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Fermi Observations of GRB 090902B: A Distinct Spectral Component in the Prompt and Delayed Emission

dc.contributor.authorABDO, A.A.
dc.contributor.authorACKERMANN, Markus
dc.contributor.authorAJELLO, Marco
dc.contributor.authorASANO, K.
dc.contributor.authorATWOOD, William B.
dc.contributor.authorAXELSSON, Magnus
dc.contributor.authorBALDINI, Luca
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorBALLET, Jean
dc.contributor.authorBARBIELLINI, Guido
dc.contributor.authorBARING, Matthew G.
dc.contributor.authorBASTIERI, D.
dc.contributor.authorBECHTOL, K.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorBELLAZZINI, R.
dc.contributor.authorBERENJI, B.
dc.contributor.authorBHAT, P. N.
dc.contributor.authorBISSALDI, E.
dc.contributor.authorBLANDFORD, R. D.
dc.contributor.authorBLOOM, E.D.
dc.contributor.authorBONAMENTE, E.
dc.contributor.authorBORGLAND, A.W.
dc.contributor.authorBOUVIER, A.
dc.contributor.authorBREGEON, J.
dc.contributor.authorBREZ, A.
dc.contributor.authorBRIGGS, M. S.
dc.contributor.authorBRIGIDA, M.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorBRUEL, Pascal
dc.contributor.authorBURGESS, J.M.
dc.contributor.authorBURROWS, D.N.
dc.contributor.authorBUSON, S.
dc.contributor.authorCALIANDRO, G. A.
dc.contributor.authorCAMERON, R. A.
dc.contributor.authorCARAVEO, P. A.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorCASANDJIAN, J.M.
dc.contributor.authorCECCHI, C.
dc.contributor.authorCELIK, O.
dc.contributor.authorCHEKHTMAN, A.
dc.contributor.authorCHEUNG, C.C.
dc.contributor.authorCHIANG, J.
dc.contributor.authorCIPRINI, S.
dc.contributor.authorCLAUS, R.
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorCOHEN-TANUGI, J.
dc.contributor.authorCOMINSKI, L.R.
dc.contributor.authorCONNAUGHTON, V.
dc.contributor.authorCONRAD, J.
dc.contributor.authorCUTINI, S.
dc.contributor.authorD'ELIA, V.
dc.contributor.authorDERMER, C.D.
dc.contributor.authorDE ANGELIS, A.
dc.contributor.authorDE PALMA, F.
dc.contributor.authorDIGEL, S.W.
dc.contributor.authorDINGUS, B. L.
dc.contributor.authorDO COUTO E SILVA, E.
dc.contributor.authorDRELL, P.S.
dc.contributor.authorDUBOIS, R.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorDUMORA, D.
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorFARNIER, C.
dc.contributor.authorFAVUZZI, C.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorFEGAN, S.J.
dc.contributor.authorFINKE, J.
dc.contributor.authorFISHMAN, G.
dc.contributor.authorFOCKE, W.B.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorFORTIN, P.
dc.contributor.authorFRAILIS, M.
dc.contributor.authorFUKAZAWA, Y.
dc.contributor.authorFUNK, S.
dc.contributor.authorFUSCO, P.
dc.contributor.authorGARGANO, F.
dc.contributor.authorGEHRELS, N.
dc.contributor.authorGERMANI, S.
dc.contributor.authorGIAVITTO, G.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorGIEBELS, B.
dc.contributor.authorGIGLIETTO, N.
dc.contributor.authorGIORDANO, F.
dc.contributor.authorGLANZMAN, T.
dc.contributor.authorGODFREY, G.
dc.contributor.authorGOLDSTEIN, A.
dc.contributor.authorGRANOT, J.
dc.contributor.authorGREINER, J.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorGRENIER, I.A.
dc.contributor.authorGROVE, J.E.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorGUILLEMOT, L.
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorGUIRIEC, S.
dc.contributor.authorHANABATA, Y.
dc.contributor.authorHARDING, A.K.
dc.contributor.authorHAYASHIDA, M.
dc.contributor.authorHAYS, E.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorHORAN, D.
dc.contributor.authorHUGHES, R. E.
dc.contributor.authorJACKSON, M.S.
dc.contributor.authorJÓHANNESSON, G.
dc.contributor.authorJOHNSON, A. S.
dc.contributor.authorJOHNSON, R. P.
dc.contributor.authorJOHNSON, W. N.
dc.contributor.authorKAMAE, T.
dc.contributor.authorKATAGIRI, H.
dc.contributor.authorKATAOKA, J.
dc.contributor.authorKAWAI, N.
dc.contributor.authorKERR, M.
dc.contributor.authorKIPPEN, R. M.
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorKNÖDLSEDER, Jürgen
dc.contributor.authorKOCEVSKI, D.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorKOMIN, N.
dc.contributor.authorKOUVELIOTOU, C.
dc.contributor.authorKUSS, M.
dc.contributor.authorLANDE, J.
dc.contributor.authorLATRONICO, L.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorLEMOINE-GOUMARD, M.
dc.contributor.authorLONGO, F.
dc.contributor.authorLOPARCO, F.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorLOTT, B.
dc.contributor.authorLOVELLETTE, M.N.
dc.contributor.authorLUBRANO, P.
dc.contributor.authorMADJESKI, G.M.
dc.contributor.authorMAKEEV, A.
dc.contributor.authorMAZZIOTTA, M.N.
dc.contributor.authorMCBREEN, S.
dc.contributor.authorMCENERY, J.E.
dc.contributor.authorMCGLYNN, S.
dc.contributor.authorMEEGAN, C.
dc.contributor.authorMÉSZÁROS, P.
dc.contributor.authorMEURER, C.
dc.contributor.authorMICHELSON, P.F.
dc.contributor.authorMITTHUMSIRI, W.
dc.contributor.authorMIZUNO, T.
dc.contributor.authorMOISEEV, A.A.
dc.contributor.authorMONTE, C.
dc.contributor.authorMONZANI, M.E.
dc.contributor.authorMORETTI, E.
dc.contributor.authorMORSELLI, A.
dc.contributor.authorMOSKALENKO, I.V.
dc.contributor.authorMURGIA, S.
dc.contributor.authorNAKAMORI, T.
dc.contributor.authorNOLAN, P. L.
dc.contributor.authorNORRIS, J. P.
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorNUSS, E.
dc.contributor.authorOHNO, M.
dc.contributor.authorOHSUGI, T.
dc.contributor.authorOMODEI, N.
dc.contributor.authorORLANDO, E.
dc.contributor.authorORMES, J.F.
dc.contributor.authorPACIESAS, W. S.
dc.contributor.authorPANEQUE, D.
dc.contributor.authorPANETTA, J.H.
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorPELASSA, V.
dc.contributor.authorPEPE, M.
dc.contributor.authorPESCE-ROLLINS, M.
dc.contributor.authorPETROSIAN, V.
hal.structure.identifierLaboratoire de Physique Théorique et Astroparticules [LPTA]
dc.contributor.authorPIRON, F.
dc.contributor.authorPORTER, T.A.
dc.contributor.authorPREECE, R.
dc.contributor.authorRAINÒ, S.
dc.contributor.authorRANDO, R.
dc.contributor.authorRAU, A.
dc.contributor.authorRAZZANO, M.
dc.contributor.authorRAZZAQUE, S.
dc.contributor.authorREIMER, A.
dc.contributor.authorREIMER, O.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorREPOSEUR, T.
dc.contributor.authorRITZ, S.
dc.contributor.authorROCHESTER, L.S.
dc.contributor.authorRODRIGUEZ, A.Y.
dc.contributor.authorROMING, P.W.A.
dc.contributor.authorROTH, M.
dc.contributor.authorRYDE, F.
dc.contributor.authorSADROZINSKI, H. F.-W.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorSANCHEZ, D.
dc.contributor.authorSANDER, A.
dc.contributor.authorSAZ PARKINSON, P.M.
dc.contributor.authorSCARGLE, J.D.
dc.contributor.authorSCHALK, T.L.
dc.contributor.authorSGRÒ, C.
dc.contributor.authorSISKIND, E.J.
dc.contributor.authorSMITH, P.D.
dc.contributor.authorSPINELLI, P.
dc.contributor.authorSTAMATIKOS, M.
dc.contributor.authorSTECKER, F. W.
dc.contributor.authorSTRATTA, G.
dc.contributor.authorSTRICKMAN, M.S.
dc.contributor.authorSUSON, D.J.
dc.contributor.authorSWENSON, C.A.
dc.contributor.authorTAJIMA, H.
dc.contributor.authorTAKAHASHI, H.
dc.contributor.authorTANAKA, T.
dc.contributor.authorTHAYER, J.B.
dc.contributor.authorTHAYER, J.G.
dc.contributor.authorTHOMPSON, D.J.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorTIBALDO, L.
dc.contributor.authorTORRES, D.F.
dc.contributor.authorTOSTI, G.
dc.contributor.authorTRAMACERE, A.
dc.contributor.authorUCHIYAMA, Y.
dc.contributor.authorUEHARA, T.
dc.contributor.authorUSHER, T. L.
dc.contributor.authorVAN DER HORST, A. J.
dc.contributor.authorVASILEIOU, V.
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorVILCHEZ, N.
dc.contributor.authorVITALE, V.
dc.contributor.authorVON KIENLIN, A.
dc.contributor.authorWAITE, A. P.
dc.contributor.authorWANG, P.
dc.contributor.authorWILSON-HODGE, C.
dc.contributor.authorWINER, B. L.
dc.contributor.authorWOOD, K.S.
dc.contributor.authorYAMAZAKI, R.
dc.contributor.authorYLINEN, T.
dc.contributor.authorZIEGLER, M.
dc.date.issued2009-11-20
dc.identifier.issn2041-8205
dc.description.abstractEnWe report on the observation of the bright, long gamma-ray burst, GRB 090902B, by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on-board the Fermi observatory. This was one of the brightest GRBs to have been observed by the LAT, which detected several hundred photons during the prompt phase. With a redshift of z = 1.822, this burst is among the most luminous detected by Fermi. Time-resolved spectral analysis reveals a significant power-law component in the LAT data that is distinct from the usual Band model emission that is seen in the sub-MeV energy range. This power-law component appears to extrapolate from the GeV range to the lowest energies and is more intense than the Band component both below $\sim$ 50 keV and above 100 MeV. The Band component undergoes substantial spectral evolution over the entire course of the burst, while the photon index of the power-law component remains constant for most of the prompt phase, then hardens significantly towards the end. After the prompt phase, power-law emission persists in the LAT data as late as 1 ks post-trigger, with its flux declining as $t^{-1.5}$. The LAT detected a photon with the highest energy so far measured from a GRB, $33.4_{-3.5}^{+2.7}$ GeV. This event arrived 82 seconds after the GBM trigger and $\sim$ 50 seconds after the prompt phase emission had ended in the GBM band. We discuss the implications of these results for models of GRB emission and for constraints on models of the Extragalactic Background Light.
dc.language.isoen
dc.publisherBristol : IOP Publishing
dc.subject.engamma rays: bursts
dc.title.enFermi Observations of GRB 090902B: A Distinct Spectral Component in the Prompt and Delayed Emission
dc.typeArticle de revue
dc.identifier.doi10.1088/0004-637X/706/1/L138
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.identifier.arxiv0909.2470
bordeaux.journalThe Astrophysical journal letters
bordeaux.pageL138-L144
bordeaux.volume706
bordeaux.peerReviewedoui
hal.identifierin2p3-00436385
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00436385v1
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