Discovery of variable VHE gamma-ray emission from the binary system 1FGL J1018.6-5856

Abramowski, A.; Aharonian, F.; Ait Benkhali, F.; Akhperjanian, A. G.; Angüner, E. O.; Backes, M.; Balzer, A.; Becherini, Yvonne; Becker Tjus, J.; Berge, D.; Bernhard, S.; Bernlöhr, K.; Birsin, E.; Blackwell, R.; Böttcher, M.; Boisson, C.; Bolmont, J.; Bordas, P.; Bregeon, J.; Brun, F.; Brun, P.; Bryan, M.; Bulik, T.; Carr, J.; Casanova, S.; Chakraborty, N.; Chalme-Calvet, R.; Chaves, R. C. G.; Chen, A.; Chrétien, M.; Colafrancesco, S.; Cologna, G.; Conrad, J.; Couturier, C.; Cui, Y.; Davids, I. D.; Degrange, B.; Deil, C.; deWilt, P.; Djannati-Ataï, A.; Domainko, W.; Donath, A.; O’C. Drury, L.; Dubus, G.; Dutson, K.; Dyks, J.; Dyrda, M.; Edwards, T.; Egberts, K.; Eger, P.; Ernenwein, J. -P; Espigat, P.; Farnier, C.; Fegan, S.; Feinstein, F.; Fernandes, M. V.; Fernandez, D.; Fiasson, A.; Fontaine, G.; Förster, A.; Füßling, M.; Gabici, S.; Gajdus, M.; Gallant, Y. A.; Garrigoux, T.; Giavitto, G.; Giebels, B.; Glicenstein, J. F.; Gottschall, D.; Goyal, A.; Grondin, M. -H; Grudzi´nska, M.; Hadasch, D.; Häffner, S.; Hahn, J.; Hawkes, J.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hervet, O.; Hillert, A.; Hinton, J. A.; Hofmann, W.; Hofverberg, P.; Hoischen, C.; Holler, M.; Horns, D.; Ivascenko, A.; Jacholkowska, A.; Jahn, C.; Jamrozy, M.; Janiak, M.; Jankowsky, F.; Jung-Richardt, I.; Kastendieck, M. A.; Katarzy´nski, K.; Katz, U.; Kerszberg, D.; Khélifi, B.; Kieffer, M.; Klepser, S.; Klochkov, D.; Klu´zniak, W.; Kolitzus, D.; Komin, N.; Kosack, K.; Krakau, S.; Krayzel, F.; Krüger, P. P.; Laffon, H.; Lamanna, G.; Lau, J.; Lefaucheur, J.; Lefranc, V.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J. -P; Lohse, T.; Lopatin, A.; Lu, C. -C; Lui, R.; Marandon, V.; Marcowith, A.; Mariaud, C.; Marx, R.; Maurin, G.; Maxted, N.; Mayer, M.; Meintjes, P. J.; Menzler, U.; Meyer, M.; Mitchell, A. M. W.; Moderski, R.; Mohamed, M.; Morå, K.; Moulin, E.; Murach, T.; de Naurois, M.; Niemiec, J.; Oakes, L.; Odaka, H.; Öttl, S.; Ohm, S.; de Oña Wilhelmi, E.; Opitz, B.; Ostrowski, M.; Oya, I.; Panter, M.; Parsons, R. D.; Arribas, M. P.; Pekeur, N. W.; Pelletier, G.; Petrucci, P. -O; Peyaud, B.; Pita, S.; Poon, H.; Prokoph, Heike; Pühlhofer, G.; Punch, Michael; Quirrenbach, A.; Raab, S.; Reichardt, I.; Reimer, A.; Reimer, O.; Renaud, M.; de los Reyes, R.; Rieger, F.; Romoli, C.; Rosier-Lees, S.; Rowell, G.; Rudak, B.; Rulten, C. B.; Sahakian, V.; Salek, D.; Sanchez, D. A.; Santangelo, A.; Sasaki, M.; Schlickeiser, R.; Schüssler, F.; Schulz, A.; Schwanke, U.; Schwemmer, S.; Seyffert, A. S.; Simoni, R.; Sol, H.; Spanier, F.; Spengler, G.; Spies, F.; Stawarz, \L.; Steenkamp, R.; Stegmann, C.; Stinzing, F.; Stycz, K.; Sushch, I.; Tavernet, J. -P; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tluczykont, M.; Trichard, C.; Valerius, K.; van der Walt, J.; van Eldik, C.; van Soelen, B.; Vasileiadis, G.; Veh, J.; Venter, C.; Viana, A.; Vincent, P.; Vink, J.; Voisin, F.; Völk, H. J.; Vuillaume, T.; Wagner, S. J.; Wagner, P.; Wagner, R. M.; Weidinger, M.; Weitzel, Q.; White, R.; Wierzcholska, A.; Willmann, P.; Wörnlein, A.; Wouters, D.; Yang, R.; Zabalza, V.; Zaborov, D.; Zacharias, M.; Zdziarski, A. A.; Zech, A.; Zefi, F.; Zywucka, N.

lnu.sePublications

Simple search

Advanced search -
Research publications Advanced search -
Student theses Statistics

English Svenska Norsk

Change search

Cite ExportLink to record

Permanent link

https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-44648

Direct link

http://lnu.diva-portal.org/smash/record.jsf?pid=diva2:822572

Cite

Citation style

apa
ieee
modern-language-association-8th-edition
vancouver
Other style

More styles

Language

de-DE
en-GB
en-US
fi-FI
nn-NO
nn-NB
sv-SE
Other locale

More languages

Output format

html
text
asciidoc
rtf

Discovery of variable VHE gamma-ray emission from the binary system 1FGL J1018.6-5856

Abramowski, A.

Universität Hamburg, Germany .

Aharonian, F.

Max-Planck-Institut für Kernphysik, Germany ; Dublin Institute for Advanced Studies, Ireland ; National Academy of Sciences of the Republic of Armenia, Armenia .

Ait Benkhali, F.

Max-Planck-Institut für Kernphysik, Germany .

Akhperjanian, A. G.

National Academy of Sciences of the Republic of Armenia, Armenia ; Yerevan Physics Institute, Armenia.

Show others and affiliations

2015 (English)In: Astronomy and Astrophysics Supplement Series, ISSN 0365-0138, E-ISSN 1286-4846, Vol. 577, article id A131Article in journal (Refereed) Published

Abstract [en]

Re-observations with the HESS telescope array of the very high-energy (VHE) source HESS J1018-589 A that is coincident with the Fermi-LAT γ-ray binary 1FGL J1018.6-5856 have resulted in a source detection significance of more than 9σ and the detection of variability (χ$^2$/ν of 238.3/155) in the emitted γ-ray flux. This variability confirms the association of HESS J1018-589 A with the high-energy γ-ray binary detected by Fermi-LAT and also confirms the point-like source as a new VHE binary system. The spectrum of HESS J1018-589 A is best fit with a power-law function with photon index Γ = 2.20 \plusmn 0.14$_stat$ \plusmn 0.2$_sys$. Emission is detected up to ~20 TeV. The mean differential flux level is (2.9 \plusmn 0.4) \times 10$^-13$ TeV$^-1$ cm$^-2$ s$^-1$ at 1 TeV, equivalent to ~1% of the flux from the Crab Nebula at the same energy. Variability is clearly detected in the night-by-night light curve. When folded on the orbital period of 16.58 days, the rebinned light curve peaks in phase with the observed X-ray and high-energy phaseograms. The fit of the HESS phaseogram to a constant flux provides evidence of periodicity at the level of N$_sigma$\gt 3σ. The shape of the VHE phaseogram and measured spectrum suggest a low-inclination, low-eccentricity system with amodest impact from VHE γ-ray absorption due to pair production (τ \lsim 1 at 300 GeV).

Place, publisher, year, edition, pages

2015. Vol. 577, article id A131

Keywords [en]

gamma rays, stars, individual, 1FGL J1018.6-5856, radiation mechanisms, non-thermal, acceleration of particles, X-rays, binaries

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Physics, Astroparticle Physics

Identifiers

URN: urn:nbn:se:lnu:diva-44648DOI: 10.1051/0004-6361/201525699ISI: 000357345900083Scopus ID: 2-s2.0-84930508059OAI: oai:DiVA.org:lnu-44648DiVA, id: diva2:822572

Available from: 2015-06-16 Created: 2015-06-16 Last updated: 2017-12-04Bibliographically approved

Open Access in DiVA

No full text in DiVA

Authority records

Becherini, Yvonne Prokoph, Heike Punch, Michael

Search in DiVA

doi

urn-nbn

Total: 354 hits

Cite ExportLink to record

Permanent link

https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-44648

Direct link

http://lnu.diva-portal.org/smash/record.jsf?pid=diva2:822572

Cite

Citation style

apa
ieee
modern-language-association-8th-edition
vancouver
Other style

More styles

Language

de-DE
en-GB
en-US
fi-FI
nn-NO
nn-NB
sv-SE
Other locale

More languages

Output format

html
text
asciidoc
rtf

v. 2.47.0

WCAG

DiVA support

Linnaeus University Library

Linnaeus University Press

Publish/Register