    Kern, J.
    Kerek, A.
    Kesseler, G.
    Kochowski, C.
    Kokkinias, P.
    Kostarakis, L.
    Kuzminski, J.
    Lefas, C.
    Lindblad, T.
    Mall, U.
    Marel, G.
    Mason, P.
    Milsztajn, A.
    Nakada, T.
    Nilsson, A.
    Papdopoulos, L.
    Pavlopoulos, P.
    Pauli, E.
    Rickenbach, R.
    Schaller, L.
    Schopper, A.
    Tauscher, L.
    Troster, D. A.
    Tzamouramis, J.
    Watson, E.
    Zevgolatakos, S.
    Study Of Cp Violation In A Tagged Neutral Kaon Beam1986In: The Quark Structure of Matter: proceedings / [ed] M. Jacob and K. Winter, 1986, p. 495-507Conference paper (Refereed)
  • 3. Adiels, L.
    et al.
    Backenstoss, G.
    Bergstrom, I.
    Carius, Staffan
    Charalambous, S.
    Cooper, M.
    Findeisen, C.
    Fransson, K.
    Hadjifotiadou, D.
    Kerek, A.
    Papastefanou, K.
    Pavlopoulos, P.
    Repond, J.
    Tauscher, L.
    Troster, D.
    Williams, C.
    Zioutas, K.
    Pennington, M. R.
    Investigations on baryonium and other rare pmacrp annihilation modes using high resolution pi0 spectrometers (PS 182)1985In: Antiproton 1984. Proceedings of the VII European Symposium on Antiproton Interactions, Institution of Electrical Engineers (IEE), 1985, p. 297-304Conference paper (Refereed)
    Abstract [en]

    In the search for heavy, narrow exotic states such as baryonium or glueballs, carried out so far, various methods of high- and low-energy production, low-energy formation, and e+e- reactions were used. In particular, a search for baryonium states below threshold (mxlsimmppmacr) has shown some evidence [Richter et al., 1983, Brando et al., 1984] for a few states. However, the results of these measurements suffer from poor statistics. Among the possible methods which can be applied in the baryonium bound state research at LEAR, the authors consider the study of the reaction ppmacrrarrX+pi0 as the most promising. They have performed an experiment to study this reaction by means of an experimental set-up especially tailored for measuring monoenergetic pi0,s, allowing for both angular distribution measurements and high-resolution spectroscopy. They report on the preliminary results from our actual measurements of the inclusive pi0 and eta spectra following the antiproton annihilation at rest.

  • 4. Adiels, L.
    et al.
    Backenstoss, G.
    Bergstrom, I.
    Carius, Staffan
    Uppsala University.
    Charalambous, S.
    Cooper, M.
    Findeisen, C.
    Hatzifotiadou, D.
    Kerek, A.
    Kuzminski, J.
    Pavlopoulos, P.
    Repond, J.
    Tauscher, L.
    Troster, D. A.
    Williams, C.
    Zioutas, K.
    Pi0 And Eta Spectroscopy At Lear1986In: Tignes 1985, Proceedings, Physics With Antiprotons At Lear In The Acol Era, 1986, p. 359-359Conference paper (Refereed)
  • 5. Adiels, L.
    et al.
    Backenstoss, G.
    Bergström, I.
    Carius, Staffan
    Research Institute of Physics, Stockholm.
    Charalambous, S.
    Cooper, M. D.
    Findeisen, C.
    Hatzifotiadou, D.
    Kerek, A.
    Papastefanou, K.
    Pavlopoulos, P.
    Repond, J.
    Tauscher, L.
    Tröster, D.
    Williams, M. C. S.
    Zioutas, K.
    A π0 and η spectrometer of lead glass and BGO for momenta up to 1 GeV/c1986In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 244, no 3, p. 380-390Article in journal (Refereed)
    Abstract [en]

    A spectrometer consisting of two sets of bismuth germanium oxide (BGO) crystals and a lead-glass array has been used to measure the π0 and η momentum spectra produced from proton-antiproton annihilations at rest. We describe the test of the BGO sets in electron beams of energies from 50 to 450 MeV. We discuss the method of construction and calibration of the lead-glass array, as well as procedures to extract the energy and position resolutions for detected photons. A momentum resolution (σ) for π0's and η's of 4% and 3%, respectively has been achieved at momenta below 1 GeV/c. © 1986.

  • 6. Adiels, L.
    et al.
    Backenstoss, G.
    Bergström, I.
    Carius, Staffan
    Research Institute of Physics, Stockholm.
    Charalambous, S.
    Cooper, M. D.
    Findeisen, Ch.
    Hatzifotiadou, D.
    Hugi, M.
    Kerek, A.
    Meyer, H. O.
    Pavlopoulos, P.
    Repond, J.
    Tauscher, L.
    Troester, D.
    Williams, M. C. S.
    Zioutas, K.
    Experimental study of the inclusive η-spectrum from p {Mathematical expression} annihilations at rest in liquid hydrogen1989In: Zeitschrift für Physik C Particles and Fields, ISSN 0170-9739, E-ISSN 1431-5858, Vol. 42, no 1, p. 49-58Article in journal (Refereed)
    Abstract [en]

    The inclusive η-momentum spectrum from {Mathematical expression} annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for {Mathematical expression}, and ηη(8.1±3.1)×10 -5. An upper limit for {Mathematical expression} of 1.8×10 -4 at 95% CL was found. The ratio of the branching ratios is BR(ηρ{variant})/BR(ηω)=0.51 -0.06 +0.20. For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηπ 0)/BR(π 0π 0)=0.65±0.14, BR(ηη)/BR(π 0π 0), BR(ηη ′)/BR(π 0π 0) at 95% CL, and BR(ηη)/BR(ηπ 0). © 1989 Springer-Verlag.

  • 7. Adiels, L.
    et al.
    Backenstoss, G.
    Bergström, I.
    Carius, Staffan
    Research Institute of Physics, Stockholm.
    Charalambous, S.
    Cooper, M. D.
    Findeisen, Ch.
    Hatzifotiadou, D.
    Hugi, M.
    Kerek, A.
    Meyer, H. O.
    Pavlopoulos, P.
    Repond, J.
    Tauscher, L.
    Tröster, D.
    Williams, M. C. S.
    Zioutas, K.
    Experimental determination of the branching ratios {Mathematical expression}, and 2γ at rest1987In: Zeitschrift für Physik C Particles and Fields, ISSN 0170-9739, E-ISSN 1431-5858, Vol. 35, no 1, p. 15-19Article in journal (Refereed)
    Abstract [en]

    The branching ratios of {Mathematical expression} annihilations into the neutral final states 2π 0, π 0γ, and 2γ are measured by stopping antiprotons in liquid hydrogen. They are {Mathematical expression}, {Mathematical expression}, and B γγ<1.7×10 -6 (95% c.l.).

  • 8. Adiels, L.
    et al.
    Backenstoss, G.
    Bergström, I.
    Carius, Staffan
    Research Institute of Physics, Stockholm.
    Charalambous, S.
    Cooper, M. D.
    Findeisen, Ch.
    Hatzifotiadou, D.
    Kerek, A.
    Pavlopoulos, P.
    Repond, J.
    Tauscher, L.
    Tröster, D.
    Williams, M. C. S.
    Zioutas, K.
    Search for narrow signals in the γ-spectrum from pp̄ annihilation at rest1986In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 182, no 3-4, p. 405-408Article in journal (Refereed)
    Abstract [en]

    The γ-spectrum originating from pp̄ annihilations at rest in liquid hydrogen was measured with two BGO spectrometers. A total of 24 × 10 6 γ's were accumulated. No narrow peaks indicating exotic states such as baryonium were observed. The upper limit for the branching ratio p p ̄ → γ + X with 1040 ≤ m x ≤ 1770 MeV/c 2 and with λ x ≤ 25 MeV/c 2 is less than 10 -3 with more than 99.96% confidence. © 1986.

  • 9. Ahrens, J.
    et al.
    Ackermann, M.
    Andres, E.
    Bai, X.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bernardini, E.
    Bertrand, D.
    Binon, F.
    Biron, A.
    Boersma, D. J.
    Böser, S.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Dickinson, E.
    Ekström, P.
    Engel, R.
    Evenson, P.
    Feser, T.
    Gaisser, T. K.
    Ganugapati, R.
    Gaug, M.
    Geenen, H.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hinton, J. A.
    Hubert, D.
    Hughey, B.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Köpke, L.
    Kowalski, M.
    Kuehn, K.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Lloyd-Evans, J.
    Madsen, J.
    Mandli, K.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Messarius, T.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Nahnhauer, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, P.
    Pérez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rochester, K.
    Rodríguez Martino, J.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schinarakis, K.
    Schlenstedt, S.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Stanev, T.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sulanke, K. -H
    Taboada, I.
    Tilav, S.
    Walck, C.
    Wagner, W.
    Wang, Y. -R
    Watson, A. A.
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Measurement of the cosmic ray composition at the knee with the SPASE-2/AMANDA-B10 detectors2004In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 21, no 6, p. 565-581Article in journal (Refereed)
    Abstract [en]

    The mass composition of high-energy cosmic rays at energies above 1015 eV can provide crucial information for the understanding of their origin. Air showers were measured simultaneously with the SPASE-2 air shower array and the AMANDA-B10 Cherenkov telescope at the South Pole. This combination has the advantage to sample almost all high-energy shower muons and is thus a new approach to the determination of the cosmic ray composition. The change in the cosmic ray mass composition was measured versus existing data from direct measurements at low energies. Our data show an increase of the mean log atomic mass 〈lnA〉 by about 0.8 between 500 TeV and 5 PeV. This trend of an increasing mass through the "knee" region is robust against a variety of systematic effects. © 2004 Elsevier B.V. All rights reserved.

  • 10. Ahrens, J.
    et al.
    Andrés, E.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bertrand, D.
    Binon, F.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dalberg, E.
    de Clercq, C.
    de Young, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Feser, T.
    Frère, J. -M
    Gaisser, T. K.
    Gaug, M.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Heukenkamp, H.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D. M.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, Ph.
    Pérez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sudhoff, P.
    Sulanke, K. -H
    Taboada, I.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wiedeman, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Observation of high energy atmospheric neutrinos with the Antarctic muon and neutrino detector array2002In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 66, no 1, p. 120051-1200520Article in journal (Refereed)
    Abstract [en]

    The Antarctic muon and neutrino detector array (AMANDA) began collecting data with ten strings in 1997. Results from the first year of operation are presented. Neutrinos coming through the Earth from the Northern Hemisphere are identified by secondary muons moving upward through the array. Cosmic rays in the atmosphere generate a background of downward moving muons, which are about 106 times more abundant than the upward moving muons. Over 130 days of exposure, we observed a total of about 300 neutrino events. In the same period, a background of 1.05 × 109 cosmic ray muon events was recorded. The observed neutrino flux is consistent with atmospheric neutrino predictions. Monte Carlo simulations indicate that 90% of these events lie in the energy range 66 GeV to 3.4 TeV. The observation of atmospheric neutrinos consistent with expectations establishes AMANDA-B10 as a working neutrino telescope.

  • 11. Ahrens, J.
    et al.
    Andrés, E.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bertrand, D.
    Biron, A.
    Botner, O.
    Bouchta, A.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dalberg, E.
    De Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Gaug, M.
    Gerhardt, L.
    Goldschmidt, A.
    Goobar, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Loaiza, P.
    Lowder, D. M.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Olbrechts, Ph.
    Pérez De Los Heros, C.
    Pohl, A.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schneider, E.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sudhoff, P.
    Sulanke, K. H.
    Taboada, I.
    Thollander, L.
    Thon, T.
    Limits to the muon flux from WIMP annihilation in the center of the Earth with the AMANDA detector2002In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 66, no 3, p. 032006-Article in journal (Refereed)
    Abstract [en]

    A search for nearly vertical up-going muon-neutrinos from neutralino annihilations in the center of the Earth has been performed with the AMANDA-B10 neutrino detector. The data collected in 130.1 days of live time in 1997, ∼10 9 events, have been analyzed for this search. No excess over the expected atmospheric neutrino background has been observed. An upper limit at 90% confidence level has been obtained on the annihilation rate of neutralinos in the center of the Earth, as well as the corresponding muon flux limit, both as a function of the neutralino mass in the range 100 GeV-5000 GeV. © 2002 The American Physical Society.

  • 12. Ahrens, J.
    et al.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bertrand, D.
    Binon, F.
    Biron, A.
    Boeser, S.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Gaug, M.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Köpke, L.
    Kowalski, M.
    Kuehn, K.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Madsen, J.
    Marciniewski, P.
    Matis, H.
    McParland, C. P.
    Miller, T. C.
    Minaeva, Y.
    Miocinoví, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, P.
    Pérez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sulanke, K. -H
    Taboada, I.
    Thollander, L.
    Tilav, S.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Search for point sources of high-energy neutrinos with AMANDA2003In: Astrophysical Journal Letters, ISSN 2041-8205, Vol. 583, no 2 I, p. 1040-1057Article in journal (Refereed)
    Abstract [en]

    This paper describes the search for astronomical sources of high-energy neutrinos using the AMANDA-B10 detector, an array of 302 photomultiplier tubes used for the detection of Cerenkov light from upward-traveling neutrino-induced muons, buried deep in ice at the South Pole. The absolute pointing accuracy and angular resolution were studied by using coincident events between the AMANDA detector and two independent telescopes on the surface, the GASP air Cerenkov telescope and the SPASE extensive air shower array. Using data collected from 1997 April to October (130.1 days of live time), a general survey of the northern hemisphere revealed no statistically significant excess of events from any direction. The sensitivity for a flux of muon neutrinos is based on the effective detection area for through-going muons. Averaged over the northern sky, the effective detection area exceeds 10,000 m2 for E μ ≈ 10 TeV. Neutrinos generated in the atmosphere by cosmic-ray interactions were used to verify the predicted performance of the detector. For a source with a differential energy spectrum proportional to Eν -2 and declination larger than +40°, we obtain E2(dNν/dE) ≤ 10-6 GeV cm-2 s-1 for an energy threshold of 10 GeV.

  • 13. Ahrens, J.
    et al.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bertrand, D.
    Binon, F.
    Biron, A.
    Böser, S.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Boyce, M. M.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Davour, A.
    De Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Ekström, P.
    Feser, T.
    Frère, J. -M
    Gaisser, T. K.
    Gaug, M.
    Geenen, H.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Hill, G. C.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Lowder, D. M.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Messarius, T.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Olbrechts, Ph.
    De Los Heros, C. P.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Reed, C.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Martino, J. R.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schinarakis, K.
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Search for neutrino-induced cascades with the AMANDA detector2003In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 67, no 1, p. 012003-Article in journal (Refereed)
    Abstract [en]

    We report on a search for electromagnetic and/or hadronic showers (cascades) induced by a diffuse flux of neutrinos with energies between 5 TeV and 300 TeV from extraterrestrial sources. Cascades may be produced by matter interactions of all flavors of neutrinos, and contained cascades have better energy resolution and afford better background rejection than throughgoing νμ-induced muons. Data taken in 1997 with the AMANDA detector were searched for events with a high-energy cascadelike signature. The observed events are consistent with expected backgrounds from atmospheric neutrinos and catastrophic energy losses from atmospheric muons. Effective volumes for all flavors of neutrinos, which allow the calculation of limits for any neutrino flux model, are presented. The limit on cascades from a diffuse flux of νe+ νμ + ντ+ ν̄e + ν̄μ+ ν̄τ is E2(dΦ/dE)<9.8×10-6 GeV cm-2 s-1 sr-1, assuming a neutrino flavor flux ratio of 1:1:1 at the detector. The limit on cascades from a diffuse flux of νe+ν̄e is E2(dΦ/dE)<6. 5×10-6 GeV cm-2 s-1 sr-1, independent of the assumed neutrino flavor flux ratio. © 2003 The American Physical Society.

  • 14. Ahrens, J.
    et al.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. H.
    Bertrand, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dalberg, E.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. P.
    Doksus, P.
    Edsjo, J.
    Ekstrom, P.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hellwig, M.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Kopke, M.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, P.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Loaiza, P.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Miller, T. C.
    Minaeva, Y.
    Miocinovic, P.
    Morse, R.
    Neuhoffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Perez de los Heros, C.
    Pohl, A.
    University of Kalmar, Department of Technology.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Richter, S.
    Rodriguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. G.
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G.
    Spiering, C.
    Starinski, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sudhoff, P.
    Taboada, I.
    Thollander, L.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Initial results from AMANDA2001In: 21st Rencontres de Moriond Workshop on Very High-Energy Phenomena in the Universe, 2001Conference paper (Refereed)
  • 15. Ahrens, J.
    et al.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bertrand, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dalberg, E.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hellwig, M.
    Heukenkamp, H.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D. M.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Pérez de los Heros, C.
    Porrata, R.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Richter, S.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sudhoff, P.
    Taboada, I.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Search for supernova neutrino bursts with the AMANDA detector2001In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 16, no 4, p. 345-359Article in journal (Refereed)
    Abstract [en]

    The core collapse of a massive star in the Milky Way will produce a neutrino burst, intense enough to be detected by existing underground detectors. The AMANDA neutrino telescope located deep in the South Pole ice can detect MeV neutrinos by a collective rate increase in all photo-multipliers on top of dark noise. The main source of light comes from positrons produced in the CC reaction of anti-electron neutrinos on free protons ve + p → e+ + n. This paper describes the first supernova search performed on the full sets of data taken during 1997 and 1998 (215 days of live time) with 302 of the detector's optical modules. No candidate events resulted from this search. The performance of the detector is calculated, yielding a 70% coverage of the galaxy with one background fake per year with 90% efficiency for the detector configuration under study. An upper limit at the 90% c.l. on the rate of stellar collapses in the Milky Way is derived, yielding 4.3 events per year. A trigger algorithm is presented and its performance estimated. Possible improvements of the detector hardware are reviewed.

  • 16. Ahrens, J.
    et al.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. H.
    Bertrand, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Chen, A.
    Chirkin, D.
    Conrad, Jan
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    De Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. P.
    Doksus, P.
    Edsjo, J.
    Ekstrom, P.
    Feser, T.
    Gaisser, S.
    Gaug, M.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Kopke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Minaeva, Y.
    Miocinovic, P.
    Morse, R.
    Neunhoffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Olbrechts, P.
    Peres de los Heros, C.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Ribordy, M.
    Rhode, W.
    Richter, S.
    Rodriguez Martino, J.
    Ross, D.
    Sander, H. G.
    Schmidt, T.
    Schneider, D.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sudhoff, P.
    Sulanke, K. H.
    Taboada, I.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Yodh, G.
    Young, S.
    Results from AMANDA2001In: Proceedings, 9th International Workshop, Venice, Italy, March 6-9, 2001. Vol. 1, 2: Neutrino telescopes / [ed] M. Baldo-Ceolin, 2001, p. 569-580Conference paper (Refereed)
  • 17. Ahrens, J.
    et al.
    Bai, X.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bernardini, E.
    Bertrand, D.
    Binon, F.
    Biron, A.
    Böser, S.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    DeYoung, T.
    Desiati, P.
    Doksus, P.
    Ekström, P.
    Engel, R.
    Evenson, P.
    Feser, T.
    Gaisser, T. K.
    Ganugapati, R.
    Gaug, M.
    Geenen, H.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hinton, J. A.
    Hughey, B.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Köpke, L.
    Kowalski, M.
    Kuehn, K.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    Liubarsky, I.
    Lloyd-Evans, J.
    Madsen, J.
    Mandli, K.
    Marciniewski, P.
    Martello, D.
    Matis, H. S.
    McParland, C. P.
    Messarius, T.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, P.
    Perez de los Heros, C.
    Pohl, A. C.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rochester, K.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schinarakis, K.
    Schlenstedt, S.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Splczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Stanev, T.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sulanke, K. -H
    Taboada, I.
    Tilav, S.
    Walck, C.
    Wagner, W.
    Wang, Y. -R
    Watson, A. A.
    Weinheimer, C.
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Calibration and survey of AMANDA with the SPASE detectors2004In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 522, no 3, p. 347-359Article in journal (Refereed)
    Abstract [en]

    We report on the analysis of air showers observed in coincidence by the Antarctic Muon and Neutrino detector array (AMANDA-B10) and the South Pole Air Shower Experiment (SPASE-1 and SPASE-2). We discuss the use of coincident events for calibration and survey of the deep AMANDA detector as well as the response of AMANDA to muon bundles. This analysis uses data taken during 1997 when both SPASE-1 and SPASE-2 were in operation to provide a stereo view of AMANDA. © 2003 Elsevier B.V. All rights reserved.

  • 18. Ahrens, J.
    et al.
    Bai, X.
    Barwick, S. W.
    Bay, R. C.
    Becka, T.
    Becker, K. -H
    Bernardini, E.
    Bertrand, D.
    Biron, A.
    Boeser, S.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    DeYoung, T.
    Desiati, P.
    Doksus, P.
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Ganugapati, R.
    Gaug, M.
    Geenen, H.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hulth, P. O.
    Hughey, B.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kuehn, K.
    Kim, J.
    Köpke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Madsen, J.
    Mandli, K.
    Marciniewski, P.
    Matis, H.
    McParland, C. P.
    Messarius, T.
    Miller, T. C.
    Minaeva, Y.
    Miocinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, P.
    Pérez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Sander, H. -G
    Schlenstedt, S.
    Schinarakis, K.
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Stamatikos, M.
    Spiczak, G. M.
    Spiering, C.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sulanke, K. -H
    Taboada, I.
    Tilav, S.
    Wagner, W.
    Walck, C.
    Wang, Y. -R
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Limits on diffuse fluxes of high energy extraterrestrial neutrinos with the AMANDA-B10 detector2003In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 90, no 25, p. 2511011-2511015Article in journal (Refereed)
    Abstract [en]

    A report on the limits, which could be placed on diffuse fluxes of high energy extraterrestrial neutrinos, was presented. The incorporation of neutrino oscillations was necessary for interpreting the limits in terms of the flux from a cosmological distributions of sources. The energetic accelerated environments were presented as the sources of high energy extraterrestrial neutrinos.

  • 19. Ahrens, J.
    et al.
    Bai, X.
    Barwick, S. W.
    Becka, T.
    Becker, J. K.
    Bernardini, E.
    Bertrand, D.
    Binon, F.
    Biron, A.
    Boersma, D. J.
    Böser, S.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chen, A.
    Chirkin, D.
    Collin, B.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. P.
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Ganugapati, R.
    Gaug, M.
    Geenen, H.
    Gerhardt, L.
    Goldschmidt, A.
    Groß, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Harenberg, T.
    Hauschildt, T.
    Helbing, K.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hubert, D.
    Hughey, B.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kestel, M.
    Köpke, L.
    Kowalski, M.
    Kuehn, K.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Madsen, J.
    Mandli, K.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Messarius, T.
    Minaeva, Y.
    Miočinović, P.
    Morse, R.
    Münich, K.
    Nahnhauer, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, P.
    Perez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Sander, H. G.
    Schinarakis, K.
    Schlenstedt, S.
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Stamatikos, M.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sulanke, K. H.
    Taboada, I.
    Thollander, L.
    Tilav, S.
    Wagner, W.
    Walck, C.
    Wang, Y. R.
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Yodh, G.
    Search for Extraterrestrial Point Sources of Neutrinos with AMANDA-II2004In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 92, no 7, p. 711021-711025Article in journal (Refereed)
    Abstract [en]

    The results of a search for point sources of high energy neutrinos in the northern hemisphere were presented using AMANDA-II data collected in the year 2000. The results included the flux limits on several active-galactic-nuclei blazars, microquasars, magnetars, and other candidate neutrino sources. A search for excesses above a random background of cosmic ray induced atmospheric neutrinos and misreconstructed downgoing cosmic-rays muons, which revealed no statistically significant neutrino point sources was also presented. It was shown that AMANDA-II had achieved the sensitivity required to probe known TeV γ-ray sources such as the blazar Markarian 501 in its 1997 flaring state at a level where neutrino and γ-ray fluxes were equal.

  • 20. Ahrens, J.
    et al.
    Bai, X.
    Barwick, S. W.
    Becka, T.
    Becker, K. -H
    Bernardini, E.
    Bertrand, D.
    Binon, F.
    Biron, A.
    Böser, S.
    Botner, O.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    De Clercq, C.
    De Young, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Gaug, M.
    Gerhardt, L.
    Godschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobson, J.
    Karle, A.
    Koci, B.
    Köpke, L.
    Kuehn, P.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Minaeva, Y.
    Miočinovć, P.
    Morse, R.
    Nahnhauer, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Olbrechts, Ph.
    Péres de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sudhoff, P.
    Sulanke, K. -H
    Taboada, I.
    Thollander, L.
    Tilay, S.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wiedemann, C.
    Wissing, H.
    Results from the Antarctic muon and nuetrino detector array2003In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 118, p. 371-379Article in journal (Refereed)
    Abstract [en]

    We show new results from both the older and newer incarnations of AMANDA (AMANDA-B10 and AMANDA-II, respectively). These results demonstrate that AMANDA is a functioning, multipurpose detector with significant physics and astrophysics reach. They include a new higher-statistics measurement of the atmospheric muon neutrino flux and preliminary results from searches for a variety of sources of ultrahigh energy neutrinos: generic point sources, gamma-ray bursters and diffuse sources producing muons in the detector, and diffuse sources producing electromagnetic or hadronic showers in or near the detector.

  • 21. Ahrens, J.
    et al.
    Bai, X.
    Barwick, S. W.
    Becka, T.
    Becker, K. -H
    Bernardini, E.
    Bertrand, D.
    Binon, F.
    Biron, A.
    Böser, S.
    Botner, O.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    de Young, T.
    Desiati, P.
    Dewulf, J. -P
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Ganupati, R.
    Gaug, M.
    Geenen, H.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Köpke, L.
    Kuehn, K.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubaxsky, I.
    Madsen, J.
    Mandli, K.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Messarius, T.
    Minaeva, Y.
    Miočinović, P.
    Morse, R.
    Nahnhauer, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Olbrechts, P.
    Pérez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schinarakis, K.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sudoff, P.
    Sulanke, K. -H
    Taboada, I.
    Thollander, L.
    Tilav, S.
    Wagner, W.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Yodh, G.
    Young, S.
    Results from the AMANDA telescope2003In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 721, p. C545-C548Article in journal (Refereed)
    Abstract [en]

    We present results from the AMANDA high energy neutrino telescope located at the South Pole. They include measurements of the atmospheric neutrino flux, search for UHE point sources, and diffuse sources producing electromagnetic/hadronic showers at the detector or close to it.

  • 22. Ahrens, J.
    et al.
    Bai, X.
    Barwick, S. W.
    Becka, T.
    Becker, K. -H
    Bertrand, D.
    Binon, F.
    Biron, A.
    Böser, S.
    Botner, O.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    de Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Ekström, P.
    Feser, T.
    Gaisser, T. K.
    Gaug, M.
    Gerhardt, L.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hauschildt, T.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Köpke, L.
    Kowalski, M.
    Kuehn, K.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Minaeva, Y.
    Miočinović, P.
    Morse, R.
    Nahnhauer, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Olbrechts, P.
    Pérez de los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Rodríguez Martino, J.
    Ross, D.
    Sander, H. -G
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Sudhoff, P.
    Sulanke, K. -H
    Taboada, I.
    Thollander, L.
    Tilav, S.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wiedemann, C.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Yodh, G.
    Young, S.
    Physics and operation of the AMANDA-II high energy neutrino telescope2002In: Proceedings of the SPIE - The International Society for Optical Engineering 2003, Institution of Electrical Engineers (IEE), 2002, p. 79-91Conference paper (Refereed)
    Abstract [en]

    This paper briefly describes the principle of operation and science goals of the AMANDA high energy neutrino telescope located at the South Pole, Antarctica. Results from an earlier phase of the telescope, called AMANDA-B10, demonstrate both reliable operation and the broad astrophysical reach of this device, which includes searches for a variety of sources of ultrahigh energy neutrinos: generic point sources, Gamma-Ray Bursts and diffuse sources. The predicted sensitivity and angular resolution of the telescope were confirmed by studies of atmospheric muon and neutrino backgrounds. We also report on the status of the analysis from AMANDA-II, a larger version with far greater capabilities. At this stage of analysis, details of the ice properties and other systematic uncertainties of the AMANDA-II telescope are under study, but we have made progress toward critical science objectives. In particular, we focus on the search for continuous emission from astrophysical point sources and the search for correlated neutrino emission from Gamma Ray Bursts detected by BATSE before decommissioning in May 2000. During the next two years, we expect to exploit the full potential of AMANDA-II with the installation of a new data acquisition system that records full waveforms from the in-ice optical sensors.

  • 23. Ahrens, J.
    et al.
    Bai, X.
    Bay, R.
    Barwick, S. W.
    Becka, T.
    Becker, J. K.
    Becker, K. -H
    Bernardini, E.
    Bertrand, D.
    Biron, A.
    Boersma, D. J.
    Böser, S.
    Botner, O.
    Bouchta, A.
    Bouhali, O.
    Burgess, T.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Castermans, T.
    Chirkin, D.
    Collin, B.
    Conrad, J.
    Cooley, J.
    Cowen, D. F.
    Davour, A.
    De Clercq, C.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Ekström, P.
    Feser, T.
    Gaug, M.
    Gaisser, T. K.
    Ganugapati, R.
    Geenen, H.
    Gerhardt, L.
    Groß, A.
    Goldschmidt, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Harenberg, T.
    Hauschildt, T.
    Helbing, K.
    Hellwig, M.
    Herquet, P.
    Hill, G. C.
    Hubert, D.
    Hughey, B.
    Hulth, P. O.
    Hultqvist, K.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kestel, M.
    Köpke, L.
    Kowalski, M.
    Kuehn, K.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    McParland, C. P.
    Messarius, T.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Münich, K. S.
    Nam, J.
    Nahnhauer, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Olbrechts, Ph.
    Pérez De Los Heros, C.
    Pohl, A. C.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Porrata, R.
    Price, P. B.
    Przybylski, G. T.
    Rawlins, K.
    Resconi, E.
    Rhode, W.
    Ribordy, M.
    Richter, S.
    Martino, J. R.
    Ross, D.
    Sander, H. -G
    Schinarakis, K.
    Schlenstedt, S.
    Schmidt, T.
    Schneider, D.
    Wiebusch, C. H.
    Muon track reconstruction and data selection techniques in AMANDA2004In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 524, no 1-3, p. 169-194Article in journal (Refereed)
    Abstract [en]

    The Antarctic Muon And Neutrino Detector Array (AMANDA) is a high-energy neutrino telescope operating at the geographic South Pole. It is a lattice of photo-multiplier tubes buried deep in the polar ice between 1500 and 2000 m. The primary goal of this detector is to discover astrophysical sources of high-energy neutrinos. A high-energy muon neutrino coming through the earth from the Northern Hemisphere can be identified by the secondary muon moving upward through the detector. The muon tracks are reconstructed with a maximum likelihood method. It models the arrival times and amplitudes of Cherenkov photons registered by the photo-multipliers. This paper describes the different methods of reconstruction, which have been successfully implemented within AMANDA. Strategies for optimizing the reconstruction performance and rejecting background are presented. For a typical analysis procedure the direction of tracks are reconstructed with about 2° accuracy. © 2004 Elsevier B.V. All rights reserved.

  • 24. Akimov, D.
    et al.
    Bergstrom, L.
    Bilger, R.
    Bogoslavsky, D.
    Bolozdynya, A.
    Bondar, A.
    Calen, H.
    Carius, Staffan
    Uppsala University.
    Clement, H.
    Chernyshev, B.
    Chilingarov, A.
    Chuvilo, I.
    Dahlgren, S.
    Dunin, V.
    Ekstrom, Curt
    Fransson, K.
    Gornov, M.
    Gurov, Yu
    Gustafsson, L.
    Hirabyashi, H.
    Haggstrom, S.
    Hoistad, B.
    Ikegami, H.
    Jansson, A.
    Johansson, A.
    Kilian, K.
    Kolachev, G.
    Komogorova, L.
    Kondratyuk, L.
    Kullander, S.
    Kupsc, A.
    Kuzmin, A.
    Kuznetsov, A.
    Martemyanev, A.
    Mizuno, Y.
    Morosov, B.
    Mohn, J.
    Mortsell, A.
    Nawrot, A.
    Oelert, W.
    Pawlowski, Z.
    Povtoreiko, A.
    Purlatz, T.
    Reistad, D.
    Ruber, R.
    Rubinstein, H.
    Sandukovsky, S.
    Schuberth, U.
    Sefzick, T.
    Shafigullin, M.
    Shimizu, H.
    Shwartz, B.
    Sibirtsev, A.
    Sidrov, V.
    Sopov, V.
    Stepanaik, J.
    Sukhanov, A.
    Sukhanov, A.
    Chernyshev, V.
    Tikhomirov, V.
    Turowiecky, A.
    Trostell, B.
    Waters, M.
    Wilhelmi, Z.
    Yamamoto, A.
    Zabierowski, J.
    Zernov, A.
    Zlomanczuk, J.
    Physics with WASA and PROMICE1994In: Physics with GeV-particle beams, Juelich 1994, 1994, p. 519-530Conference paper (Refereed)
  • 25. Amann, F.
    et al.
    Black, K.
    Bolton, R. D.
    Carius, Staffan
    Cooper, M. D.
    Foreman, W.
    Hansen, C.
    Harrison, R.
    Hart, G.
    Hart, V.
    Hoffman, C. M.
    Hoffman, N.
    Hunter, T.
    Hogan, G. E.
    June, N.
    Kercher, D.
    Little, J.
    Kozlowski, T.
    Mischke, R. E.
    Naivar, F. J.
    Novak, J.
    Oothoudt, M. A.
    Pillai, C.
    Schilling, S.
    Smith, W.
    Stanislaus, S.
    Sturrock, J.
    Szymanski, J.
    Van Dyke, J.
    Werbeck, R. D.
    Whitehouse, D.
    Wilkinson, C.
    Crocker, J.
    Wright, S. C.
    Cooper, P. S.
    Dzemidzic, M.
    Flick, J.
    Hungerford, E. V. , I I I
    Johnston, K.
    Lan, K.
    Mayes, B. W. , I I
    Phelps, R.
    Pinsky, L.
    von Witsch, W.
    Hallin, A.
    Hughes, E. B.
    Jui, C.
    Otis, J. N.
    Ritter, M. W.
    Gagliardi, C.
    Kim, G.
    Liu, F.
    Tribble, R. E.
    Van Ausdeln, L.
    Barlow, D.
    Kessler, R.
    Nefkens, B. M. K.
    Price, J.
    Tippens, B.
    Fisk, R. J.
    Koetke, D. D.
    Manweiler, R.
    Marshall, R.
    Stephens, W.
    Ziock, K. O. H.
    Piilonen, L. E.
    Kunselman, A. R.
    Hahn, K.
    Markey, J. K.
    Phua, K. K.
    Yamaguchi, Y.
    A search for murarregamma at the level of 10-131991In: Proceedings of the 25th International Conference on High Energy Physics, 1991, p. 1070-1071Conference paper (Refereed)
    Abstract [en]

    The MEGA experiment, which is a search for the decay murarregamma with a branching ratio sensitivity of about 10-13, employs highly modular, fast detectors, state-of-the-art electronics, and a staged trigger with on-line filters. The detectors are contained in a 1.5-T solenoidal field produced by a superconducting magnet. Positrons are confined to the central region and are measured by a set of thin MWPCs. Photons are measured by one of four layers of pair spectrometers in the outer region. Most aspects of the design have been validated in engineering runs; data taking will begin in 1990 with much of the electron arm and one pair spectrometer layer installed.

  • 26.
    Anderson, Helén
    et al.
    Linnaeus University, School of Business and Economics, Department of Marketing.
    Carius, Staffan
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Läraranställning och anställningsordning vid Linnéuniversitetet: Förslag för förnyelse2019Report (Other (popular science, discussion, etc.))
  • 27. Andres, E.
    et al.
    Askebjer, P.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becker, K. H.
    Bergstrom, L.
    Bertrand, D.
    Bierenbaum, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dailing, J.
    Dalberg, E.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. P.
    Doksus, P.
    Edsjo, J.
    Ekstrom, P.
    Erlandsson, B.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Goobar, A.
    Gray, L.
    Haase, H.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    He, Y. D.
    Hellwig, M.
    Heukenkamp, H.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Kim, J.
    Koci, B.
    Kopke, L.
    Kowalski, M.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D. M.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Mihalyi, A.
    Mikolajski, T.
    Miller, T. C.
    Minaeva, Y.
    Miocinovic, P.
    Mock, P. C.
    Morse, R.
    Neunhoffer, T.
    Newcomer, F. M.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Peres de los Heros, C. P. D. L.
    Porrata, R.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Richards, A.
    Richter, S.
    Martino, J. R.
    Romenesko, P.
    Ross, D.
    Rubinstein, H.
    Sander, H. G.
    Scheider, T.
    Schmidt, T.
    Schneider, D.
    Schneider, E.
    Schwarzl, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sun, A.
    Taboada, I.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Usechak, N.
    Donckt, M. V.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Lim, C. S.
    Yamanaka, T.
    Selected recent results from AMANDA2001In: ICHEP 2000. Proceedings of the 30th International Conference on High Energy Physics / [ed] Lim, C.S., Yamanaka, T., World Scientific, 2001, p. 965-968Conference paper (Refereed)
    Abstract [en]

    We present a selection of results based on data taken in 1997 with the 302-PMT Antarctic Muon and Neutrino Detector Array-B10 ("AMANDA-B10") array. Atmospheric neutrinos created in the northern hemisphere are observed indirectly through their charged current interactions which produce relativistic, Cherenkov-light-emitting upgoing muons in the South Pole ice cap. The reconstructed angular distribution of these events is in good agreement with expectation and demonstrates the viability of this ice-based device as a neutrino telescope. Studies of nearly vertical upgoing muons limit the available parameter space for WIMP dark matter under the assumption that WIMPS are trapped in the earth's gravitational potential well and annihilate with one another near the earth's center.

  • 28. Andres, E.
    et al.
    Askebjer, P.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becker, K. -H
    Bergström, L.
    Bertrand, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chirkin, D.
    Conrad, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dailing, J.
    Dalberg, E.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Erlandsson, B.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Goobar, A.
    Haase, H.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    He, Y. D.
    Hellwig, M.
    Heukenkamp, H.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D. M.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H.
    Mikolajski, T.
    Miller, T. C.
    Minaeva, Y.
    Miocinovic, P.
    Mock, P.
    Morse, R.
    Neunhöffer, T.
    Newcomer, F. M.
    Niessen, P.
    Nygren, D. R.
    Pérez de los Heros, C.
    Porrata, R.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Richards, A.
    Richter, S.
    Rodriguez Martino, J.
    Romenesko, P.
    Ross, D.
    Rubinstein, H.
    Sander, H. -G
    Scheider, T.
    Schmidt, T.
    Schneider, D.
    Schneider, E.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G.
    Spiering, C.
    Starinski, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sun, Q.
    Taboada, I.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Results from the AMANDA high energy neutrino detector2000In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 91, no 1-3, p. 423-430Article in journal (Refereed)
    Abstract [en]

    This paper briefly summarizes the search for astronomical sources of high-energy neutrinos using the AMANDA-B10 detector. The complete data set from 1997 was analyzed. For Eμ > 10 TeV, the detector exceeds 10,000 m2 in effective area between declinations of 25 and 90 degrees. Neutrinos generated in the atmosphere by cosmic ray interactions were used to verify the overall sensitivity of the detector. The absolute pointing accuracy and angular resolution has been confirmed by the analysis of coincident events between the SPASE air shower array and the AMANDA detector. Preliminary flux limits from point source candidates are presented. For declinations larger than +45 degrees, our results compare favorably to existing limits for sources in the Southern sky. We also present the current status of the searches for high energy neutrino emission from diffusely distributed sources, GRBs, and WIMPs from the center of the earth.

  • 29. Andres, E.
    et al.
    Askebjer, P.
    Barouch, G.
    Barwick, S.
    Bai, X.
    Becker, K.
    Bay, R.
    Bergström, L.
    Bertrand, D.
    Besson, D.
    Biron, A.
    Booth, J.
    Bothner, O.
    Bouchta, A.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Carlson, M.
    Chinowsky, W.
    Chirkin, D.
    Conrad, J.
    Costa, C.
    Cowen, D. F.
    Dahlberg, E.
    Dewulf, J.
    DeYoung, T.
    Edsjö, J.
    Ekström, P.
    Frichter, G.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    He, Y.
    Hardtke, R.
    Hill, G.
    Hulth, P.O.
    Hundertmark, S.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Kim, J.
    Kroci, B.
    Kowalski, M.
    Kravchenko, I.
    Lamoureux, J.
    Loaiza, P.
    Leich, H.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Liss, T.
    Liubarsky, I.
    Leuthold, M.
    Lowder, D.M.
    Ludvig, J.
    Marciniewski, P.
    Miller, T.
    Miocinovic, P.
    Mock, P.
    Newcomer, F. M.
    Morse, R.
    Niessen, P.
    Nygren, D.
    Perez de los Heros, C.
    Porrata, R.
    Price, P. B.
    Przybylski, G.
    Rawlins, K.
    Rhode, W.
    Richter, S.
    Rodriguez Martino, J.
    Romenesko, P.
    Ross, D.
    Rubenstein, H.
    Schneider, E.
    Schmidt, T.
    Schwarz, R.
    Silvestri, A.
    Smoot, G.
    Solarz, M.
    Spiczak, G.
    Spiering, C.
    Starinski, N.
    Steffen, P.
    Stokstad, R.
    Streicher, O.
    Taboada, I.
    Thon, T.
    Tilav, S.
    Vander Donckt, M.
    Walck, C.
    Wiebusch, C.
    Wischnewski, R.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    AMANDA: Status, results and future1999In: Proceedings, 8th International Workshop, Venice, Italy, February 23-26, 1999. Vol. 1, 2 / [ed] M.Baldo-Ceolin, 1999, p. 63-79Conference paper (Refereed)
    Abstract [en]

    We review the status of the AMANDA neutrino telescope. We present resultsobtained from the four-string prototype array AMANDA-B4 and describe themethods of track reconstruction and neutrino event separation. We give also firstresults of the analysis of the 10-string detector AMANDA-B10, in particular onatmospheric neutrinos and the search for magnetic monopoles. We sketch thefuture schedule on the way to a cube kilometer telescope at the South Pole,ICECUBE.

  • 30. Andres, E.
    et al.
    Askebjer, P.
    Barouch, G.
    Barwick, S. W.
    Bai, X.
    Bay, R.
    Becker, K.
    Bergstrom, L.
    Bertrand, D.
    Besson, D.
    Biron, A.
    Booth, J.
    Bothner, O.
    Bouchta, A.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Carlson, M.
    Chinowsky, W.
    Chirkin, D.
    Conrad, Jan
    Costa, C.
    Cowen, D.
    Dahlberg, E.
    Dewulf, J.
    DeYoung, T.
    Edsjo, P.
    Ekstrom, P.
    Frichter, G.
    Goodbar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    He, Y.
    Hardtke, R.
    Hill, G.
    Hulth, P.O.
    Hundertmark, S.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Kim, J.
    Koci, B.
    Kowalaski, M.
    Kravchenko, I.
    Lamoureux, J.
    Loaiza, P.
    Leich, P.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Liss, Tony M.
    Liubarsky, I.
    Leuthold, M.
    Lowder, D.M.
    Ludvig, J.
    Marciniewski, P.
    Miller, T.
    Miocinovic, P.
    Mock, P.
    Newcomer, M.
    Morse, R.
    Niessen, P.
    Nygren, D.
    Perez de los Heros, C.
    Porrata, R.
    Price, P. B.
    Przybylski, G.
    Rawlins, K.
    Rhodes, W.
    Richter, S.
    Rodriguez Martino, J.
    Romenesko, P.
    Ross, D.
    Rubenstein, H.
    Schneider, E.
    Schmidt, T.
    Schwartz, R.
    Silvestri, A.
    Smoot, George F.
    Solarz, M.
    Spiczak, G.
    Spiering, C.
    Starinski, N.
    Steffen, P.
    Stokstad, R.
    Streicher, O.
    Taboada, I.
    Thon, T.
    Tilav, S.
    Vander Donckt, M.
    Walck, C.
    Wiebusch, C.
    Wischnewski, R.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Observation of atmospheric neutrino events with the AMANDA experiment2000In: Proceedings of the 17th International Workshop on Weak Interactions and Neutrinos: Cape Town, South Africa, 24-30 January 1999 / [ed] Vollier R. D., Dominiguez C. A., World Scientific, 2000, p. 258-262Conference paper (Refereed)
  • 31. Andres, E.
    et al.
    Askebjer, P.
    Barwick, S. W.
    Bay, R.
    Bergström, L.
    Biron, A.
    Booth, J.
    Bouchta, A.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Carlson, M.
    Cowen, D.
    Dalberg, E.
    Deyoung, T.
    Ekström, P.
    Erlandson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Hardtke, R.
    Hart, S.
    He, Y.
    Heukenkamp, H.
    Hill, G.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Jones, A.
    Kandhadai, V.
    Karle, A.
    Koci, B.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Leuthold, M.
    Lowder, D. M.
    Marciniewski, P.
    Mikolajski, T.
    Miller, T.
    Miocinovic, P.
    Mock, P.
    Morse, R.
    Niessen, P.
    Pérez De Los Heros, C.
    Porrata, R.
    Potter, D.
    Price, P. B.
    Przybylski, G.
    Richards, A.
    Richter, S.
    Romenesko, P.
    Rubinstein, H.
    Schneider, E.
    Schmidt, T.
    Schwarz, R.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Streicher, O.
    Sun, Q.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Walck, C.
    Wiebusch, C.
    Wischnewski, R.
    Woschnagg, K.
    Yodh, G.
    The AMANDA neutrino telescope: Principle of operation and first results2000In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 13, no 1, p. 1-20Article in journal (Refereed)
    Abstract [en]

    AMANDA is a high-energy neutrino telescope presently under construction at the geographical South Pole. In the Antarctic summer 1995/96, an array of 80 optical modules (OMs) arranged on 4 strings (AMANDA-B4) was deployed at depths between 1.5 and 2 km. In this paper we describe the design and performance of the AMANDA-B4 prototype, based on data collected between February and November 1996. Monte Carlo simulations of the detector response to down-going atmospheric muon tracks show that the global behavior of the detector is understood. We describe the data analysis method and present first results on atmospheric muon reconstruction and separation of neutrino candidates. The AMANDA array was upgraded with 216 OMs on 6 new strings in 1996/97 (AMANDA-B10), and 122 additional OMs on 3 strings in 1997/98.

  • 32. Andrés, E.
    et al.
    Askebjer, P.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becker, K. -H
    Bergström, L.
    Bertrand, D.
    Bierenbaum, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dailing, J.
    Dalberg, E.
    De Young, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Erlandsson, B.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Goobar, A.
    Gray, L.
    Haase, H.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    He, Y. D.
    Hellwig, M.
    Heukenkamp, H.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D. M.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Mihalyi, A.
    Mikolajski, T.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Newcomer, F. M.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Pérez De Los Heros, C.
    Porrata, R.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Richards, A.
    Richter, S.
    Rodríguez Martino, J.
    Romenesko, P.
    Ross, D.
    Rubinstein, H.
    Sander, H. -G
    Scheider, T.
    Schmidt, T.
    Schneider, D.
    Schneider, E.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sun, Q.
    Taboada, I.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Usechak, N.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Recent results from AMANDA2001In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 16, no 1C, p. 1013-1015Article in journal (Refereed)
    Abstract [en]

    We present results based on data taken in 1997 with the 302-PMT Antarctic Muon and Neutrino Detector Array-B10 ("AMANDA-B10") array. Atmospheric neutrinos created in the northern hemisphere are observed indirectly through their charged current interactions which produce relativistic, Cherenkov-light-emitting upgoing muons in the South Pole ice cap. The reconstructed angular distribution of these events is in good agreement with expectation and demonstrates the viability of this ice-based device as a neutrino telescope.

  • 33. Andrés, E.
    et al.
    Askebjer, P.
    Bai, X.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becker, K. -H
    Bergström, L.
    Bertrand, D.
    Bierenbaum, D.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dailing, J.
    Dalberg, E.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Erlandsson, B.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Goobar, A.
    Gray, L.
    Haase, H.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    He, Y. D.
    Hellwig, M.
    Heukenkamp, H.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D. M.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Mihalyi, A.
    Mikolajski, T.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Mock, P. C.
    Morse, R.
    Neunhöffer, T.
    Newcomer, F. M.
    Niessen, P.
    Nygren, D. R.
    Ögelman, H.
    Pérez De Los Heros, C.
    Porrata, R.
    Price, P. B.
    Rawlins, K.
    Reed, C.
    Rhode, W.
    Richards, A.
    Richter, S.
    Martino, J. R.
    Romenesko, P.
    Ross, D.
    Rubinstein, H.
    Sander, H. -G
    Scheider, T.
    Schmidt, T.
    Schneider, D.
    Schneider, E.
    Schwarz, R.
    Silvestri, A.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sun, Q.
    Taboada, I.
    Thollander, L.
    Thon, T.
    Tilav, S.
    Usechak, N.
    Vander Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Observation of high-energy neutrinos using Čerenkov detectors embedded deep in Antarctic ice2001In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 410, no 6827, p. 441-443Article in journal (Refereed)
    Abstract [en]

    Neutrinos are elementary particles that carry no electric charge and have little mass. As they interact only weakly with other particles, they can penetrate enormous amounts of matter, and therefore have the potential to directly convey astrophysical information from the edge of the Universe and from deep inside the most cataclysmic high-energy regions. The neutrino's great penetrating power, however, also makes this particle difficult to detect. Underground detectors have observed low-energy neutrinos from the Sun and a nearby supernova2, as well as neutrinos generated in the Earth's atmosphere. But the very low fluxes of high-energy neutrinos from cosmic sources can be observed only by much larger, expandable detectors in, for example, deep water3,4 or ice5. Here we report the detection of upwardly propagating atmospheric neutrinos by the ice-based Antarctic muon and neutrino detector array (AMANDA). These results establish a technology with which to build a kilometre-scale neutrino observatory necessary for astrophysical observations1.

  • 34. Andrés, E.
    et al.
    Askebjer, P.
    Barwick, S. W.
    Bay, R.
    Bergström, L.
    Bouchta, A.
    Biron, A.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Costa, C.
    Cowen, D.
    Dalberg, E.
    Ekström, P.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Hart, S.
    He, Y.
    Hill, G.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Jones, A.
    Kandahai, V.
    Karle, A.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Lowder, D. M.
    Marciniewski, P.
    Mikolajski, T.
    Miller, T.
    Mock, P.
    Morse, R.
    Niessen, P.
    Nygren, D.
    Perez de Los Heros, C.
    Porrata, R.
    Potter, D.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Schneider, E.
    Schwarz, R.
    Spiering, C.
    Streicher, O.
    Thon, T.
    Tilav, S.
    Walck, C.
    Wiebusch, C.
    Wischnewski, R.
    Woschnagg, K.
    Yodh, G.
    Status of the AMANDA experiment1999In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 70, no 1-3, p. 448-452Article in journal (Refereed)
    Abstract [en]

    The AMANDA high energy neutrino telescope has successfully been increased in size from four detector strings to ten detector strings during the 1996/1997 season. The first upward going muon-neutrino candidates have been reconstructed from the 1996 year's four-string data. Three new detector strings will be deployed during 1997/1998 to 2350 metres depth.

  • 35. Andrés, E. C.
    et al.
    Askebjer, P.
    Barwick, S. W.
    Bay, R. C.
    Bergström, L.
    Biron, A.
    Booth, J.
    Botner, O.
    Bouchta, A.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Carlson, M.
    Chinowsky, W.
    Chirkin, D.
    Conrad, J.
    Costa, C. G. S.
    Cowen, D.
    Dalberg, E.
    DeYoung, T.
    Edsjö, J.
    Ekström, P.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Hardtke, R.
    Hart, S.
    He, Y.
    De Los Heros, C. P.
    Hill, G.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Jones, A.
    Kandhadai, V.
    Karle, A.
    Kim, J.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Liubarsky, I.
    Loaiza, P.
    Lowder, D.
    Marciniewski, P.
    Miller, T. C.
    Miocinovic, P.
    Mock, P. C.
    Morse, R.
    Newcomer, M.
    Niessen, P.
    Nygren, D.
    Porrata, R.
    Potter, D.
    Price, P. B.
    Przybylski, G.
    Rhode, W.
    Richter, S.
    Rodriguez, J.
    Romenesko, P.
    Ross, D.
    Rubinstein, H.
    Schmidt, T.
    Schneider, E.
    Schwarz, R.
    Schwendicke, U.
    Smoot, G.
    Solarz, M.
    Sorin, V.
    Spiering, C.
    Steffen, P.
    Stokstad, R.
    Streicher, O.
    Taboada, I.
    Thon, T.
    Tilav, S.
    Walck, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    The AMANDA neutrino telescope1999In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 77, no 1-3, p. 474-485Article in journal (Refereed)
    Abstract [en]

    With an effective telescope area of order 104 m2 for TeV neutrinos, a threshold near ∼50 GeV and a pointing accuracy of 2.5 degrees per muon track, the AMANDA detector represents the first of a new generation of high energy neutrino telescopes, reaching a scale envisaged over 25 years ago. We describe early results on the calibration of natural deep ice as a particle detector as well as on AMANDA's performance as a neutrino telescope.

  • 36. Armijo, V.
    et al.
    Black, K.
    Bolton, R. D.
    Carius, Staffan
    Department of Radiation Sciences, Uppsala University.
    Cooper, M. D.
    Espinoza, C.
    Hart, G.
    Hogan, G. E.
    Ludwig, G.
    Mischke, R. E.
    Piilonen, L.
    Stanislaus, S.
    Sandoval, J.
    Whitehouse, D. A.
    Wilkinson, C.
    Jui, C. C. H.
    A fast MWPC with cathode strips and utilizing CF4-isobutane1991In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 303, no 2, p. 298-308Article in journal (Refereed)
    Abstract [en]

    A planar wire chamber has been developed at LAMPF as a prototype for wire chambers of cylindrical configuration for electron detection in the MEGA experiment. Results form tests with the planar chamber have been used to set the geometrical parameters and predict the performance characteristics of the cylindrical chambers. The behavior of the planar chamber with CF4-isobutane gas demonstrates that 15 μm wire of 1 mm pitch is practical, that lifetimes greater than 0.045 C/cm are achievable and that gate widths of 25 ns are possible. © 1991.

  • 37. Askebjer, P.
    et al.
    Barwick, S.
    Bergstrom, L.
    Bouchta, A.
    Carius, Staffan
    Uppsala University.
    Coulthard, A.
    Engel, K.
    Erlandsson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Hulth, P. O.
    Jacobsen, J.
    Johansson, S.
    Kandhadai, V.
    Liubarsky, I.
    Lowder, D.
    Miller, T.
    Mock, P. C.
    Morse, R.
    Porrata, R.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Spang, J. C.
    Sun, Q.
    Tilav, S.
    Walck, C.
    Yodh, G.
    On the age vs depth and optical clarity of deep ice at South Pole1995In: Journal of Glaciology, ISSN 0022-1430, E-ISSN 1727-5652, Vol. 41, no 139, p. 445-454Article in journal (Refereed)
    Abstract [en]

    The first four strings of phototubes for the AMANDA high-energy neutrino observatory are now frozen in place at a depth of 800 to 1000 m in ice at the South Pole. During the 1995-96 season an additional six strings will be deployed at greater depths. Provided absorption, scattering, and refraction of visible light are sufficiently small, the trajectory of a muon into which a neutrino converts can be determined by using the array of phototubes to measure the arrival times of \v{C}erenkov light emitted by the muon. To help in deciding on the depth for implantation of the six new strings, we discuss models of age vs depth for South Pole ice, we estimate mean free paths for scattering from bubbles and dust as a function of depth, and we assess distortion of light paths due to refraction at crystal boundaries and interfaces between air-hydrate inclusions and normal ice. We conclude that the depth interval 1600 to 1800 m will be suitably transparent for the next six AMANDA strings and, moreover, that the interval 1600 to 2100 m will be suitably transparent for a future 1-km 3   observatory except possibly in a region a few tens of meters thick at a depth corresponding to a peak in the dust concentration at 60 kyr BP.

  • 38. Askebjer, P.
    et al.
    Barwick, S. W.
    Bay, R.
    Bergström, L.
    Bouchta, A.
    Carius, Staffan
    University of Uppsala.
    Dahlberg, E.
    Engel, K.
    Erlandsson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Heukenkamp, H.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Johansson, S.
    Kandhadai, V.
    Karle, A.
    Liubarsky, I.
    Lowder, D.
    Mikolajski, T.
    Miller, T. C.
    Mock, P.
    Morse, R.
    Nygren, D.
    Porrata, R.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Schneider, E.
    Spiering, C.
    Streicher, O.
    Sun, Q.
    Thon, T.
    Tilav, S.
    Walck, C.
    Wiebusch, C.
    Wischnewski, R.
    Yodh, G.
    Belolaptikov, I. A.
    Bezrukov, L. B.
    Borisovets, B. A.
    Budnev, N. M.
    Chensky, A. G.
    Danilchenko, I. A.
    Djilkibaev, Zh.-A.M.
    Dobrynin, V. I.
    Domogatsky, G. V.
    Doroshenko, A. A.
    Fialkovsky, S. V.
    Gaponenko, O. N.
    Garus, A. A.
    Gress, T. A.
    Ignat'ev, S. B.
    Klabukov, A. M.
    Klimov, A. I.
    Klimushin, S. I.
    Koshechkin, A. P.
    Kulepov, V. F.
    Kuzmichev, L. A.
    Lubsandorzhiev, B. K.
    Milenin, M. B.
    Mirgazov, R. R.
    Moroz, A. V.
    Moseiko, N. I.
    Nikiforov, S. A.
    Osipova, E. A.
    Pandel, D.
    Panfilov, A. I.
    Parfenov, Yu.V.
    Pavlov, A. A.
    Petukhov, D. P.
    Pocheikin, K. A.
    Pokhil, P. G.
    Pokolev, P. A.
    Rosanov, M. I.
    Rubzov, V.Yu.
    Sinegovsky, S. I.
    Sokalski, I. A.
    Spiering, Ch.
    Tarashansky, B. A.
    Status of the AMANDA and BAIKAL neutrino telescopes1997In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 52, no 3, p. 256-260Article in journal (Refereed)
  • 39. Askebjer, P.
    et al.
    Barwick, S. W.
    Bergström, L.
    Bouchta, A.
    Carius, Staffan
    Coulthard, A.
    Engel, K.
    Erlandsson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Hulth, P. O.
    Jacobsen, J.
    Johansson, S.
    Kandhadai, V.
    Liubarsky, I.
    Lowder, D.
    Miller, T.
    Mock, P. C.
    Morse, R.
    Porrata, R.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Schneider, E.
    Sun, Q.
    Tilav, S.
    Walck, C.
    Yodh, G.
    Optical properties of the South Pole ice at depths between 0.8 and 1 kilometer1995In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 267, no 5201, p. 1147-1150Article in journal (Refereed)
    Abstract [en]

    The optical properties of the ice at the geographical South Pole have been investigated at depths between 0.8 and 1 kilometer. The absorption and scattering lengths of visible light (∼515 nanometers) have been measured in situ with the use of the laser calibration setup of the Antarctic Muon and Neutrino Detector Array (AMANDA) neutrino detector. The ice is intrinsically extremely transparent. The measured absorption length is 59 ± 3 meters, comparable with the quality of the ultrapure water used in the Irvine-Michigan-Brookhaven and Kamiokande proton-decay and neutrino experiments and more than twice as long as the best value reported for laboratory ice. Because of a residual density of air bubbles at these depths, the trajectories of photons in the medium are randomized. If the bubbles are assumed to be smooth and spherical, the average distance between collisions at a depth of 1 kilometer is about 25 centimeters. The measured inverse scattering length on bubbles decreases linearly with increasing depth in the volume of ice investigated.

  • 40. Askebjer, P.
    et al.
    Barwick, S. W.
    Bergström, L.
    Bouchta, A.
    Carius, Staffan
    Uppsala University.
    Coulthard, A.
    Engel, K.
    Erlandsson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Hulth, P. O.
    Jacobsen, J.
    Johansson, S.
    Kandhadai, V.
    Liubarsky, I.
    Lowder, D.
    Miller, T.
    Mock, P.
    Morse, R.
    Porrata, R.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Schneider, E.
    Sun, Q.
    Tilav, S.
    Walck, C.
    Yodh, G.
    AMANDA: status report from the 1993-94 campaign and optical properties of the South Pole ice1995In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 38, no 1-3, p. 287-292Article in journal (Refereed)
    Abstract [en]

    We report the first results of the AMANDA detector. During the antarctic summer 1993-94 four strings were deployed between 0.8 an 1 km depth, each equipped with 20 photomultiplier tubes (PMTs). A laser source was used to investigate the optical properties of the ice in situ. We find that the ice is intrinsically extremely transparent. The measured absorption length is 59 ± 3 m, i.e. comparable with the quality of the ultra-pure water used in the IMB and Kamiokande proton-decay and neutrino experiments [1,2] and more than two times longer than the best value reported for laboratory ice [3]. Due to a residual density of air bubbles at these depths, the motion of photons in the medium is randomized. For spherical, smooth bubbles we find that, at 1 km depth, the average distance between collisions is about 25 cm. The measured inverse scattering length on bubbles decreases linearly with increasing depth in the volume of ice investigated. © 1995 Elsevier Science B.V. All rights reserved.

  • 41. Askebjer, P.
    et al.
    Barwick, S. W.
    Bergström, L.
    Bouchta, A.
    Carius, Staffan
    Department of Radiation Sciences, Uppsala University.
    Dalberg, E.
    Erlandsson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Heukenkamp, H.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Liubarsky, I.
    Lowder, D.
    Miller, T.
    Mock, P.
    Morse, R.
    Porrata, R.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Schneider, E.
    Spiering, Ch.
    Streicher, O.
    Sun, Q.
    Thon, Th.
    Tilav, S.
    Wischnewski, R.
    Walck, C.
    Yodh, G.
    UV and optical light transmission properties in deep ice at the South Pole1997In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 24, no 11, p. 1355-1358Article in journal (Refereed)
    Abstract [en]

    Both absorption and scattering of light at wavelengths 410 to 610 nanometers were measured in the South Pole ice at depths 0.8 to 1 kilometer with the laser calibration system of the Antarctic Muon And Neutrino Detector Array (AMANDA). At the shortest wavelengths the absorption lengths exceeded 200 meters - an order of magnitude longer than has been reported for laboratory ice. The absorption shows a strong wavelength dependence while the scattering length is found to be independent of the wavelength, consistent with the hypothesis of a residual density of air bubbles in the ice. The observed linear decrease of the inverse scattering length with depth is compatible with an earlier measurement by the AMANDA collaboration (at ∼515 nanometers).

  • 42. Askebjer, P.
    et al.
    Berwick, S. W.
    Bergström, L.
    Bouchta, A.
    Carius, Staffan
    Department of Radiation Sciences, Uppsala University.
    Dalberg, E.
    Engel, K.
    Erlandsson, B.
    Goobar, A.
    Gray, L.
    Hallgren, A.
    Halzen, F.
    Heukenkamp, H.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kandhadai, V.
    Liubarsky, I.
    Lowder, D.
    Miller, T.
    Mock, P.
    Morse, R. M.
    Porrata, R.
    Price, P. B.
    Richards, A.
    Rubinstein, H.
    Schneider, E.
    Spiering, C.
    Streicher, O.
    Sun, Q.
    Thon, T.
    Tilav, S.
    Wischnewski, R.
    Walck, C.
    Yodh, G. B.
    Optical properties of deep ice at the South Pole: Absorption1997In: Applied Optics, ISSN 0003-6935, E-ISSN 1539-4522, Vol. 36, no 18, p. 4168-4180Article in journal (Refereed)
    Abstract [en]

    We discuss recent measurements of the wavelength-dependent absorption coefficients in deep South Pole ice. The method uses transit-time distributions of pulses from a variable-frequency laser sent between emitters and receivers embedded in the ice. At depths of 800-1000 m scattering is dominated by residual air bubbles, whereas absorption occurs both in ice itself and in insoluble impurities. The absorption coefficient increases approximately exponentially with wavelength in the measured interval 410-610 nm. At the shortest wavelength our value is approximately a factor 20 below previous values obtained for laboratory ice and lake ice; with increasing wavelength the discrepancy with previous measurements decreases. At ∼415 to ∼500 nm the experimental uncertainties are small enough for us to resolve an extrinsic contribution to absorption in ice: submicrometer dust particles contribute by an amount that increases with depth and corresponds well with the expected increase seen near the Last Glacial Maximum in Vostok and Dome C ice cores. The laser pulse method allows remote mapping of gross structure in dust concentration as a function of depth in glacial ice.

  • 43. Atwood, W. B.
    et al.
    Abdo, A. A.
    Ackermann, M.
    Althouse, W.
    Anderson, B.
    Axelsson, M.
    Baldini, L.
    Ballet, J.
    Band, D. L.
    Barbiellini, G.
    Bartelt, J.
    Bastieri, D.
    Baughman, B. M.
    Bechtol, K.
    Bederede, D.
    Bellardi, F.
    Bellazzini, R.
    Berenji, B.
    Bignami, G. F.
    Bisello, D.
    Bissaldi, E.
    Blandford, R. D.
    Bloom, E. D.
    Bogart, J. R.
    Bonamente, E.
    Bonnell, J.
    Borgland, A. W.
    Bouvier, A.
    Bregeon, J.
    Brez, A.
    Brigida, M.
    Bruel, P.
    Burnett, T. H.
    Busetto, G.
    Caliandro, G. A.
    Cameron, R. A.
    Caraveo, P. A.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Carlson, P.
    Casandjian, J. M.
    Cavazzuti, E.
    Ceccanti, M.
    Cecchi, C.
    Charles, E.
    Chekhtman, A.
    Cheung, C. C.
    Chiang, J.
    Chipaux, R.
    Cillis, A. N.
    Ciprini, S.
    Claus, R.
    Cohen-Tanugi, J.
    Condamoor, S.
    Conrad, J.
    Corbet, R.
    Corucci, L.
    Costamante, L.
    Cutini, S.
    Davis, D. S.
    Decotigny, D.
    DeKlotz, M.
    Dermer, C. D.
    De Angelis, A.
    Digel, S. W.
    Silva, Edce
    Drell, P. S.
    Dubois, R.
    Dumora, D.
    Edmonds, Y.
    Fabiani, D.
    Farnier, C.
    Favuzzi, C.
    Flath, D. L.
    Fleury, P.
    Focke, W. B.
    Funk, S.
    Fusco, P.
    Gargano, F.
    Gasparrini, D.
    Gehrels, N.
    Gentit, F. X.
    Germani, S.
    Giebels, B.
    Giglietto, N.
    Giommi, P.
    Giordano, F.
    Glanzman, T.
    Godfrey, G.
    Grenier, I. A.
    Grondin, M. H.
    Grove, J. E.
    Guillemot, L.
    Guiriec, S.
    Haller, G.
    Harding, A. K.
    Hart, P. A.
    Hays, E.
    Healey, S. E.
    Hirayama, M.
    Hjalmarsdotter, L.
    Horn, R.
    Hughes, R. E.
    Johannesson, G.
    Johansson, G.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Johnson, A. S.
    Johnson, R. P.
    Johnson, T. J.
    Johnson, W. N.
    Kamae, T.
    Katagiri, H.
    Kataoka, J.
    Kavelaars, A.
    Kawai, N.
    Kelly, H.
    Kerr, M.
    Klamra, W.
    Knodlseder, J.
    Kocian, M. L.
    Komin, N.
    Kuehn, F.
    Kuss, M.
    Landriu, D.
    Latronico, L.
    Lee, B.
    Lee, S. H.
    Lemoine-Goumard, M.
    Lionetto, A. M.
    Longo, F.
    Loparco, F.
    Lott, B.
    Lovellette, M. N.
    Lubrano, P.
    Madejski, G. M.
    Makeev, A.
    Marangelli, B.
    Massai, M. M.
    Mazziotta, M. N.
    McEnery, J. E.
    Menon, N.
    Meurer, C.
    Michelson, P. F.
    Minuti, M.
    Mirizzi, N.
    Mitthumsiri, W.
    Mizuno, T.
    Moiseev, A. A.
    Monte, C.
    Monzani, M. E.
    Moretti, E.
    Morselli, A.
    Moskalenko, I. V.
    Murgia, S.
    Nakamori, T.
    Nishino, S.
    Nolan, P. L.
    Norris, J. P.
    Nuss, E.
    Ohno, M.
    Ohsugi, T.
    Omodei, N.
    Orlando, E.
    Ormes, J. F.
    Paccagnella, A.
    Paneque, D.
    Panetta, J. H.
    Parent, D.
    Pearce, M.
    Pepe, M.
    Perazzo, A.
    Pesce-Rollins, M.
    Picozza, P.
    Pieri, L.
    Pinchera, M.
    Piron, F.
    Porter, T. A.
    Poupard, L.
    Raino, S.
    Rando, R.
    Rapposelli, E.
    Razzano, M.
    Reimer, A.
    Reimer, O.
    Reposeur, T.
    Reyes, L. C.
    Ritz, S.
    Rochester, L. S.
    Rodriguez, A. Y.
    Romani, R. W.
    Roth, M.
    Russell, J. J.
    Ryde, F.
    Sabatini, S.
    Sadrozinski, H. F. W.
    Sanchez, D.
    Sander, A.
    Sapozhnikov, L.
    Parkinson, P. M. S.
    Scargle, J. D.
    Schalk, T. L.
    Scolieri, G.
    Sgro, C.
    Share, G. H.
    Shaw, M.
    Shimokawabe, T.
    Shrader, C.
    Sierpowska-Bartosik, A.
    Siskind, E. J.
    Smith, D. A.
    Smith, P. D.
    Spandre, G.
    Spinelli, P.
    Starck, J. L.
    Stephens, T. E.
    Strickman, M. S.
    Strong, A. W.
    Suson, D. J.
    Tajima, H.
    Takahashi, H.
    Takahashi, T.
    Tanaka, T.
    Tenze, A.
    Tether, S.
    Thayer, J. B.
    Thayer, J. G.
    Thompson, D. J.
    Tibaldo, L.
    Tibolla, O.
    Torres, D. F.
    Tosti, G.
    Tramacere, A.
    Turri, M.
    Usher, T. L.
    Vilchez, N.
    Vitale, V.
    Wang, P.
    Watters, K.
    Winer, B. L.
    Wood, K. S.
    Ylinen, T.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Ziegler, M.
    THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION2009In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 697, no 2, p. 1071-1102Article in journal (Refereed)
    Abstract [en]

    The Large Area Telescope (Fermi/LAT, hereafter LAT), the primary instrument on the Fermi Gamma-ray Space Telescope (Fermi) mission, is an imaging, wide field-of-view (FoV), high-energy gamma-ray telescope, covering the energy range from below 20 MeV to more than 300 GeV. The LAT was built by an international collaboration with contributions from space agencies, high-energy particle physics institutes, and universities in France, Italy, Japan, Sweden, and the United States. This paper describes the LAT, its preflight expected performance, and summarizes the key science objectives that will be addressed. On-orbit performance will be presented in detail in a subsequent paper. The LAT is a pair-conversion telescope with a precision tracker and calorimeter, each consisting of a 4 x 4 array of 16 modules, a segmented anticoincidence detector that covers the tracker array, and a programmable trigger and data acquisition system. Each tracker module has a vertical stack of 18 (x, y) tracking planes, including two layers (x and y) of single-sided silicon strip detectors and high-Z converter material (tungsten) per tray. Every calorimeter module has 96 CsI(Tl) crystals, arranged in an eight-layer hodoscopic configuration with a total depth of 8.6 radiation lengths, giving both longitudinal and transverse information about the energy deposition pattern. The calorimeter's depth and segmentation enable the high-energy reach of the LAT and contribute significantly to background rejection. The aspect ratio of the tracker (height/width) is 0.4, allowing a large FoV (2.4 sr) and ensuring that most pair-conversion showers initiated in the tracker will pass into the calorimeter for energy measurement. Data obtained with the LAT are intended to (1) permit rapid notification of high-energy gamma-ray bursts and transients and facilitate monitoring of variable sources, (2) yield an extensive catalog of several thousand high-energy sources obtained from an all-sky survey, (3) measure spectra from 20 MeV to more than 50 GeV for several hundred sources, (4) localize point sources to 0.3-2 arcmin, (5) map and obtain spectra of extended sources such as SNRs, molecular clouds, and nearby galaxies, (6) measure the diffuse isotropic gamma-ray background up to TeV energies, and (7) explore the discovery space for dark matter.

  • 44. Bai, X.
    et al.
    Barouch, G.
    Barwick, S. W.
    Bay, R. C.
    Becker, K. -H
    Bergström, L.
    Bertrand, D.
    Biron, A.
    Botner, O.
    Bouchta, A.
    Boyce, M. M.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Chen, A.
    Chirkin, D.
    Conrad, J.
    Cooley, J.
    Costa, C. G. S.
    Cowen, D. F.
    Dailing, J.
    Dalberg, E.
    DeYoung, T.
    Desiati, P.
    Dewulf, J. -P
    Doksus, P.
    Edsjö, J.
    Ekström, P.
    Feser, T.
    Gaug, M.
    Goldschmidt, A.
    Goobar, A.
    Hallgren, A.
    Halzen, F.
    Hanson, K.
    Hardtke, R.
    Hellwig, M.
    Hill, G. C.
    Hulth, P. O.
    Hundertmark, S.
    Jacobsen, J.
    Karle, A.
    Kim, J.
    Koci, B.
    Köpke, L.
    Kowalski, M.
    Lamoureux, J. I.
    Leich, H.
    Leuthold, M.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Loaiza, P.
    Lowder, D. M.
    Ludvig, J.
    Madsen, J.
    Marciniewski, P.
    Matis, H. S.
    Miller, T. C.
    Minaeva, Y.
    Miočinović, P.
    Morse, R.
    Neunhöffer, T.
    Niessen, P.
    Nygren, D. R.
    Ogelman, H.
    Pérez de los Heros, C.
    Price, P. B.
    Rawlins, K.
    Rhode, W.
    Richter, S.
    Martino, J.Rodríguez
    Romenesko, P.
    Ross, D.
    Rubinstein, H.
    Sander, H. -G
    Scheider, T.
    Schmidt, T.
    Schneider, D.
    Schwarz, R.
    Silvestri, A.
    Smoot, G.
    Solarz, M.
    Spiczak, G. M.
    Spiering, C.
    Starinsky, N.
    Steele, D.
    Steffen, P.
    Stokstad, R. G.
    Streicher, O.
    Sudhoff, P.
    Taboada, I.
    Donckt, M.
    Walck, C.
    Weinheimer, C.
    Wiebusch, C. H.
    Wischnewski, R.
    Wissing, H.
    Woschnagg, K.
    Wu, W.
    Yodh, G.
    Young, S.
    Status of the Neutrino Telescope AMANDA: Monopoles and WIMPS2001In: Dark Matter in Astro- and Particle Physics: Proceedings of the International Conference DARK 2000 Heidelberg, Germany, 10–14 July 2000 / [ed] H. V. Klapdor-Kleingrothaus, Springer, 2001, p. 699-706Conference paper (Refereed)
    Abstract [en]

    The neutrino telescope AMANDA has been set up at the geographical South Pole as first step to a neutrino telescope of the scale of one cubic kilometer, which is the canonical size for a detector sensitive to neutrinos from Active Galactic Nuclei (AGN), Gamma Ray Bursts (GRB) and Topological Defects (TD). The location and depth in which the detector is installed is given by the requirement to detect neutrinos by the Cherenkov light produced by their reaction products and to keep the background due to atmospheric muons as small as possible. However, a detector optimized for this purpose is also capable to detect the bright Cherenkov light from relativistic Monopoles and neutrino signals from regions with high gravitational potential, where WIMPS are accumulated and possibly annihilate. Both hypothetical particles might contribute to the amount of dark matter. Therefore here a report about the status of the experiment (autumn 2000) and about the status of the search for these particles with the AMANDA B10 sub-detector is given.

  • 45. Barwick, S. W.
    et al.
    Booth, J.
    Kim, J.
    Mock, R.
    Porrata, R.
    Ross, D.
    Wu, W.
    Yodh, G.
    Young, S.
    Miller, T.
    Biron, A.
    Hundertmark, S.
    Leich, H.
    Leothold, M.
    Niessen, P.
    Richter, S.
    Schmidt, T.
    Schwendicke, U.
    Spiering, C.
    Steffen, P.
    Streicher, O.
    Thon, T.
    Wiebusch, C.
    Wischnewski, R.
    Carius, Staffan
    University of Kalmar, Department of Technology.
    Lindahl, P.
    University of Kalmar, Department of Technology.
    Andres, E.
    Bergstrom, L.
    Bouchta, A.
    Dalberg, E.
    Edsjo, J.
    Ekstrom, P.
    Goodbar, A.
    Hulth, P.
    Rodriguez, J.
    Walck, C.
    Bay, R.
    He, Y.
    Lowder, D.
    Miocinovic, P.
    Price, P. B.
    Rhode, W.
    Solarz, M.
    Woschnagg, K.
    Cowen, D.
    Newcomer, M.
    Carlson, M.
    DeYoung, T.
    Halzen, F.
    Hardtke, R.
    Hill, G.
    Jacobsen, J.
    Kandhadai, V.
    Karle, A.
    Liubarsky, I.
    Morse, R.
    Romenesko, P.
    Tilav, S.
    Chinowsky, W.
    Nygren, D.
    Przybylski, G.
    Smoot, George F.
    Stokstad, R.
    Botner, O.
    Hallgren, A.
    Loaiza, P.
    Marciniewski, P.
    Perez de los Heros, C.
    Rubinstein, H.
    Initial results from the AMANDA high-energy neutrino detector1998In: High-energy physics. Proceedings, 29th International Conference, ICHEP'98, Vancouver, Canada, July 23-29, 1998. Vol. 1, 2 / [ed] A. Astbury, D. Axen, J. Robinson, 1998, p. 1447-1452Conference paper (Refereed)
  • 46.
    Baskaran, Karthikeyan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Theagarayan, Baskar
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Carius, Staffan
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Gustafsson, Jörgen
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Influence of age on peripheral aberration2010Conference paper (Refereed)
    Abstract [en]

    The purpose of this study is to compare peripheral higher order aberrations in young

    and old emmetropic eyes across the horizontal (±40°) and inferior (–20°) visual field.

    Introduction

     

     

    People with central visual field loss use eccentric fixation for various visual tasks.

    Recently studies have shown that the correction of lower order aberrations (defocus &

    astigmatism) can improve eccentric vision in subjects with central visual field loss

    (CFL)[1]. The CFL subjects mostly correspond to older age groups who use eccentric

    fixation angles up to 20°–30°. While there have been studies comparing the off-axis

    lower order aberrations in normal young and old subjects[2], there is only one recent

    study, which has compared off-axis higher order aberrations in normal young and old

    emmetropic eyes up to 20° (horizontal and vertical) eccentricity[3]. In this study we

    have measured off-axis aberrations in a group of 10 young (23 ± 3 years) and 10 old

    (57 ± 4 years) emmetropes. The aberrations of the right eye were measured using

    COAS-HD VR Hartmann-Shack aberrometer in steps 10° out to ± 40° horizontally and

    –20° inferiorly in the visual field. Subjects rotated the eyes to view the fixation targets,

    which were red light emitting diodes, placed at 3 meter from the eye. The aberrations

    were quantified for a pupil area 5 mm in diameter.

    Discussion

     

     

    Mixed between-within subject’s analysis of variance of the horizontal coma C13

    showed that there was a statistically significant difference between age groups

    (p<0.05). The coma increased linearly in both groups from nasal to temporal visual

    field. The rate of change was greater in the old (slope = –0.027 μm/deg) compared

    to the young (slope = –0.012 μm/deg) emmetropes. In the inferior visual field,

    vertical coma C-13 changed linearly in both groups with higher values in old (slope =

    0.015 μm/deg) compared to young (slope = 0.006 μm/deg). The mean spherical

    aberration was positive in older emmetropes (0.053 μm) compared to young

    emmetropes (-0.030 μm). The HO RMS showed a quadratic increase in the

    periphery for both age groups. The HO RMS was greater in older emmetropes but it

    was not statistically significant (p>0.05) when compared to young emmetropes.

     

    Conclusions

     

     

    Our results show that there is an increase in coma, spherical aberration, and HO

    RMS with age in the periphery.

  • 47.
    Baskaran, Karthikeyan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Theagarayan, Baskar
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Carius, Staffan
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Gustafsson, Jörgen
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Measurement of Off-axis Refraction with a Commercial Open Field Aberrometer2010Conference paper (Refereed)
    Abstract [en]

    Purpose:

    People with central visual field loss (CFL) use their remaining peripheral vision in order to see better when performing various visual related tasks. At large off-axis angles, the eccentric vision can be limited both by the low resolution capacity of the peripheral retina and by the optical aberrations caused due to oblique angles. Previous work has shown that eccentric correction of induced off-axis astigmatism can improve vision in a preferred retinal location (PRL) for people with CFL. However, the eccentric refraction is often difficult to determine with traditional refractive methods. This work therefore shows the use of a commercially available wavefront sensor to measure fast and reliable off-axis refraction. Data on off-axis refraction is also of interest in the field of myopia research.

    Methods:

    We used the new open-field high-definition complete ophthalmic analysis system, COAS HD -VR, to evaluate off-axis refraction. Using the special Vision Research tool in this system stimulus (fixation objects) can be presented in a large part of the visual field. The instrument can measure out to 40 degrees in the horizontal visual field and 20 degrees in the vertical visual field with a range from sphere +7 D to − 17 D. It measures astigmatism up to 10 D. This instrument also allows natural binocular viewing without obstacles. Aberrations of the right eye of 30 emmetropes (24 ± 4 years) were studied. Off-axis refraction and higher order (HO) aberrations were measured in steps of 10° out to ± 30° in the horizontal visual field

    Results:

    The first data on young emmetropic eyes with this new instrument showed promising results for low (LO) and higher order (HO) aberrations in the peripheral visual field. Of the LO aberrations, astigmatism increased significantly with the off–axis angle, from 0.25 D at 10° Nasal to 1.65 D at 30° Nasal. In the HO aberrations, coma (C13) showed a linear increase across the horizontal visual field (p < 0.05)

    Conclusions:

    The COAS HD-VR shows promising results and good usability for future research in evaluation of off-axis refraction. In future we believe the aberrometer can be used clinically to measure off-axis refractions in low vision patients.

  • 48.
    Baskaran, Karthikeyan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Theagarayan, Baskar
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Carius, Staffan
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Gustafsson, Jörgen
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Ocular Aberrations in the Peripheral Visual Field With a Commercial Open-View Aberrometer2010In: Investigative Ophthalmology and Visual Science, ISSN 0146-0404, E-ISSN 1552-5783, Vol. 51, no 5, article id 3951Article in journal (Refereed)
    Abstract [en]

    PurposeThe interest in off-axis aberrations has increased with the discovery of a possible link between myopia development and peripheral optics. The most common technology to measure the off-axis aberrations is a Shack-Hartmann wavefront aberrometer. This is the first study to report peripheral aberrations in a large sample of emmetropic population with a commercial open-view Shack-Hartmann aberrometer. MethodsThe commercial open-view Shack-Hartmann aberrometer COAS-HD VR was used to measure the aberrations in the peripheral vision. Aberrations of the right eye of 30 emmetropes (24 {+/-} 4 years) were studied. Off-axis aberrations were measured in steps of 10{degrees} out to {+/-} 30{degrees} in the horizontal visual field. The subjects turned their eye to view the off-axis fixation target (light emitting diode placed at 3 meters) during the measurement. The resulting wavefront aberrations were parameterized with Zernike coefficients for a 5 mm diameter pupil. All analyzes are reported according to optical society of America (OSA) recommended standards. ResultsAberrations from the 2nd to 6th order and the total higher-order root-mean-square (HO RMS) were analyzed using one-way ANOVA. The defocus C02 was significantly myopic in the nasal visual field (+20{degrees}, +30{degrees}) whereas there was no significant difference in the temporal visual field. Astigmatism C22 increased quadratically from {+/-}10{degrees} in the periphery and coma C13 showed a linear increase across the horizontal visual field (p < 0.05). The spherical aberration C04 and the total HO RMS showed a significant change at {+/-}30o. ConclusionsOur results showed that in young emmetropes there was a significant increase of HO RMS at {+/-}30{degrees}, which is expected. Astigmatism, horizontal coma, and spherical aberration vary systematically across the horizontal visual field in agreement with Seidel theory. The findings of our study with a large sample of emmetropic population agree with the previous studies done with laboratory built aberrometers.

  • 49.
    Baskaran, Karthikeyan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Theagarayan, Baskar
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Carius, Staffan
    Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
    Gustafsson, Jörgen
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    Repeatability of Peripheral Aberrations in Young Emmetropes2010In: Optometry and Vision Science, ISSN 1040-5488, E-ISSN 1538-9235, Vol. 87, no 10, p. 751-759Article in journal (Refereed)
    Abstract [en]

    PURPOSE.: The purpose of this study is to assess the intrasession repeatability of ocular aberration measurements in the peripheral visual field with a commercially available Shack-Hartmann aberrometer (complete ophthalmic analysis system-high definition-vision research). The higher-order off-axis aberrations data in young healthy emmetropic eyes are also reported.

    METHODS.: The aberrations of the right eye of 18 emmetropes were measured using an aberrometer with an open field of view that allows peripheral measurements. Five repeated measures of ocular aberrations were obtained and assessed in steps of 10 degrees out to +/-40 degrees in the horizontal visual field (nasal + and temporal -) and -20 degrees in the inferior visual field. The coefficient of repeatability, coefficient of variation, and the intraclass correlation coefficient were calculated as a measure of intrasession repeatability.

    RESULTS.: In all eccentric angles, the repeatability of the third- and fourth-order aberrations was better than the fifth and sixth order aberrations. The coefficient of variation was <30% and the intraclass correlation coefficient was >0.90 for the third and fourth order but reduced gradually for higher orders. There was no statistical significant difference in variance of total higher-order root mean square between on- and off-axis measurements (p > 0.05). The aberration data in this group of young emmetropes showed that the horizontal coma (C13) was most positive at 40 degrees in the temporal field, decreasing linearly toward negative values with increasing off-axis angle into the nasal field, whereas all other higher-order aberrations showed little or no change.

    CONCLUSIONS.: The complete ophthalmic analysis system-high definition-vision research provides fast, repeatable, and valid peripheral aberration measurements and can be used efficiently to measure off-axis aberrations in the peripheral visual field

  • 50. Bay, R. C.
    et al.
    He, Y.
    Lowder, D.
    Miocinovic, P.
    Price, P. B.
    Solarz, M.
    Woschnagg, K.
    Barwick, S. W.
    Booth, J.
    Mock, P. C.
    Porrata, R.
    Schneider, E.
    Yodh, G.
    Cowen, D.
    Carlson, M.
    Costa, C. G. S.
    Deyoung, T.
    Gray, L.
    Halzen, F.
    Hardtke, R.
    Jacobsen, J.
    Kankhadai, V.
    Karle, A.
    Liubarsky, I.
    Morse, R.
    Tilav, S.
    Miller, T. C.
    Andrés, E. C.
    Askebjer, P.
    Bergström, L.
    Bouchta, A.
    Dalberg, E.
    Ekström, P.
    Goobar, A.
    Hulth, P. O.
    Walck, C.
    Hallgren, A.
    Heros, C. P. D. L.
    Marciniewski, P.
    Rubinstein, H.
    Carius, Staffan
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Lindahl, P.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Biron, A.
    Hundertmark, S.
    Leuthold, M.
    Niessen, P.
    Spiering, C.
    Streicher, O.
    Thon, T.
    Wiebusch, C. H.
    Wischnewski, R.
    Nygren, D.
    Jones, A.
    Hart, S.
    Potter, D.
    Hill, G.
    Schwarz, R.
    The AMANDA neutrino telescope and the indirect search for dark matter: AMANDA Colaboration1998In: Physics reports, ISSN 0370-1573, E-ISSN 1873-6270, Vol. 307, no 1-4, p. 243-252Article in journal (Refereed)
    Abstract [en]

    With an effective telescope area of order 104m2, a threshold of ~50GeV and a pointing accuracy of 2.5°, the AMANDA detector represents the first of a new generation of high energy neutrino telescopes, reaching a scale envisaged over 25 years ago. We describe its performance, focussing on the capability to detect halo dark matter particles via their annihilation into neutrinos.

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