Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'506'133
Articles rated: 2609

26 April 2024

» arxiv » 1503.2711

Article overview

Discovery of variable VHE gamma-ray emission from the binary system 1FGL J1018.6-5856
H.E.S.S. Collaboration ; A. Abramowski ; F. Aharonian ; F. Ait Benkhali ; A.G. Akhperjanian ; E.O. Angüner ; M. Backes ; A. Balzer ; Y. Becherini ; J. Becker Tjus ; D. Berge ; S. Bernhard ; K. Bernlöhr ; E. Birsin ; R. Blackwell ; M. Böttcher ; C. Boisson ; J. Bolmont ; P. Bordas ; J. Bregeon ; F. Brun ; P. Brun ; M. Bryan ; T. Bulik ; J. Carr ; S. Casanova ; N. Chakraborty ; R. Chalme-Calvet ; R.C.G. Chaves ; A. Chen ; M. Chrétien ; S. Colafrancesco ; G. Cologna ; J. Conrad ; C. Couturier ; Y. Cui ; I.D. Davids ; B. Degrange ; C. Deil ; P. deWilt ; A. Djannati-Ataï ; W. Domainko ; A. Donath ; L.O'C. Drury ; G. Dubus ; K. Dutson ; J. Dyks ; M. Dyrda ; T. Edwards ; K. Egberts ; P. Eger ; J.-P. Ernenwein ; P. Espigat ; C. Farnier ; S. Fegan ; F. Feinstein ; M.V. Fernandes ; D. Fernandez ; A. Fiasson ; G. Fontaine ; A. Förster ; M. Füßling ; S. Gabici ; M. Gajdus ; Y.A. Gallant ; T. Garrigoux ; G. Giavitto ; B. Giebels ; J.F. Glicenstein ; D. Gottschall ; A. Goyal ; M.-H. Grondin ; M. Grudzińska ; D. Hadasch ; S. Häffner ; J. Hahn ; J. Hawkes ; G. Heinzelmann ; G. Henri ; G. Hermann ; O. Hervet ; A. Hillert ; J.A. Hinton ; W. Hofmann ; P. Hofverberg ; C. Hoischen ; M. Holler ; D. Horns ; A. Ivascenko ; A. Jacholkowska ; C. Jahn ; M. Jamrozy ; M. Janiak ; F. Jankowsky ; I. Jung-Richardt ; M.A. Kastendieck ; K. Katarzyński ; U. Katz ; D. Kerszberg ; B. Khélifi ; M. Kieffer ; S. Klepser ; D. Klochkov ; W. Kluźniak ; D. Kolitzus ; Nu. Komin ; K. Kosack ; S. Krakau ; F. Krayzel ; P.P. Krüger ; H. Laffon ; G. Lamanna ; J. Lau ; J. Lefaucheur ; V. Lefranc ; A. Lemière ; M. Lemoine-Goumard ; J.-P. Lenain ; T. Lohse ; A. Lopatin ; C.-C. Lu ; R. Lui ; V. Marandon ; A. Marcowith ; C. Mariaud ; R. Marx ; G. Maurin ; N. Maxted ; M. Mayer ; P.J. Meintjes ; U. Menzler ; M. Meyer ; A.M.W. Mitchell ; R. Moderski ; M. Mohamed ; K. Morå ; E. Moulin ; T. Murach ; M. de Naurois ; J. Niemiec ; L. Oakes ; H. Odaka ; S. Öttl ; S. Ohm ; E. de Oña Wilhelmi ; B. Opitz ; M. Ostrowski ; I. Oya ; M. Panter ; R.D. Parsons ; M. Paz Arribas ; N.W. Pekeur ; G. Pelletier ; P.-O. Petrucci ; B. Peyaud ; S. Pita ; H. Poon ; H. Prokoph ; G. Pühlhofer ; M. Punch ; A. Quirrenbach ; S. Raab ; I. Reichardt ; A. Reimer ; O. Reimer ; M. Renaud ; R. de los Reyes ; F. Rieger ; C. Romoli ; S. Rosier-Lees ; G. Rowell ; B. Rudak ; C.B. Rulten ; V. Sahakian ; D. Salek ; D.A. Sanchez ; A. Santangelo ; M. Sasaki ; R. Schlickeiser ; F. Schüssler ; A. Schulz ; U. Schwanke ; S. Schwemmer ; A.S. Seyffert ; R. Simoni ; H. Sol ; F. Spanier ; G. Spengler ; F. Spies ; Ł. Stawarz ; R. Steenkamp ; C. Stegmann ; F. Stinzing ; K. Stycz ; I. Sushch ; J.-P. Tavernet ; T. Tavernier ; A.M. Taylor ; R. Terrier ; M. Tluczykont ; C. Trichard ; K. Valerius ; J. van der Walt ; C. van Eldik ; B. van Soelen ; G. Vasileiadis ; J. Veh ; C. Venter ; A. Viana ; P. Vincent ; J. Vink ; F. Voisin ; H.J. Völk ; T. Vuillaume ; S.J. Wagner ; P. Wagner ; R.M. Wagner ; M. Weidinger ; Q. Weitzel ; R. White ; A. Wierzcholska ; P. Willmann ; A. Wörnlein ; D. Wouters ; R. Yang ; V. Zabalza ; D. Zaborov ; M. Zacharias ; A.A. Zdziarski ; A. Zech ; F. Zefi ; N. Żywucka ;
Date:	9 Mar 2015
Abstract:	Re-observations with the H.E.S.S. telescope array of the very-high-energy (VHE) source HESS J1018-589 A coincident with the Fermi-LAT $gamma$-ray binary 1FGL J1018.6-5856 have resulted in a source detection significance of more than 9$sigma$, and the detection of variability ($chi^2$/$ u$ of 238.3/155) in the emitted $gamma$-ray flux. This variability confirms the association of HESS J1018-589 A with the high-energy $gamma$-ray binary detected by Fermi-LAT, and also confirms the point-like source as a new very-high-energy binary system. The spectrum of HESS J1018-589 A is best fit with a power-law function with photon index $Gamma = 2.20 pm 0.14_{ m stat} pm 0.2_{ m sys}$. Emission is detected up to ~20 TeV. The mean differential flux level is $(2.9 pm 0.4) imes10^{-13}$ 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 lightcurve. When folded on the orbital period of 16.58 days, the rebinned lightcurve peaks in phase with the observed X-ray and high-energy phaseograms. The fit of the H.E.S.S. phaseogram to a constant flux provides evidence of periodicity at the level of 3$sigma$. The shape of the VHE phaseogram and measured spectrum suggest a low inclination, low eccentricity system with a modest impact from VHE $gamma$-ray absorption due to pair production ($ au$ < 1 at 300 GeV).
Source:	arXiv, 1503.2711
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap