Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'503'724
Articles rated: 2609

24 April 2024

» arxiv » 1204.1964

Article overview

Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lac object 1RXS J101015.9-311909
HESS Collaboration ; A. Abramowski ; F. Acero ; F. Aharonian ; A. G. Akhperjanian ; G. Anton ; A. Balzer ; A. Barnacka ; Y. Becherini ; J. Becker ; K. Bernlöhr ; E. Birsin ; J. Biteau ; A. Bochow ; C. Boisson ; J. Bolmont ; P. Bordas ; J. Brucker ; F. Brun ; P. Brun ; T. Bulik ; I. Büsching ; S. Carrigan ; S. Casanova ; M. Cerruti ; P. M. Chadwick ; A. Charbonnier ; R. C. G. Chaves ; A. Cheesebrough ; G. Cologna ; J. Conrad ; M. Dalton ; M. K. Daniel ; I. D. Davids ; B. Degrange ; C. Deil ; H. J. Dickinson ; A. Djannati-Ataï ; W. Domainko ; L. O'C. Drury ; G. Dubus ; K. Dutson ; J. Dyks ; M. Dyrda ; K. Egberts ; P. Eger ; P. Espigat ; L. Fallon ; S. Fegan ; F. Feinstein ; M. V. Fernandes ; A. Fiasson ; G. Fontaine ; A. Förster ; M. Füßling ; Y. A. Gallant ; H. Gast ; L. Gérard ; D. Gerbig ; B. Giebels ; J. F. Glicenstein ; B. Glück ; D. Göring ; S. Häffner ; J. D. Hague ; J. Hahn ; D. Hampf ; J. Harris ; M. Hauser ; S. Heinz ; G. Heinzelmann ; G. Henri ; G. Hermann ; A. Hillert ; J. A. Hinton ; W. Hofmann ; P. Hofverberg ; M. Holler ; D. Horns ; A. Jacholkowska ; O. C. de Jager ; C. Jahn ; M. Jamrozy ; I. Jung ; M. A. Kastendieck ; K. Katarzyński ; U. Katz ; S. Kaufmann ; D. Keogh ; B. Khélifi ; D. Klochkov ; W. Kluźniak ; T. Kneiske ; Nu. Komin ; K. Kosack ; R. Kossakowski ; F. Krayzel ; H. Laffon ; G. Lamanna ; J.-P. Lenain ; D. Lennarz ; T. Lohse ; A. Lopatin ; C.-C. Lu ; V. Marandon ; A. Marcowith ; J. Masbou ; N. Maxted ; M. Mayer ; T. J. L. McComb ; M. C. Medina ; J. Méhault ; R. Moderski ; M. Mohamed ; E. Moulin ; C. L. Naumann ; M. Naumann-Godo ; M. de Naurois ; D. Nedbal ; D. Nekrassov ; N. Nguyen ; B. Nicholas ; J. Niemiec ; S. J. Nolan ; S. Ohm ; E. de Oña Wilhelmi ; B. Opitz ; M. Ostrowski ; I. Oya ; M. Panter ; M. Paz Arribas ; N. W. Pekeur ; G. Pelletier ; J. Perez ; P.-O. Petrucci ; B. Peyaud ; S. Pita ; G. Pühlhofer ; M. Punch ; A. Quirrenbach ; M. Raue ; S. M. Rayner ; A. Reimer ; O. Reimer ; M. Renaud ; R. de los Reyes ; F. Rieger ; J. Ripken ; L. Rob ; S. Rosier-Lees ; G. Rowell ; B. Rudak ; C. B. Rulten ; V. Sahakian ; D. A. Sanchez ; A. Santangelo ; R. Schlickeiser ; A. Schulz ; U. Schwanke ; S. Schwarzburg ; S. Schwemmer ; F. Sheidaei ; J. L. Skilton ; H. Sol ; G. Spengler ; Ł. Stawarz ; R. Steenkamp ; C. Stegmann ; F. Stinzing ; K. Stycz ; I. Sushch ; A. Szostek ; J.-P. Tavernet ; R. Terrier ; M. Tluczykont ; K. Valerius ; C. van Eldik ; G. Vasileiadis ; C. Venter ; A. Viana ; P. Vincent ; H. J. Völk ; F. Volpe ; S. Vorobiov ; M. Vorster ; S. J. Wagner ; M. Ward ; R. White ; A. Wierzcholska ; M. Zacharias ; A. Zajczyk ; A. A. Zdziarski ; A. Zech ; H.-S. Zechlin ;
Date:	9 Apr 2012
Abstract:	1RXS J101015.9-311909 is a galaxy located at a redshift of z=0.14 hosting an active nucleus belonging to the class of bright BL Lac objects. Observations at high (HE, E > 100 MeV) and very high (VHE, E > 100 GeV) energies provide insights into the origin of very energetic particles present in such sources and the radiation processes at work. We report on results from VHE observations performed between 2006-10 with H.E.S.S. H.E.S.S. data have been analysed with enhanced analysis methods, making the detection of faint sources more significant. VHE emission at a position coincident with 1RXS J101015.9-311909 is detected with H.E.S.S. for the first time. In a total good-quality livetime of about 49 h, we measure 263 excess counts, corresponding to a significance of 7.1sigma. The photon spectrum above 0.2 TeV can be described by a power-law with a photon index of Gamma = 3.08pm0.42_{stat}pm0.20_{sys}. The integral flux above 0.2 TeV is about 0.8% of the flux of the Crab nebula and shows no significant variability over the time reported. In addition, public Fermi/LAT data are analysed to search for high energy emission from the source. The Fermi/LAT HE emission is significant at 8.3sigma in the chosen 25-month dataset. UV and X-ray contemporaneous observations with the Swift satellite in May 2007 are also reported, together with optical observations performed with the ATOM telescope located at the H.E.S.S. site. Swift observations reveal an absorbed X-ray flux of F_{0.3-7 keV} = 1.04^{+0.04}_{-0.05} imes 10^{-11} erg.cm^{-2}.s^{-1} in the 0.3-7 keV range. Finally, all the available data are used to study the source’s multi-wavelength properties. The SED can be reproduced using a simple one-zone SSC model with emission from a region with a Doppler factor of 30 and a magnetic field between 0.025 and 0.16 G. These parameters are similar to those obtained for other sources of this type.
Source:	arXiv, 1204.1964
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