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  • 151.
    Becherini, Yvonne
    et al.
    University of Paris Diderot .
    Boisson, C.
    Cerruti, M.
    Discovery of VHE gamma-ray emission from the very distant BL Lac KUV00311-1938 by HESS2012In: HIGH ENERGY GAMMA-RAY ASTRONOMY, American Institute of Physics (AIP), 2012, p. 490-493Conference paper (Refereed)
    Abstract [en]

    The observed spectra of very-high-energy (VHE) blazars may be deformed by gamma-gamma absorption onto the Extra-galactic Background Light (EBL) or, more speculatively, by photon-axion oscillations. As the resulting imprint on observed spectral characteristics may be redshift-dependent, it is important to enrich the catalogue of VHE high-redshift blazars. HESS-II [1], with its low-energy threshold and enhanced E > 100 GeV sensitivity, will be a major instrument in this field of study. While awaiting this new phase of the experiment, H. E. S. S. observed the very distant BL Lac KUV00311 - 1938 in a multi-year campaign, leading to the discovery of its VHE gamma-ray emission with a significance of 5.1 standard deviations. The detection of this source has been possible thanks to an enhanced low-energy sensitivity of recent-developed analysis techniques for IACTs (Paris-MVA) and a full refurbishment which markedly lowered the overall analysis threshold. The evaluation of the redshift of this source is difficult, due to the weakness of the absorption lines in the optical spectrum. A first attempt to evaluate this redshift was performed by [2], and [3], where a value of 0.61 was quoted with a question mark. More recently, [4] used the data from the X-Shooter spectrograph operating on the VLT to estimate a solid lower limit on the redshift of the source of z > 0.506, confirming that KUV00311 - 1938 is the farthest BL Lac ever detected at VHE.

  • 152.
    Becherini, Yvonne
    et al.
    Università di Bologna, Italy ; INFN, Italy.
    Cecchini, S
    Chiarusi, T
    Cozzi, M
    Dekhissi, H
    Derkaoui, J
    Esposito, L S
    Giacomelli, G
    Giorgini, M
    Giglietto, N
    Maaroufi, F
    Mandrioli, G
    Margiotta, A
    Manzoor, S
    Patrizii, L
    Popa, V
    Sioli, M
    Sirri, G
    Spurio, M
    Togo, V
    Time correlations of high energy muons in an underground detector2005In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 23, no 3, p. 341-348Article in journal (Refereed)
    Abstract [en]

    We present the result of a search for correlations in the arrival times of high energy muons collected from 1995 till 2000 with the streamer tube system of the complete MACRO detector at the underground Gran Sasso Lab. Large samples of single muons (8.6 million), double muons (0.46 million) and multiple muons with multiplicities from 3 to 6 (0.08 million) were selected. These samples were used to search for time correlations of cosmic ray particles coming from the whole upper hemisphere or from selected space cones. The results of our analyses confirm with high statistics a random arrival time distribution of high energy cosmic rays. (c) 2005 Elsevier B.V. All rights reserved.

  • 153.
    Becherini, Yvonne
    et al.
    University of Bologna, Italy ; INFN Bologna, Italy.
    Cecchini, S
    University of Bologna, Italy ; INAF/IASF Sez. di Bologna, Italy.
    Cozzi, M
    University of Bologna, Italy.
    Dekhissi, H
    University of Bologna, Italy ; University Mohamed 1st, Morocco.
    Derkaoui, J
    University Mohamed 1st, Morocco.
    Giacomelli, G
    University of Bologna, Italy.
    Giorgini, M
    University of Bologna, Italy.
    Maaroufi, F
    University Mohamed 1st, Morocco.
    Mandrioli, G
    University of Bologna, Italy.
    Margiotta, A
    University of Bologna, Italy.
    Manzoor, S
    University of Bologna, Italy ; PRD, PINSTECH, Pakistan.
    Moussa, A
    University Mohamed 1st, Morocco.
    Patrizii, L
    University of Bologna, Italy.
    Popa, V
    University of Bologna, Italy ; ISS, Romania.
    Sioli, M
    University of Bologna, Italy.
    Sirri, G
    University of Bologna, Italy.
    Spurio, M
    University of Bologna, Italy.
    Togo, V
    University of Bologna, Italy.
    Time variations in the deep underground muon flux measured by MACRO2005In: 29th International Cosmic Ray Conference: August 3 - 10, 2005, Pune, India, Mumbai: Tata Institute of Fundamental Research , 2005, p. 157-160Conference paper (Other academic)
    Abstract [en]

    More than 30 million high-energy muons collected with the MACRO detector at the underground Gran Sasso Laboratory have been used to search for flux variations of different nature. Two kinds of studies were carried out: search for periodical variations and for the occurrence of clusters of events. Different analysis methods, including Lomb-Scargle spectral analysis and scan statistics have been applied to the data.

  • 154.
    Becherini, Yvonne
    et al.
    University of Bologna.
    Collaboration, A. N. T. A. R. E. S.
    Status report of the ANTARES experiment2006In: Taup 2005: Proceedings of the Ninth International Conference on Topics in Astroparticle and Underground Physics, 2006, p. 444-446Conference paper (Refereed)
    Abstract [en]

    The ANTARES Collaboration is building an underwater neutrino telescope in the Mediterranean sea. The telescope is designed to search for high energy (E > I TeV) galactic and extra-galactic neutrino sources, but could also be sensitive to neutrinos originating from the decay of neutralino and exotic particles. The detector is a 3-dimensional array of photomultipliers located at a depth of 2500 m, 40 km from the La Seyne sur Mer shore (near Toulon, France). During the year 2005 a full scale test line and an instrumented line have been successfully operated. In the winter '05-'06 the first full 480 m line will be deployed and connected to the shore station.

  • 155.
    Becherini, Yvonne
    et al.
    Paris Diderot University, France ; École Polytechnique, France.
    Djannati-Atai, A.
    Paris Diderot University, France.
    Marandon, V.
    Paris Diderot University, France.
    Punch, Michael
    Paris Diderot University, France.
    Pita, S.
    Paris Diderot University, France.
    A new analysis strategy for detection of faint gamma-ray sources with Imaging Atmospheric Cherenkov Telescopes2011In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 34, no 12, p. 858-870Article in journal (Refereed)
    Abstract [en]

    A new background rejection strategy for gamma-ray astrophysics with stereoscopic Imaging Atmospheric Cherenkov Telescopes (IACT), based on Monte Carlo (MC) simulations and real background data from the H.E.S.S. [High Energy Stereoscopic System, see [1].] experiment, is described. The analysis is based on a multivariate combination of both previously-known and newly-derived discriminant variables using the physical shower properties, as well as its multiple images, for a total of eight variables. Two of these new variables are defined thanks to a new energy evaluation procedure, which is also presented here. The method allows an enhanced sensitivity with the current generation of ground-based Cherenkov telescopes to be achieved, and at the same time its main features of rapidity and flexibility allow an easy generalization to any type of IACT. The robustness against Night Sky Background (NSB) variations of this approach is tested with MC simulated events. The overall consistency of the analysis chain has been checked by comparison of the real gamma-ray signal obtained from H.E.S.S. observations with MC simulations and through reconstruction of known source spectra. Finally, the performance has been evaluated by application to faint H.E.S.S. sources. The gain in sensitivity as compared to the best standard Hillas analysis ranges approximately from 1.2 to 1.8 depending on the source characteristics, which corresponds to an economy in observation time of a factor 1.4 to 3.2. (C) 2011 Elsevier B.V. All rights reserved.

  • 156.
    Becherini, Yvonne
    et al.
    University of Paris Diderot.
    Djannati-Atai, A.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Bernloehr, K.
    Ehlert, S.
    Masbou, J.
    Moulin, E.
    Arribas, M. Paz
    HESS-II reconstruction strategy and performance in the low-energy (20-150 GeV) domain2009In: HIGH ENERGY GAMMA-RAY ASTRONOMY / [ed] Aharonian, FA; Hofmann, W; Rieger, FM, American Institute of Physics (AIP), 2009, p. 738-741Conference paper (Refereed)
    Abstract [en]

    In mid-2009 a notable upgrade of the H.E.S.S. telescope system will take place: a new telescope with a 600 m(2) mirror area and very-high-resolution camera (0.07 degrees) will be positioned at the centre of the present configuration, with the aim of lowering the threshold and enhance its sensitivity in the 100 GeV to several TeV energy range. HESS-II will permit the investigation of the lower energy gamma-ray spectra in various cosmic accelerators, giving information on the origin of the gamma-rays observed, and will detect AGNs with a redshift greater than 0.2 (being less affected by absorption by Extragalactic Background Light - EBL - in this energy range) and will search for new classes of very high energy gamma-ray emitters (pulsars, microquasars, GRB, and dark matter candidates).

  • 157.
    Becherini, Yvonne
    et al.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Farnier, Christian
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Stockholms universitet.
    Prokhorov, Dmitry
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Punch, Michael
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Université Paris Diderot, France.
    Abbott, B. P.
    LIGO, California Institute of Technology, USA.
    Abbott, R.
    LIGO, California Institute of Technology, USA.
    Abbott, T. D.
    Louisiana State University, USA.
    Acernese, F.
    Università di Salerno, Italy;INFN, Italy.
    Ackley, K.
    University of Florida, USA;OzGrav, Australia.
    Adams, C.
    LIGO Livingston Observatory, USA.
    Multi-messenger Observations of a Binary Neutron Star Merger2017In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 48, no 2, article id L12Article in journal (Refereed)
    Abstract [en]

    On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of similar to 1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg(2) at a luminosity distance of 40(-8)(+8) Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 M-circle dot. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at similar to 40 Mpc) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over similar to 10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position similar to 9 and similar to 16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta.

  • 158.
    Becherini, Yvonne
    et al.
    University of Paris Diderot .
    Khelifi, B.
    Pita, S.
    Punch, Michael
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Advanced analysis and event reconstruction for the CTA Observatory2012In: HIGH ENERGY GAMMA-RAY ASTRONOMY, American Institute of Physics (AIP), 2012, p. 769-772Conference paper (Refereed)
    Abstract [en]

    The planned Cherenkov Telescope Array (CTA) is a future observatory for very-high-energy (VHE) gamma-ray astronomy composed of one site per hemisphere [1]. It aims at 10 times better sensitivity, a better angular resolution and wider energy coverage than current installations such as H.E.S.S., MAGIC and VERITAS. In order to achieve this level of performance, both the design of the telescopes and the analysis algorithms are being studied and optimized within the CTA Monte-Carlo working group. Here, we present ongoing work on the data analysis for both the event reconstruction (energy, direction) and gamma/hadron separation, carried out within the HAP (H.E.S.S. Analysis Package) software framework of the H.E.S.S. collaboration, for this initial study. The event reconstruction uses both Hillas-parameter-based algorithms and an improved version of the 3D-Model algorithm [2]. For the gamma/hadron discrimination, original and robust discriminant variables are used and treated with Boosted Decision Trees (BDTs) in the TMVA [3] (Toolkit for Multivariate Data Analysis) framework. With this advanced analysis, known as Paris-MVA [4], the sensitivity is improved by a factor of similar to 2 in the core range of CTA relative to the standard analyses. Here we present the algorithms used for the reconstruction and discrimination, together with the resulting performance characteristics, with good confidence, since the method has been successfully applied for H.E.S.S.

  • 159. Becherini, Yvonne
    et al.
    Margiotta, A
    Sioli, M
    Spurio, M
    A parameterisation of single and multiple muons in the deep water or ice2006In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 25, no 1, p. 1-13Article in journal (Refereed)
    Abstract [en]

    Atmospheric muons play an important role in underwater/ice neutrino detectors. In this paper, a parameterisation of the flux of single and multiple muon events, their lateral distribution and of their energy spectrum is presented. The kinematics parameters were modelled starting from a full Monte Carlo simulation of the interaction of primary cosmic rays with atmospheric nuclei; secondary muons reaching the sea level were propagated in the deep water. The parametric formulas are valid for a vertical depth of 1.5-5 km.w.e. and lip to 85 degrees for the zenith angle, and can be used as input for a fast simulation of atmospheric muons in underwater/ice detectors. (c) 2005 Elsevier B.V. All rights reserved.

  • 160.
    Becherini, Yvonne
    et al.
    Ecole Polytechnique.
    Punch, Michael
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Performance of HESS-II in multi-telescope mode with a multi-variate analysis2012In: High energy gamma-ray astronomy, American Institute of Physics (AIP), 2012, p. 741-744Conference paper (Refereed)
    Abstract [en]

    The second phase of H. E. S. S. is being commissioned and will start physics data-taking in Autumn 2012. The 4-telescope configuration is now enriched with a new very-large Cherenkov telescope (VLCT) at the centre of the array. The similar to 600m(2) mirror area and high-resolution camera of the VLCT will permit to lower the energy threshold to about 30GeV in the single-telescope mode, opening a new observational window to a large number of new high-energy phenomena. Adding the VLCT also enhances the detection sensitivity in the multi-telescope mode. The performance in this latter data-taking mode of HESS-II with the advanced analysis procedure called Paris-MVA has been studied in order to understand the achievable low-energy sensitivity and preliminary results are shown here. The Monte Carlo (MC) simulations, the gamma-ray reconstruction procedures and the analysis strategy used to obtain the resulting improvement in sensitivity by adding the VLCT - of about a factor of similar to 2 at low energy - will be discussed.

  • 161.
    Becherini, Yvonne
    et al.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Thoudam, Satyendra
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Punch, Michael
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Paris Diderot University, France.
    Ernenwein, Jean-Pierre
    Aix-Marseille University, France.
    Very-High-Energy gamma-ray astronomy with the ALTO observatory2018In: 35th International Cosmic Ray Conference;ICRC2017, Busan, Korea, July 10-20, 2017, Trieste: Sissa Medialab , 2018, article id 782Conference paper (Refereed)
    Abstract [en]

    ALTO is a concept/project in the exploratory phase since 2013 aiming to build a wide-field Very-High-Energy gamma-ray observatory at very high altitude in the Southern hemisphere. The operation of such an observatory will complement the Northern hemisphere observations performed by HAWC and will make possible the exploration of the central region of our Galaxy and the hunt for PeVatrons, and to search for extended Galactic objects such as the Vela Supernova Remnant and the Fermi bubbles. 

    The ALTO project is aiming for a substantial improvement of the Water Cherenkov Detection Technique by increasing the altitude of the observatory in order to lower the energy threshold, by using a layer of scintillator below the water tank to optimize the signal over background discrimination, by minimizing the size of the tanks and having a more compact array to sample the air-shower footprints with better precision, and by using precise electronics which will provide time-stamped waveforms to improve the angular and energy resolution. ALTO is designed to have as low an energy threshold as possible so as to act as a fast trigger alert to other observatories -- primarily to the Southern part of CTA -- for transient Galactic and extra-galactic phenomena. 

    The wide field-of-view resulting from the detection technique allows the survey of a large portion of the sky continuously, thus giving the possibility to access emission from Gamma-Ray Bursts, Active Galactic Nuclei and X-ray binary flares, and extended emissions of both Galactic (Vela SNR, Fermi bubbles) and extra-galactic (AGN radio lobes) origin. The ALTO observatory will be composed of about a thousand detection units, each of which consists of a Water Cherenkov Detector positioned above a liquid Scintillation Detector, distributed within an area of about 200 m in diameter. The project is in the design study phase which is soon to be followed by a prototyping phase. The ALTO concept, design study and expected sensitivity together with the prototype status and plans for final deployment in the Southern hemisphere will be the subjects of this presentation.

  • 162. Bernloehr, K.
    et al.
    Barnacka, A.
    Becherini, Yvonne
    Ecole Polytechnique.
    Blanch Bigas, O.
    Carmona, E.
    Colin, P.
    Decerprit, G.
    Di Pierro, F.
    Dubois, F.
    Farnier, C.
    Funk, S.
    Hermann, G.
    Hinton, J. A.
    Humensky, T. B.
    Khelifi, B.
    Kihm, T.
    Komin, N.
    Lenain, J-P
    Maier, G.
    Mazin, D.
    Medina, M. C.
    Moralejo, A.
    Nolan, S. J.
    Ohm, S.
    Wilhelmi, E. de Ona
    Parsons, R. D.
    Arribas, M. Paz
    Pedaletti, G.
    Pita, S.
    Prokoph, Heike
    Rulten, C. B.
    Schwanke, U.
    Shayduk, M.
    Stamatescu, V.
    Vallania, P.
    Vorobiov, S.
    Wischnewski, R.
    Yoshikoshi, T.
    Zech, A.
    Monte Carlo design studies for the Cherenkov Telescope Array2013In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 43, p. 171-188Article in journal (Refereed)
    Abstract [en]

    The Cherenkov Telescopes Array (CTA) is planned as the future instrument for very-high-energy (VHE) gamma-ray astronomy with a wide energy range of four orders of magnitude and an improvement in sensitivity compared to current instruments of about an order of magnitude. Monte Carlo simulations are a crucial tool in the design of CTA. The ultimate goal of these simulations is to find the most cost-effective solution for given physics goals and thus sensitivity goals or to find, for a given cost, the solution best suited for different types of targets with CTA. Apart from uncertain component cost estimates, the main problem in this procedure is the dependence on a huge number of configuration parameters, both in specifications of individual telescope types and in the array layout. This is addressed by simulation of a huge array intended as a superset of many different realistic array layouts, and also by simulation of array subsets for different telescope parameters. Different analysis methods - in use with current installations and extended (or developed specifically) for CTA - are applied to the simulated data sets for deriving the expected sensitivity of CTA. In this paper we describe the current status of this iterative approach to optimize the CTA design and layout. (C) 2012 Elsevier B.V. All rights reserved.

  • 163. Biteau, J.
    et al.
    Becherini, Yvonne
    Ecole Polytech.
    Sanchez, D. A.
    Perkins, J. S.
    H.E.S.S Collaboration,
    The detection at high and very high energies of the blazar 1ES 1312-4232012In: HIGH ENERGY GAMMA-RAY ASTRONOMY, American Institute of Physics (AIP), 2012, p. 506-509Conference paper (Refereed)
    Abstract [en]

    The deep observation campaign led on Centaurus A with the High Energy Stereoscopic System (H. E. S. S.) has revealed a significant very high energy (VHE, E >= 100 GeV) excess coincident with the blazar 1ES 1312-423, 2 degrees away from the radio galaxy. The source is also detected at high energy (HE, 20 MeV - 300 GeV) with the Fermi Large Area Telescope (Fermi-LAT) after 3.5 years of all-sky monitoring. The high and very high energy spectra, together with Swift-XRT and ATOM observations are used to draw the first broad band spectral energy distribution (SED) of 1ES 1312-423. The non-thermal emission of this faint HBL is reproduced with a synchrotron self-Compton (SSC) model combined with a black-body spectrum for the host galaxy.

  • 164. Collaboration, H. E. S. S.
    et al.
    Abramowski, A.
    Aharonian, F.
    Benkhali, F. Ait
    Akhperjanian, A. G.
    Anguener, E.
    Anton, G.
    Balenderan, S.
    Balzer, A.
    Barnacka, A.
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Tjus, J. Becker
    Bernloehr, K.
    Birsin, E.
    Bissaldi, E.
    Biteau, J.
    Boettcher, M.
    Boisson, C.
    Bolmont, J.
    Bordas, P.
    Brucker, J.
    Brun, F.
    Brun, P.
    Bulik, T.
    Carrigan, S.
    Casanova, S.
    Cerruti, M.
    Chadwick, P. M.
    Chalme-Calvet, R.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chretien, M.
    Colafrancesco, S.
    Cologna, G.
    Conrad, J.
    Couturier, C.
    Cui, Y.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    de Wilt, P.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubus, G.
    Dutson, K.
    Dyks, J.
    Dyrda, M.
    Edwards, T.
    Egberts, K.
    Eger, P.
    Espigat, P.
    Farnier, C.
    Fegan, S.
    Feinstein, F.
    Fernandes, M. V.
    Fernandez, D.
    Fiasson, A.
    Fontaine, G.
    Foerster, A.
    Fuessling, M.
    Gajdus, M.
    Gallant, Y. A.
    Garrigoux, T.
    Giavitto, G.
    Giebels, B.
    Glicenstein, J. F.
    Grondin, M. -H
    Grudzinska, M.
    Haeffner, S.
    Hahn, J.
    Harris, J.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hervet, O.
    Hillert, A.
    Hinton, J. A.
    Hofmann, W.
    Hofverberg, P.
    Holler, M.
    Horns, D.
    Jacholkowska, A.
    Jahn, C.
    Jamrozy, M.
    Janiak, M.
    Jankowsky, F.
    Jung, I.
    Kastendieck, M. A.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Khelifi, B.
    Kieffer, M.
    Klepser, S.
    Klochkov, D.
    Kluzniak, W.
    Kneiske, T.
    Kolitzus, D.
    Komin, Nu.
    Kosack, K.
    Krakau, S.
    Krayzel, F.
    Krueger, P. P.
    Laffon, H.
    Lamanna, G.
    Lefaucheur, J.
    Lemiere, A.
    Lemoine-Goumard, M.
    Lenain, J. -P
    Lennarz, D.
    Lohse, T.
    Lopatin, A.
    Lu, C. -C
    Marandon, V.
    Marcowith, A.
    Marx, R.
    Maurin, G.
    Maxted, N.
    Mayer, M.
    McComb, T. J. L.
    Mehault, J.
    Meintjes, P. J.
    Menzler, U.
    Meyer, M.
    Moderski, R.
    Mohamed, M.
    Moulin, E.
    Murach, T.
    Naumann, C. L.
    de Naurois, M.
    Niemiec, J.
    Nolan, S. J.
    Oakes, L.
    Ohm, S.
    Wilhelmi, E. de Ona
    Opitz, B.
    Ostrowski, M.
    Oya, I.
    Panter, M.
    Parsons, R. D.
    Arribas, M. Paz
    Pekeur, N. W.
    Pelletier, G.
    Perez, J.
    Petrucci, P. -O
    Peyaud, B.
    Pita, S.
    Poon, H.
    Puehlhofer, G.
    Punch, Michael
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raab, S.
    Raue, M.
    Reimer, A.
    Reimer, O.
    Renaud, M.
    de los Reyes, R.
    Rieger, F.
    Rob, L.
    Romoli, C.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Sahakian, V.
    Sanchez, D. A.
    Santangelo, A.
    Schlickeiser, R.
    Schuessler, F.
    Schulz, A.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Sol, H.
    Spengler, G.
    Spies, F.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Stinzing, F.
    Stycz, K.
    Sushch, I.
    Szostek, A.
    Tavernet, J. -P
    Tavernier, T.
    Taylor, A. M.
    Terrier, R.
    Tluczykont, M.
    Trichard, C.
    Valerius, K.
    van Eldik, C.
    van Soelen, B.
    Vasileiadis, G.
    Venter, C.
    Viana, A.
    Vincent, P.
    Voelk, H. J.
    Volpe, F.
    Vorster, M.
    Vuillaume, T.
    Wagner, S. J.
    Wagner, P.
    Ward, M.
    Weidinger, M.
    Weitzel, Q.
    White, R.
    Wierzcholska, A.
    Willmann, P.
    Woernlein, A.
    Wouters, D.
    Zabalza, V.
    Zacharias, M.
    Zajczyk, A.
    Zdziarski, A. A.
    Zech, A.
    Zechlin, H. -S
    HESS observations of the Crab during its March 2013 GeV gamma-ray flare2014In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 562, p. Article ID: UNSP L4-Article in journal (Refereed)
    Abstract [en]

    Context. On March 4, 2013 the Fermi-EAT and AGILE reported a flare from the direction of the Crab nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its quiescent level. Simultaneous observations in other energy bands give us hints about the emission processes during the flare episode and the physics of pulsar wind nebulae in general. Aims. We search for variability in the emission of the Crab nebula at very-high energies (VHF,; E > 100 GeV), using contemporaneous data taken with the H.E.S.S. array of Cherenkov telescopes. Methods. Observational data taken with the H.E.S.S. instrument on five consecutive days during the flare were analysed for the flux and spectral shape of the emission from the Crab nebula. Night-wise light curves are presented with energy thresholds of 1 TeV and 5 TeV. Results. The observations conducted with H.E.S.S. on March 6 to March 10, 2013 show no significant changes in the flux. They limit the variation in the integral flux above 1 TeV to less than 63% and the integral flux above 5 TeV to less than 78% at a 95% confidence level.

  • 165. IceCube Collaboration, Group Authors
    et al.
    Fermi-LAT Collaboration, Group Authors
    MAGIC Collaboration, Group Authors
    AGILE, Group Authors
    ASAS-SN, Group Authors
    HAWC, Group Authors
    HESS, Group Authors
    INTEGRAL, Group Authors
    Kanata, Group Authors
    Kiso Subaru Observing Te, Group Authors
    Kapteyn, Group Authors
    Liverpool Telescope, Group Authors
    Swift NuSTAR, Group Authors
    VERITAS, Group Authors
    VLA 17B-403 Team, Group Authors
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A2018In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 361, no 146, p. 1-8, article id eaat1378Article in journal (Refereed)
    Abstract [en]

    Previous detections of individual astrophysical sources of neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of high-energy cosmic neutrinos remain unidentified. On 22 September 2017, we detected a high-energy neutrino, IceCube-170922A, with an energy of ~290 tera–electronvolts. Its arrival direction was consistent with the location of a known γ-ray blazar, TXS 0506+056, observed to be in a flaring state. An extensive multiwavelength campaign followed, ranging from radio frequencies to γ-rays. These observations characterize the variability and energetics of the blazar and include the detection of TXS 0506+056 in very-high-energy γ-rays. This observation of a neutrino in spatial coincidence with a γ-ray–emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.

  • 166.
    Petroff, E.
    et al.
    The Netherlands Institute for Radio Astronomy, Netherlands ; Swinburne University of Technology, Australia ; Australia Telescope National Facility, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Burke-Spolaor, S.
    National Radio Astronomy Observatory, USA ; West Virginia University, USA.
    Keane, E. F.
    Jodrell Bank Observatory, UK ; Swinburne University of Technology, Australia.
    McLaughlin, M. A.
    West Virginia University, USA.
    Miller, R.
    West Virginia University, USA.
    Andreoni, I.
    Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia ; Australian Astronomical Observatory, Australia.
    Bailes, M.
    Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Barr, E. D.
    Swinburne Univ Technol, Australia ; ARC Ctr Excellence All Sky Astrophys CAASTRO, Australia ; Max Planck Inst Radioastron, Germany.
    Bernard, S. R.
    Max Planck Institute for Radio Astronomy, Germany ; Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Bhandari, S.
    University of Melbourne, Australia ; Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Bhat, N. D. R.
    ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia.;Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia..
    Burgay, M.
    INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy..
    Caleb, M.
    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia.;ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia.;Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia..
    Champion, D.
    Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany..
    Chandra, P.
    Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune Univ Campus, Pune 411007, Maharashtra, India..
    Cooke, J.
    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia..
    Dhillon, V. S.
    Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, UK;Inst Astrofis Canarias, E-38205 Tenerife, Spain..
    Farnes, J. S.
    Radboud Univ Nijmegen, Dept Astrophys IMAPP, POB 9010, NL-6500 GL Nijmegen, Netherlands..
    Hardy, L. K.
    Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, UK.
    Jaroenjittichai, P.
    Natl Astron Res Inst Thailand, 191 Siriphanich Bldg,Huay Kaew Rd, Chiang Mai 50200, Thailand..
    Johnston, S.
    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia..
    Kasliwal, M.
    CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA..
    Kramer, M.
    Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany.;Univ Manchester, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, UK.
    Littlefair, S. P.
    Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, UK.
    Macquart, J. P.
    Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia..
    Mickaliger, M.
    Univ Manchester, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, UK.
    Possenti, A.
    INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy..
    Pritchard, T.
    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia..
    Ravi, V.
    CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA..
    Rest, A.
    Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA..
    Rowlinson, A.
    Netherlands Inst Radio Astron, ASTRON, Postbus 2, NL-7990 AA Dwingeloo, Netherlands.;Univ Amsterdam, Aston Pannekoek Inst, Postbus NL 94249, NL-1090 GE Amsterdam, Netherlands..
    Sawangwit, U.
    Natl Astron Res Inst Thailand, 191 Siriphanich Bldg,Huay Kaew Rd, Chiang Mai 50200, Thailand..
    Stappers, B.
    Univ Manchester, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, UK.
    Sullivan, M.
    Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, UK.
    Tiburzi, C.
    Univ Bielefeld, Fak Phys, Postfach 100131, D-33501 Bielefeld, Germany..
    van Straten, W.
    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia.;Auckland Univ Technol, Inst Radio Astron & Space Res, Private Bag 92006, Auckland 1142, New Zealand..
    Albert, A.
    Univ Haute Alsace, GRPHE, Inst Univ Technol Colmar, 34 Rue Grillenbreit BP F 68008, F-68008 Colmar, France..
    Andre, M.
    Tech Univ Catalonia, Lab Appl Bioacoust, Rambla Exposicio, E-08800 Barcelona, Spain..
    Anghinolfi, M.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Anton, G.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Ardid, M.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Aubert, J. -J
    Avgitas, T.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Baret, B.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Barrios-Marti, J.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Basa, S.
    Pole Etoile Site Chateau Gombert, LAM, Rue Frederic Joliot Curie 38, F-13388 Marseille 13, France..
    Bertin, V.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Biagi, S.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Borrnuth, R.
    Nikhef, Sci Pk, Amsterdam, Netherlands.;Leiden Univ, Huygens Karnerlingh Onnes Lab, Leiden, Netherlands..
    Bourret, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Bouwhuis, M. C.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Bruijn, R.
    Univ Amsterdam, Aston Pannekoek Inst, Postbus NL 94249, NL-1090 GE Amsterdam, Netherlands.;Nikhef, Sci Pk, Amsterdam, Netherlands..
    Brunner, J.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Busto, J.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Capone, A.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Caramete, L.
    Inst Space Sci, RO-077125 Bucharest, Magurele, Romania..
    Carr, J.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Celli, S.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Chiarusi, T.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Circella, M.
    Ist Nazl Fis Nucl, Sez Bari, Via E Orabona 4, I-70126 Bari, Italy..
    Coelho, J. A. B.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Coleiro, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Coniglione, R.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Costantini, H.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Coyle, P.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Creusot, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Deschamps, A.
    UCA, Geoazur, CNRS, Observ Cote Azur,IRD, Sophia Antipolis, France..
    De Bonis, G.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Distefano, C.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Di Palma, I.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Donzaud, C.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;Univ Paris 11, F-91405 Orsay, France..
    Dornic, D.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Drouhin, D.
    Univ Haute Alsace, GRPHE, Inst Univ Technol Colmar, 34 Rue Grillenbreit BP F 68008, F-68008 Colmar, France..
    Eberl, T.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    El Bojaddaini, I.
    Univ Mohammed 1, Lab Phys Matter & Radiat, BP 7I7, Oujda 6000, Morocco..
    Elsasser, D.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Enzenhofer, A.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Felis, I.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Fusco, L. A.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Galata, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Gay, P.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;Univ Blaise Pascal, Clermont Univ, Phys Corpusculaire Lab, CNRS IN2P3, BP 10448, F-63000 Clermont Ferrand, France..
    Geisselsoder, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Geyer, K.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Giordano, V.
    Ist Nazl Fis Nucl, Sez Catania, Viale Andrea Doria 6, I-95125 Catania, Italy..
    Gleixner, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Glotin, H.
    Aix Marseille Univ, LSIS, CNRS, ENSAM,LSIS,UMR 7296, F-13397 Marseille, France.;Univ Toulon & Var, CNRS, LSIS, UMR 7296, F-83957 La Garde, France.;Inst Univ France, E-75005 Paris, France..
    Gregoire, T.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Gracia-Ruiz, R.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Graf, K.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Hallmann, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Haren, H.
    Royal Netherlands Inst Sea Res NIOZ, Landsdiep 4, NL-1797 SZ Thorntje, Texel, Netherlands..
    Heijboer, A. J.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Hello, Y.
    UCA, Geoazur, CNRS, Observ Cote Azur,IRD, Sophia Antipolis, France..
    Hernandez-Rey, J. J.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Hossl, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Hofestadt, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Hugon, C.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy.;Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Illuminati, G.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain.;Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    James, C. W. C. W.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    de Jong, M.
    Nikhef, Sci Pk, Amsterdam, Netherlands.;Leiden Univ, Huygens Karnerlingh Onnes Lab, Leiden, Netherlands..
    Jongen, M.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Kadler, M.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Kalekin, O.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kiessling, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kouchner, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Kreter, M.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Kreykenbohm, I.
    Univ Erlangen Nurnberg, Dr Remeis Stemwarte & ECAP, Sternwartstr 7, D-96049 Bamberg, Germany..
    Kulikovskiy, V.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France.;Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Leninskie Gory, Moscow 119991, Russia..
    Lachaud, C.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Lahmann, R.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Lefevre, D.
    Aix Marseille Univ, MIO, F-13288 Marseille 9, France.;Univ Sud Toulon Var, F-83957 La Garde, France.;CNRS INSU IRD UM 110, Paris, France..
    Leonora, E.
    Ist Nazl Fis Nucl, Sez Catania, Viale Andrea Doria 6, I-95125 Catania, Italy.;Univ Catania, Dipartimento Fis & Astron, Viale Andrea Doria 6, I-95125 Catania, Italy..
    Lotze, M.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Loucatos, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Marcelin, M.
    Pole Etoile Site Chateau Gombert, LAM, Rue Frederic Joliot Curie 38, F-13388 Marseille 13, France..
    Margiotta, A.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Marinelli, A.
    Ist Nazl Fis Nucl, Sez Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy.;Univ Pisa, Dipartimento Fis, Largo B Pontecorvo 3, I-56127 Pisa, Italy..
    Martinez-Mora, J. A.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Mathieu, A.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Mele, R.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy.;Univ Naples Federico II, Dipartimento Fis, Via Cintia, I-80126 Naples, Italy..
    Melis, K.
    Univ Amsterdam, Aston Pannekoek Inst, Postbus NL 94249, NL-1090 GE Amsterdam, Netherlands.;Nikhef, Sci Pk, Amsterdam, Netherlands..
    Michael, T.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Migliozzi, P.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy..
    Moussa, A.
    Univ Mohammed 1, Lab Phys Matter & Radiat, BP 7I7, Oujda 6000, Morocco..
    Mueller, C.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Nezri, E.
    Pole Etoile Site Chateau Gombert, LAM, Rue Frederic Joliot Curie 38, F-13388 Marseille 13, France..
    Pavalas, G. E.
    Inst Space Sci, RO-077125 Bucharest, Magurele, Romania..
    Pellegrino, C.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Perrina, C.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Piattelli, P.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Popa, V.
    Inst Space Sci, RO-077125 Bucharest, Magurele, Romania..
    Pradier, T.
    Univ Strasbourg, IPHC, 23 Rue Loess, F-67037 Strasbourg, France.;CNRS, UMR7178, F-67037 Strasbourg, France..
    Quinn, L.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Racca, C.
    Univ Haute Alsace, GRPHE, Inst Univ Technol Colmar, 34 Rue Grillenbreit BP F 68008, F-68008 Colmar, France..
    Riccobene, G.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Roensch, K.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Sanchez-Losa, A.
    Ist Nazl Fis Nucl, Sez Bari, Via E Orabona 4, I-70126 Bari, Italy..
    Saldana, M.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Salvadori, I.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Samtleben, D. F. E.
    Nikhef, Sci Pk, Amsterdam, Netherlands.;Leiden Univ, Huygens Karnerlingh Onnes Lab, Leiden, Netherlands..
    Sanguineti, M.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy.;Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Sapienza, P.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Schnabel, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Seitz, T.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Sieger, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spurio, M.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Stolarczyk, Th.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Taiuti, M.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy.;Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Tayalati, Y.
    Univ Mohammed Rabat, Fac Sci, 4 Av Ibn Battouta,BP 1014,RP 10000, Rabat, Morocco..
    Trovato, A.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Tselengidou, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Turpin, D.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Tonnis, C.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Vallage, B.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Vallee, C.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Van Elewyck, V.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Vivolo, D.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy.;Univ Naples Federico II, Dipartimento Fis, Via Cintia, I-80126 Naples, Italy..
    Vizzoca, A.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Wagner, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Wilms, J.
    Univ Erlangen Nurnberg, Dr Remeis Stemwarte & ECAP, Sternwartstr 7, D-96049 Bamberg, Germany..
    Zornoza, J. D.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Zuniga, J.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Abdalla, H.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Abramowski, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.;Nikhef, Sci Pk, Amsterdam, Netherlands.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany.;Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Aharonian, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia..
    Benkhali, F. Ait
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Akhperjanian, A. G.
    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Andersson, T.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Anguner, E. O.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Arrieta, M.
    Univ Paris Diderot, PSLRes Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Aubert, P.
    Univ Savoie Mt Blanc, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France..
    Backes, M.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Balzer, A.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Barnard, M.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Tjus, J. Becker
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Berge, D.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Bernhard, S.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Bernlohr, K.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Blackwell, R.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Bottcher, M.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Boisson, C.
    Univ Paris Diderot, PSLRes Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Bolmont, J.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Bordas, P.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Bregeon, J.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    Brun, F.
    Univ Bordeaux, CNRS IN2P3, Ctr Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Brun, P.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Bryan, M.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Bulik, T.
    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
    Capasso, M.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Casanova, S.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Cerruti, M.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Chakraborty, N.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Chalme-Calvet, R.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Chaves, R. C. G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    Chen, A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Chevalier, J.
    Univ Savoie Mt Blanc, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France..
    Chretien, M.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Colafrancesco, S.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Cologna, G.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Condon, B.
    Univ Bordeaux, CNRS IN2P3, Ctr Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Conrad, J.
    Stockholm Univ, Albanova Univ Ctr, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden..
    Cui, Y.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Davids, I. D.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Decock, J.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Degrange, B.
    Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France.;CNRS, IPAG, F-38000 Grenoble, France..
    Deil, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Devin, J.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    de Wilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Dirson, L.
    Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Domainko, W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Donath, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Drury, L. O 'C.
    Dubus, G.
    Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France.;CNRS, IPAG, F-38000 Grenoble, France..
    Dutson, K.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, UK.
    Dyks, J.
    Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Edwards, T.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Eger, P.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Ernenwein, J. -P
    Eschbach, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Farnier, Christian
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Stockholm University.
    Fegan, S.
    Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France..
    Fernandes, M. V.
    Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Fiasson, A.
    Univ Savoie Mt Blanc, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France..
    Fontaine, G.
    Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France..
    Forster, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fussling, M.
    DESY, D-15738 Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Gajdus, M.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Gallant, Y. A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    Garrigoux, T.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Giavitto, G.
    DESY, D-15738 Zeuthen, Germany..
    Giebels, B.
    Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France..
    Glicenstein, J. F.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Goya, A.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Grondin, M. -H
    Hadasch, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Hahn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Haupt, M.
    DESY, D-15738 Zeuthen, Germany..
    Hawkes, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Heinzelmann, G.
    Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France.;CNRS, IPAG, F-38000 Grenoble, France..
    Prokhorov, Dmitry
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Prokoph, Heike
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Punch, Michael
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Univ Paris Diderot, France.
    A polarized fast radio burst at low Galactic latitude2017In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 469, no 4, p. 4465-4482Article in journal (Refereed)
    Abstract [en]

    We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 +/- 0.8 pc cm(-3), a pulse duration of 2.8(-0.5)(+1.2) ms, and a measured peak flux density assuming that the burst was at beam centre of 0.7(-0.1)(+0.2) Jy. The FRB originated at a Galactic longitude and latitude of 24.66 degrees, 5.28 degrees and 25 degrees away from the Galactic Center. The burst was found to be 43 +/- 5 per cent linearly polarized with a rotation measure (RM) in the range -9 < RM < 12 rad m(-2) (95 per cent confidence level), consistent with zero. The burst was followed up with 11 telescopes to search for radio, optical, X-ray, gamma-ray and neutrino emission. Neither transient nor variable emission was found to be associated with the burst and no repeat pulses have been observed in 17.25 h of observing. The sightline to the burst is close to the Galactic plane and the observed physical properties of FRB 150215 demonstrate the existence of sight lines of anomalously low RM for a given electron column density. The Galactic RM foreground may approach a null value due to magnetic field reversals along the line of sight, a decreased total electron column density from the Milky Way, or some combination of these effects. A lower Galactic DM contribution might explain why this burst was detectable whereas previous searches at low latitude have had lower detection rates than those out of the plane.

  • 167. Pita, S.
    et al.
    Goldoni, P.
    Boisson, C.
    Becherini, Yvonne
    Gerard, L.
    Lenain, J. -P
    Punch, Michael
    High energy blazars spectroscopy with X-Shooter on the VLT2012In: High energy gamma-ray astronomy, American Institute of Physics (AIP), 2012, p. 566-569Conference paper (Refereed)
    Abstract [en]

    We present results of observations in the UV to near-IR range for eight blazars, three of which have been recently discovered at Very High Energies (VHE) and five appearing as interesting candidates for VHE gamma-ray detection. We focus in this paper on the search for their redshifts, which are unknown or considered as uncertain.

  • 168.
    Prokoph, Heike
    et al.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Böttcher, M.
    North-West University, South Africa.
    Boisson, C.
    Université Paris Diderot, France.
    Lenain, J.-P.
    Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, France.
    Sushch, I.
    North-West University, South Africa.
    Collaboration, for the H. E. S. S.
    H.E.S.S. discovery of very-high-energy gamma-ray emission of PKS 1440-3892015In: Proceedings of Science, SISSA , 2015Conference paper (Other academic)
    Abstract [en]

    Blazars are the most abundant class of known extragalactic very-high-energy (VHE, E>100 GeV) gamma-ray sources. However, one of the biggest difficulties in investigating their VHE emission resides in their limited number, since less than 60 of them are known by now. In this contribution we report on H.E.S.S. observations of the BL Lac object PKS 1440-389. This source has been selected as target for H.E.S.S. based on its high-energy gamma-ray properties measured by Fermi-LAT. The extrapolation of this bright, hard-spectrum gamma-ray blazar into the VHE regime made a detection on a relatively short time scale very likely, despite its uncertain redshift. H.E.S.S. observations were carried out with the 4-telescope array from February to May 2012 and resulted in a clear detection of the source. Contemporaneous multi-wavelength data are used to construct the spectral energy distribution of PKS 1440-389 which can be described by a simple one-zone synchrotron-self Compton model

  • 169. Raue, M.
    et al.
    Lenain, J. -P
    Aharonian, F. A.
    Becherini, Yvonne
    Boisson, C.
    Clapson, A. -C
    Costamante, L.
    Gerard, L.
    Medina, C.
    de Naurois, M.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Rieger, F.
    So, H.
    Stawarz, L.
    Zech, A.
    Discovery of VHE gamma-rays from Centaurus A2010In: Accretion and Ejection in AGN: a Global View / [ed] Maraschi, L; Ghisellini, G; DellaCeca, R; Tavecchio, F, Astronomical Society of the Pacific , 2010, Vol. 427, p. 302-303Conference paper (Other academic)
    Abstract [en]

    Centaurus A is the closest active radio galaxy. Its proximity enables unique studies of the processes in relativistic jets and near supermassive black holes. Centaurus A has been intensively studied in many wavelength bands and has also been discussed as a possible site for UHECR acceleration. Here, we report the discovery of weak very-high energy gamma-ray emission from Centaurus A with the H.E.S.S. Cherenkov telescope array. The discovery of Centaurus A, together with the detection of M 87, establishes radio galaxies - i.e. AGNs with only weak relativistic beaming - as sources of VHE gamma-rays. The implications of these results on the emission site and on the different models available will be discussed.

  • 170. Stamatescu, V.
    et al.
    Becherini, Yvonne
    APC Paris.
    Bernloehr, K.
    Carmona, E.
    Colin, P.
    Farnier, C.
    Gerard, L.
    Hinton, J. A.
    Khelifi, B.
    Komin, N.
    Lamanna, G.
    Lenain, J. -P
    Maier, G.
    Moralejo, A.
    Naumann, C. L.
    Parsons, D.
    Di Pierro, F.
    Prokoph, Heike
    Vorobiov, S.
    Towards an optimized design for the Cherenkov Telescope Array2012In: HIGH ENERGY GAMMA-RAY ASTRONOMY, American Institute of Physics (AIP), 2012, p. 758-761Conference paper (Refereed)
    Abstract [en]

    The Cherenkov Telescope Array (CTA) is a future instrument for very-high-energy (VHE) gamma-ray astronomy that is expected to deliver an order of magnitude improvement in sensitivity over existing instruments. In order to meet the physics goals of CTA in a cost-effective way, Monte Carlo simulations of the telescope array are used in its design. Specifically, we simulate large arrays comprising numerous large-size, medium-size and small-size telescopes whose configuration parameters are chosen based on current technical design studies and understanding of the costs involved. Subset candidate arrays with various layout configurations are then selected and evaluated in terms of key performance parameters, such as the sensitivity. This is carried out using a number of data analysis methods, some of which were developed within the field and extended to CTA, while others were developed specifically for this purpose. We outline some key results from recent studies that illustrate our approach to the optimization of the CTA design.

  • 171.
    Thoudam, Satyendra
    et al.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Punch, Michael
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Simulation study for the proposed wide field-of-view gamma-ray detector array ALTO2018In: Proceedings of Science: 35th International Cosmic Ray Conference, ICRC 2017, 10 -20 July 2017, Bexico, South Korea, Sissa Medialab Srl , 2018Conference paper (Refereed)
    Abstract [en]

    ALTO is a wide field-of-view air shower detector array for very-high-energy (VHE) gamma-ray astronomy, proposed to be installed in the Southern Hemisphere at an altitude of ∼5.1 km above sea level. The array will use water Cherenkov detectors, as in the HAWC observatory, but combined with scintillator detectors, to detect air showers induced by VHE gamma rays in the atmosphere. It is being designed to attain a lower energy threshold, better energy and angular resolution, and improved sensitivity. The array will consist of ∼1250 small-sized (3.6 m diameter) detector units distributed over a circular area of ∼160 m in diameter. Each detector unit will consist of a water Cherenkov detector and a liquid scintillation detector underneath which will preferentially identify muons, facilitating the background (cosmic ray) rejection, thereby improving the sensitivity. The background rejection will be further enhanced by the close-packed arrangement and the small size of the detectors which will allow a fine sampling of air-shower footprints at the ground. In this contribution, we present the Monte-Carlo simulation of the experiment performed using CORSIKA and GEANT4 simulation packages. The expected performance of the array in terms of reconstruction accuracies of the shower core and arrival direction, as well as preliminary estimate of the trigger energy threshold after preliminary selection cuts for a point-like gamma-ray source are presented. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0).

  • 172. Togo, V
    et al.
    Ambrosio, M
    Antolini, R
    Auriemma, G
    Bakari, D
    Baldini, A
    Barbarino, G C
    Barish, B C
    Battistoni, G
    Becherini, Yvonne
    Bellotti, R
    Bemporad, C
    Bernardini, P
    Bilokon, H
    Bloise, C
    Bower, C
    Brigida, M
    Bussino, S
    Cafagna, F
    Campana, D
    Carboni, M
    Caruso, R
    Cecchini, S
    Cei, F
    Chiarella, V
    Chiarusi, T
    Choudhary, B C
    Coutu, S
    Cozzi, M
    De Cataldo, G
    Dekhissi, H
    De Marzo, C
    Erriquez, O
    Favuzzi, C
    Forti, C
    Fusco, P
    Giacomelli, G
    Giannini, G
    Giglietto, N
    Giorgini, M
    Grassi, M
    Grillo, A
    Guarino, F
    Gustavino, C
    Habig, A
    Hanson, K
    Heinz, R
    Iarocci, E
    Katsavounidis, E
    Katsavounidis, I
    Kearns, E
    Kim, H
    Kyriazopoulou, S
    Kumar, A
    Lamanna, E
    Lane, C
    Levin, D S
    Lipari, P
    Longo, M J
    Loparco, F
    Maaroufi, F
    Mancarella, G
    Mandrioli, G
    Manzoor, S
    Margiotta, A
    Marini, A
    Martello, D
    Marzari-Chiesa, A
    Matteuzzi, D
    Michael, D G
    Monacelli, P
    Montaruli, T
    Monteno, M
    Mufson, S
    Musser, J
    Nicolo, D
    Nolty, R
    Orth, C
    Osteria, G
    Palamara, O
    Patera, V
    Patrizii, L
    Pazzi, R
    Peck, C W
    Perrone, L
    Petrera, S
    Pistilli, P
    Popa, V
    Raino, A
    Reynoldson, J
    Ronga, F
    Rrhioua, A
    Satriano, C
    Scapparone, E
    Scholberg, K
    Sciubba, A
    Serra, P
    Sioli, M
    Sirri, G
    Sitta, M
    Spinelli, P
    Spinetti, M
    Spurio, M
    Steinberg, R
    Stone, J L
    Sulak, L R
    Surdo, A
    G, Tarle
    Vakili, M
    Walter, C W
    Webb, R
    Calibrations of CR39 and Makrofol nuclear track detectors and search for exotic particles2003In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 125, p. 217-221Article in journal (Refereed)
    Abstract [en]

    We present the final results of the search for exotic massive particles in the cosmic radiation performed with the MACRO underground experiment. Magnetic monopoles and nuclearites flux upper limits obtained with the CR39 nuclear track subdetector, the scintillation and streamer tube subdetectors are given. Searches at high altitude with the SLIM experiment are in progress.

  • 173. Wouters, Denis
    et al.
    Lenain, Jean-Philippe
    Becherini, Yvonne
    University Paris Diderot.
    Harris, Jon
    Brun, Pierre
    Kaufman, Sarah
    Boisson, Catherine
    Cerruti, Matteo
    Sol, Helene
    Zech, Andreas
    H.E.S.S. Observations of the distant BL Lac PKS 0301-2432012In: HIGH ENERGY GAMMA-RAY ASTRONOMY, American Institute of Physics (AIP), 2012, p. 498-501Conference paper (Refereed)
    Abstract [en]

    PKS 0301-243 is a distant (z=0.266) high-frequency-peaked BL Lac object, detected both at high and very high energies (VHE) with Fermi/LAT and H. E. S. S., and which experienced a flare in May 2010 in the GeV band. H. E. S. S. observations of PKS 0301-243 carried out between September 2009 and December 2011 result in a strong detection of VHE gamma-rays from the source with a significance of 9.8 standard deviations. Multi-wavelength observations from optical to GeV gamma-rays are also presented. The VHE spectrum is used to derive an upper limit on the opacity of the universe to gamma-rays.

1234 151 - 173 of 173
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