HESS observations of the prompt and afterglow phases of GRB 060602B

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dc.contributor.authorAharonian, F.
dc.contributor.authorAkhperjanian, A.
dc.contributor.authorBarres de Almaida, U.
dc.contributor.authorBazer-Bachi, A.
dc.contributor.authorBehera, B.
dc.contributor.authorBeilicke, M.
dc.contributor.authorBenbow, W.
dc.contributor.authorBernlohr, K.
dc.contributor.authorBoisson, C.
dc.contributor.authorBorrel, V.
dc.contributor.authorBraun, I.
dc.contributor.authorBrion, E.
dc.contributor.authorBrucker, J.
dc.contributor.authorBuhler, R.
dc.contributor.authorBulik, T.
dc.contributor.authorBusching, I.
dc.contributor.authorBoutelier, T.
dc.contributor.authorCarrigan, S.
dc.contributor.authorChadwick, P.
dc.contributor.authorChaves, R.
dc.contributor.authoret al.
dc.date.issued2009
dc.description.abstractWe report on the first completely simultaneous observation of a gamma-ray burst (GRB) using an array of Imaging Atmospheric Cherenkov Telescopes, which is sensitive to photons in the very high energy (VHE) γ-ray range ( 100 GeV). On 2006 June 2, the Swift Burst Alert Telescope (BAT) registered an unusually soft γ-ray burst (GRB 060602B). The burst position was under observation using the High Energy Stereoscopic System (HESS) at the time the burst occurred. Data were taken before, during, and after the burst. A total of 5 hr of observations were obtained during the night of 2006 June 2-3, and five additional hours were obtained over the next three nights. No VHE γ-ray signal was found during the period covered by the HESS observations. The 99% confidence level flux upper limit (> 1 TeV) for the prompt phase (9 s) of GRB 060602B is 2.9 × 10–9 erg cm–2 s–1. Due to the very soft BAT spectrum of the burst compared with other Swift GRBs and its proximity to the Galactic center, the burst is likely associated with a Galactic X-ray burster, although the possibility of it being a cosmological GRB cannot be ruled out. We discuss the implications of our flux limits in the context of these two bursting scenarios.
dc.description.statementofresponsibilityF. Aharonian... G. Rowell... et al.
dc.identifier.citationThe Astrophysical Journal: an international review of astronomy and astronomical physics, 2009; 690(2):1068-1073
dc.identifier.doi10.1088/0004-637X/690/2/1068
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttp://hdl.handle.net/2440/56494
dc.language.isoen
dc.publisherUniv Chicago Press
dc.source.urihttps://doi.org/10.1088/0004-637x/690/2/1068
dc.subjectgamma rays: bursts
dc.subjectgamma rays: observations
dc.titleHESS observations of the prompt and afterglow phases of GRB 060602B
dc.typeJournal article
pubs.publication-statusPublished

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