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Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S

A. Abramowski F. Aharonian F. Ait Benkhali A.G. Akhperjanian E. Angüner G. Anton S. Balenderan Agnès Balzer A. Barnacka Y. Becherini J. Becker Tjus K. Bernlöhr E. Birsin E. Bissaldi J. Biteau 1 M. Böttcher C. Boisson J. Bolmont 2 P. Bordas J. Brucker F. Brun P. Brun 3 T. Bulik S. Carrigan S. Casanova M. Cerruti P.M. Chadwick R. Chalme-Calvet 2 R.C.G. Chaves A. Cheesebrough M. Chrétien 2 S. Colafrancesco G. Cologna J. Conrad C. Couturier 2 M. Dalton 4 M.K. Daniel I.D. Davids B. Degrange 1 C. Deil P. Dewilt H.J. Dickinson A. Djannati-Ataï 5 W. Domainko L.O'C. Drury G. Dubus K. Dutson J. Dyks M. Dyrda T. Edwards K. Egberts P. Eger P. Espigat 6 C. Farnier S. Fegan 1 F. Feinstein 7 M.V. Fernandes D. Fernandez 7 A. Fiasson 8 G. Fontaine 1 A. Förster M. Füßling M. Gajdus Y.A. Gallant 7 T. Garrigoux 2 B. Giebels 1 J.F. Glicenstein M.-H. Grondin M. Grudzińska S. Häffner J. Hahn J. Harris G. Heinzelmann G. Henri G. Hermann O. Hervet A. Hillert J.A. Hinton W. Hofmann P. Hofverberg M. Holler D. Horns A. Jacholkowska 2 C. Jahn M. Jamrozy M. Janiak F. Jankowsky I. Jung M.A. Kastendieck K. Katarzyński U. Katz S. Kaufmann B. Khélifi 1, 6 Michel Kieffer 2 S. Klepser D. Klochkov W. Kluźniak T. Kneiske D. Kolitzus Nu. Komin 8 K. Kosack S. Krakau F. Krayzel 8 P.P. Krüger H. Laffon 4 G. Lamanna 8 J. Lefaucheur 6 A. Lemière 6 M. Lemoine-Goumard 4 J.-P. Lenain 2 D. Lennarz T. Lohse A. Lopatin C.-C. Lu V. Marandon A. Marcowith 7 R. Marx G. Maurin 8 N. Maxted M. Mayer T.J.L. Mccomb J. Méhault 4 U. Menzler M. Meyer R. Moderski M. Mohamed Emmanuel Moulin T. Murach C.L. Naumann 2 M. de Naurois 1 J. Niemiec S.J. Nolan L. Oakes P.T. O'Brien 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 J. Perez P.-O. Petrucci B. Peyaud S. Pita 6 H. Poon G. Pühlhofer M. Punch 6 A. Quirrenbach S. Raab M. Raue A. Reimer O. Reimer M. Renaud 7 R. de los Reyes F. Rieger L. Rob C. Romoli S. Rosier-Lees 8 G. Rowell B. Rudak C.B. Rulten V. Sahakian D.A. Sanchez A. Santangelo R. Schlickeiser F. Schüssler A. Schulz U. Schwanke S. Schwarzburg S. Schwemmer H. Sol G. Spengler F. Spies Ł. Stawarz R. Steenkamp C. Stegmann F. Stinzing K. Stycz I. Sushch A. Szostek P.H.T. Tam J.-P. Tavernet 2 T. Tavernier 6 A.M. Taylor R. Terrier 6 M. Tluczykont C. Trichard 8 K. Valerius C. van Eldik G. Vasileiadis 7 C. Venter A. Viana P. Vincent 2 H.J. Völk F. Volpe M. Vorster S.J. Wagner P. Wagner M. Ward M. Weidinger Q. Weitzel R. White A. Wierzcholska P. Willmann A. Wörnlein D. Wouters M. Zacharias A. Zajczyk A.A. Zdziarski A. Zech H.-S. Zechli
1 LLR - Laboratoire Leprince-Ringuet
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
4 GLAST
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
5 APC - AHE - APC - Astrophysique des Hautes Energies
APC (UMR_7164) - AstroParticule et Cosmologie, Dipartimento di Astronomia, Universita degli Studi di Bologna
6 APC (UMR_7164) - AstroParticule et Cosmologie
7 LUPM - Laboratoire Univers et Particules de Montpellier
8 LAPP - Laboratoire d'Annecy de Physique des Particules
Abstract : The long gamma-ray burst (GRB) 100621A, at the time the brightest X-ray transient ever detected by Swift-XRT in the 0.3--10 keV range, has been observed with the H.E.S.S. imaging air Cherenkov telescope array, sensitive to gamma radiation in the very-high-energy (VHE, >100 GeV) regime. Due to its relatively small redshift of z∼0.5, the favourable position in the southern sky and the relatively short follow-up time (<700s after the satellite trigger) of the H.E.S.S. observations, this GRB could be within the sensitivity reach of the H.E.S.S. instrument. The analysis of the H.E.S.S. data shows no indication of emission and yields an integral flux upper limit above ∼380 GeV of 4.2×10−12cm−2s−1 (95 % confidence level), assuming a simple Band function extension model. A comparison to a spectral-temporal model, normalised to the prompt flux at sub-MeV energies, constraints the existence of a temporally extended and strong additional hard power law, as has been observed in the other bright X-ray GRB 130427A. A comparison between the H.E.S.S. upper limit and the contemporaneous energy output in X-rays constrains the ratio between the X-ray and VHE gamma-ray fluxes to be greater than 0.4. This value is an important quantity for modelling the afterglow and can constrain leptonic emission scenarios, where leptons are responsible for the X-ray emission and might produce VHE gamma rays.
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http://hal.in2p3.fr/in2p3-01020011
Contributor : Nathalie Martin <>
Submitted on : Friday, July 11, 2014 - 2:56:52 PM
Last modification on : Wednesday, September 15, 2021 - 2:26:03 PM

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CENBG | LAPP | LLR | CNRS | X-LLR | LUPM | DSM-IRFU | IN2P3 | CEA | OBSPM | X | UPMC | UNIV-SAVOIE | IRFU-APC | MIPS | UNIV-MONTPELLIER | CEA-DRF | X-DEP-PHYS | SORBONNE-UNIVERSITE | UNIV-PARIS7 | USPC | LUPM_EMA | UNIV-PARIS | UP-SCIENCES | PSL | UGA | SU-TI | APC | LPNHE | SU-SCIENCES

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A. Abramowski, F. Aharonian, F. Ait Benkhali, A.G. Akhperjanian, E. Angüner, et al.. Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S. Astronomy and Astrophysics - A&A, EDP Sciences, 2014, 565, pp.A16. ⟨10.1051/0004-6361/201322984⟩. ⟨in2p3-01020011⟩

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