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fermi observations of grb 090902b: a distinct spectral component in the prompt and delayed emission

We report on the observation of the bright, long gamma-ray burst (GRB), 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 pho... Full description

Journal Title: The Astrophysical Journal 2009, Vol.706(1), pp.L138-L144
Main Author: Abdo, A. A.
Other Authors: Ackermann, M. , Ajello, M. , Asano, K. , Atwood, W. B. , Axelsson, M. , Baldini, L. , Ballet, J. , Barbiellini, G. , Baring, M. G. , Bastieri, D. , Bechtol, K. , Bellazzini, R. , Berenji, B. , Bhat, P. N. , Bissaldi, E. , Blandford, R. D. , Bloom, E. D. , Bonamente, E. , Borgland, A. W. , Bouvier, A. , Bregeon, J. , Brez, A. , Briggs, M. S. , Brigida, M. , Bruel, P. , Burgess, J. M. , Burrows, D. N. , Buson, S. , Caliandro, G. A. , Cameron, R. A. , Caraveo, P. A. , Casandjian, J. M. , Cecchi, C. , Çelik, Ö. , Chekhtman, A. , Cheung, C. C. , Chiang, J. , Ciprini, S. , Claus, R. , Cohen-Tanugi, J. , Cominsky, L. R. , Connaughton, V. , Conrad, J. , Cutini, S. , Delia, V. , Dermer, C. D. , De Angelis, A. , De Palma, F. , Digel, S. W. , Dingus, B. L. , Do Couto E Silva, E. , Drell, P. S. , Dubois, R. , Dumora, D. , Farnier, C. , Favuzzi, C. , Fegan, S. J. , Finke, J. , Fishman, G. , Focke, W. B. , Fortin, P. , Frailis, M. , Fukazawa, Y. , Funk, S. , Fusco, P. , Gargano, F. , Gehrels, N. , Germani, S. , Giavitto, G. , Giebels, B. , Giglietto, N. , Giordano, F. , Glanzman, T. , Godfrey, G. , Goldstein, A. , Granot, J. , Greiner, J. , Grenier, I. A. , Grove, J. E. , Guillemot, L. , Guiriec, S. , Hanabata, Y. , Harding, A. K. , Hayashida, M. , Hays, E. , Horan, D. , Hughes, R. E. , Jackson, M. S. , Jóhannesson, G. , Johnson, A. S. , Johnson, R. P. , Johnson, W. N. , Kamae, T. , Katagiri, H. , Kataoka, J. , Kawai, N. , Kerr, M. , Kippen, R. M. , Knödlseder, J. , Kocevski, D. , Komin, N. , Kouveliotou, C. , Kuss, M. , Lande, J. , Latronico, L. , Lemoine-Goumard, M. , Longo, F. , Loparco, F. , Lott, B. , Lovellette, M. N. , Lubrano, P. , Madejski, G. M. , Makeev, A. , Mazziotta, M. N. , Mcbreen, S. , Mcenery, J. E. , Mcglynn, S. , Meegan, C. , Mészáros, P. , Meurer, C. , Michelson, P. F. , Mitthumsiri, W. , Mizuno, T. , Moiseev, A. A. , Monte, C. , Monzani, M. E. , Moretti, E. , Morselli, A. , Moskalenko, I. V. , Murgia, S. , Nakamori, T. , Nolan, P. L. , Norris, J. P. , Nuss, E. , Ohno, M. , Ohsugi, T. , Omodei, N. , Orlando, E. , Ormes, J. F. , Paciesas, W. S. , Paneque, D. , Panetta, J. H. , Pelassa, V. , Pepe, M. , Pesce-Rollins, M. , Petrosian, V. , Piron, F. , Porter, T. A. , Preece, R. , Rainò, S. , Rando, R. , Rau, A. , Razzano, M. , Razzaque, S. , Reimer, A. , Reimer, O. , Reposeur, T. , Ritz, S. , Rochester, L. S. , Rodriguez, A. Y. , Roming, P. W. A. , Roth, M. , Ryde, F. , Sadrozinski, H. F.-W. , Sanchez, D. , Sander, A. , Saz Parkinson, P. M. , Scargle, J. D. , Schalk, T. L. , Sgrò, C. , Siskind, E. J. , Smith, P. D. , Spinelli, P. , Stamatikos, M. , Stecker, F. W. , Stratta, G. , Strickman, M. S. , Suson, D. J. , Swenson, C. A. , Tajima, H. , Takahashi, H. , Tanaka, T. , Thayer, J. B. , Thayer, J. G. , Thompson, D. J. , Tibaldo, L. , Torres, D. F. , Tosti, G. , Tramacere, A. , Uchiyama, Y. , Uehara, T. , Usher, T. L. , Van Der Horst, A. J. , Vasileiou, V. , Vilchez, N. , Vitale, V. , Von Kienlin, A. , Waite, A. P. , Wang, P. , Wilson-Hodge, C. , Winer, B. L. , Wood, K. S. , Yamazaki, R. , Ylinen, T. , Ziegler, M.
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0004-637X ; E-ISSN: 1538-4357 ; DOI: 10.1088/0004-637X/706/1/L138
Link: http://dx.doi.org/10.1088/0004-637X/706/1/L138
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title: fermi observations of grb 090902b: a distinct spectral component in the prompt and delayed emission
format: Article
creator:
  • Abdo, A. A.
  • Ackermann, M.
  • Ajello, M.
  • Asano, K.
  • Atwood, W. B.
  • Axelsson, M.
  • Baldini, L.
  • Ballet, J.
  • Barbiellini, G.
  • Baring, M. G.
  • Bastieri, D.
  • Bechtol, K.
  • Bellazzini, R.
  • Berenji, B.
  • Bhat, P. N.
  • Bissaldi, E.
  • Blandford, R. D.
  • Bloom, E. D.
  • Bonamente, E.
  • Borgland, A. W.
  • Bouvier, A.
  • Bregeon, J.
  • Brez, A.
  • Briggs, M. S.
  • Brigida, M.
  • Bruel, P.
  • Burgess, J. M.
  • Burrows, D. N.
  • Buson, S.
  • Caliandro, G. A.
  • Cameron, R. A.
  • Caraveo, P. A.
  • Casandjian, J. M.
  • Cecchi, C.
  • Çelik, Ö.
  • Chekhtman, A.
  • Cheung, C. C.
  • Chiang, J.
  • Ciprini, S.
  • Claus, R.
  • Cohen-Tanugi, J.
  • Cominsky, L. R.
  • Connaughton, V.
  • Conrad, J.
  • Cutini, S.
  • Delia, V.
  • Dermer, C. D.
  • De Angelis, A.
  • De Palma, F.
  • Digel, S. W.
  • Dingus, B. L.
  • Do Couto E Silva, E.
  • Drell, P. S.
  • Dubois, R.
  • Dumora, D.
  • Farnier, C.
  • Favuzzi, C.
  • Fegan, S. J.
  • Finke, J.
  • Fishman, G.
  • Focke, W. B.
  • Fortin, P.
  • Frailis, M.
  • Fukazawa, Y.
  • Funk, S.
  • Fusco, P.
  • Gargano, F.
  • Gehrels, N.
  • Germani, S.
  • Giavitto, G.
  • Giebels, B.
  • Giglietto, N.
  • Giordano, F.
  • Glanzman, T.
  • Godfrey, G.
  • Goldstein, A.
  • Granot, J.
  • Greiner, J.
  • Grenier, I. A.
  • Grove, J. E.
  • Guillemot, L.
  • Guiriec, S.
  • Hanabata, Y.
  • Harding, A. K.
  • Hayashida, M.
  • Hays, E.
  • Horan, D.
  • Hughes, R. E.
  • Jackson, M. S.
  • Jóhannesson, G.
  • Johnson, A. S.
  • Johnson, R. P.
  • Johnson, W. N.
  • Kamae, T.
  • Katagiri, H.
  • Kataoka, J.
  • Kawai, N.
  • Kerr, M.
  • Kippen, R. M.
  • Knödlseder, J.
  • Kocevski, D.
  • Komin, N.
  • Kouveliotou, C.
  • Kuss, M.
  • Lande, J.
  • Latronico, L.
  • Lemoine-Goumard, M.
  • Longo, F.
  • Loparco, F.
  • Lott, B.
  • Lovellette, M. N.
  • Lubrano, P.
  • Madejski, G. M.
  • Makeev, A.
  • Mazziotta, M. N.
  • Mcbreen, S.
  • Mcenery, J. E.
  • Mcglynn, S.
  • Meegan, C.
  • Mészáros, P.
  • Meurer, C.
  • Michelson, P. F.
  • Mitthumsiri, W.
  • Mizuno, T.
  • Moiseev, A. A.
  • Monte, C.
  • Monzani, M. E.
  • Moretti, E.
  • Morselli, A.
  • Moskalenko, I. V.
  • Murgia, S.
  • Nakamori, T.
  • Nolan, P. L.
  • Norris, J. P.
  • Nuss, E.
  • Ohno, M.
  • Ohsugi, T.
  • Omodei, N.
  • Orlando, E.
  • Ormes, J. F.
  • Paciesas, W. S.
  • Paneque, D.
  • Panetta, J. H.
  • Pelassa, V.
  • Pepe, M.
  • Pesce-Rollins, M.
  • Petrosian, V.
  • Piron, F.
  • Porter, T. A.
  • Preece, R.
  • Rainò, S.
  • Rando, R.
  • Rau, A.
  • Razzano, M.
  • Razzaque, S.
  • Reimer, A.
  • Reimer, O.
  • Reposeur, T.
  • Ritz, S.
  • Rochester, L. S.
  • Rodriguez, A. Y.
  • Roming, P. W. A.
  • Roth, M.
  • Ryde, F.
  • Sadrozinski, H. F.-W.
  • Sanchez, D.
  • Sander, A.
  • Saz Parkinson, P. M.
  • Scargle, J. D.
  • Schalk, T. L.
  • Sgrò, C.
  • Siskind, E. J.
  • Smith, P. D.
  • Spinelli, P.
  • Stamatikos, M.
  • Stecker, F. W.
  • Stratta, G.
  • Strickman, M. S.
  • Suson, D. J.
  • Swenson, C. A.
  • Tajima, H.
  • Takahashi, H.
  • Tanaka, T.
  • Thayer, J. B.
  • Thayer, J. G.
  • Thompson, D. J.
  • Tibaldo, L.
  • Torres, D. F.
  • Tosti, G.
  • Tramacere, A.
  • Uchiyama, Y.
  • Uehara, T.
  • Usher, T. L.
  • Van Der Horst, A. J.
  • Vasileiou, V.
  • Vilchez, N.
  • Vitale, V.
  • Von Kienlin, A.
  • Waite, A. P.
  • Wang, P.
  • Wilson-Hodge, C.
  • Winer, B. L.
  • Wood, K. S.
  • Yamazaki, R.
  • Ylinen, T.
  • Ziegler, M.
subjects:
  • Astrophysics - High Energy Astrophysical Phenomena
ispartof: The Astrophysical Journal, 2009, Vol.706(1), pp.L138-L144
description: We report on the observation of the bright, long gamma-ray burst (GRB), 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 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 toward 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 +2.7 3.5 GeV. This event arrived 82 s after the GBM trigger and 50 s 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.
language: eng
source:
identifier: ISSN: 0004-637X ; E-ISSN: 1538-4357 ; DOI: 10.1088/0004-637X/706/1/L138
fulltext: fulltext
issn:
  • 0004-637X
  • 1538-4357
  • 0004637X
  • 15384357
url: Link


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titlefermi observations of grb 090902b: a distinct spectral component in the prompt and delayed emission
creatorAbdo, A. A. ; Ackermann, M. ; Ajello, M. ; Asano, K. ; Atwood, W. B. ; Axelsson, M. ; Baldini, L. ; Ballet, J. ; Barbiellini, G. ; Baring, M. G. ; Bastieri, D. ; Bechtol, K. ; Bellazzini, R. ; Berenji, B. ; Bhat, P. N. ; Bissaldi, E. ; Blandford, R. D. ; Bloom, E. D. ; Bonamente, E. ; Borgland, A. W. ; Bouvier, A. ; Bregeon, J. ; Brez, A. ; Briggs, M. S. ; Brigida, M. ; Bruel, P. ; Burgess, J. M. ; Burrows, D. N. ; Buson, S. ; Caliandro, G. A. ; Cameron, R. A. ; Caraveo, P. A. ; Casandjian, J. M. ; Cecchi, C. ; Çelik, Ö. ; Chekhtman, A. ; Cheung, C. C. ; Chiang, J. ; Ciprini, S. ; Claus, R. ; Cohen-Tanugi, J. ; Cominsky, L. R. ; Connaughton, V. ; Conrad, J. ; Cutini, S. ; Delia, V. ; Dermer, C. D. ; De Angelis, A. ; De Palma, F. ; Digel, S. W. ; Dingus, B. L. ; Do Couto E Silva, E. ; Drell, P. S. ; Dubois, R. ; Dumora, D. ; Farnier, C. ; Favuzzi, C. ; Fegan, S. J. ; Finke, J. ; Fishman, G. ; Focke, W. B. ; Fortin, P. ; Frailis, M. ; Fukazawa, Y. ; Funk, S. ; Fusco, P. ; Gargano, F. ; Gehrels, N. ; Germani, S. ; Giavitto, G. ; Giebels, B. ; Giglietto, N. ; Giordano, F. ; Glanzman, T. ; Godfrey, G. ; Goldstein, A. ; Granot, J. ; Greiner, J. ; Grenier, I. A. ; Grove, J. E. ; Guillemot, L. ; Guiriec, S. ; Hanabata, Y. ; Harding, A. K. ; Hayashida, M. ; Hays, E. ; Horan, D. ; Hughes, R. E. ; Jackson, M. S. ; Jóhannesson, G. ; Johnson, A. S. ; Johnson, R. P. ; Johnson, W. N. ; Kamae, T. ; Katagiri, H. ; Kataoka, J. ; Kawai, N. ; Kerr, M. ; Kippen, R. M. ; Knödlseder, J. ; Kocevski, D. ; Komin, N. ; Kouveliotou, C. ; Kuss, M. ; Lande, J. ; Latronico, L. ; Lemoine-Goumard, M. ; Longo, F. ; Loparco, F. ; Lott, B. ; Lovellette, M. N. ; Lubrano, P. ; Madejski, G. M. ; Makeev, A. ; Mazziotta, M. N. ; Mcbreen, S. ; Mcenery, J. E. ; Mcglynn, S. ; Meegan, C. ; Mészáros, P. ; Meurer, C. ; Michelson, P. F. ; Mitthumsiri, W. ; Mizuno, T. ; Moiseev, A. A. ; Monte, C. ; Monzani, M. E. ; Moretti, E. ; Morselli, A. ; Moskalenko, I. V. ; Murgia, S. ; Nakamori, T. ; Nolan, P. L. ; Norris, J. P. ; Nuss, E. ; Ohno, M. ; Ohsugi, T. ; Omodei, N. ; Orlando, E. ; Ormes, J. F. ; Paciesas, W. S. ; Paneque, D. ; Panetta, J. H. ; Pelassa, V. ; Pepe, M. ; Pesce-Rollins, M. ; Petrosian, V. ; Piron, F. ; Porter, T. A. ; Preece, R. ; Rainò, S. ; Rando, R. ; Rau, A. ; Razzano, M. ; Razzaque, S. ; Reimer, A. ; Reimer, O. ; Reposeur, T. ; Ritz, S. ; Rochester, L. S. ; Rodriguez, A. Y. ; Roming, P. W. A. ; Roth, M. ; Ryde, F. ; Sadrozinski, H. F.-W. ; Sanchez, D. ; Sander, A. ; Saz Parkinson, P. M. ; Scargle, J. D. ; Schalk, T. L. ; Sgrò, C. ; Siskind, E. J. ; Smith, P. D. ; Spinelli, P. ; Stamatikos, M. ; Stecker, F. W. ; Stratta, G. ; Strickman, M. S. ; Suson, D. J. ; Swenson, C. A. ; Tajima, H. ; Takahashi, H. ; Tanaka, T. ; Thayer, J. B. ; Thayer, J. G. ; Thompson, D. J. ; Tibaldo, L. ; Torres, D. F. ; Tosti, G. ; Tramacere, A. ; Uchiyama, Y. ; Uehara, T. ; Usher, T. L. ; Van Der Horst, A. J. ; Vasileiou, V. ; Vilchez, N. ; Vitale, V. ; Von Kienlin, A. ; Waite, A. P. ; Wang, P. ; Wilson-Hodge, C. ; Winer, B. L. ; Wood, K. S. ; Yamazaki, R. ; Ylinen, T. ; Ziegler, M.
ispartofThe Astrophysical Journal, 2009, Vol.706(1), pp.L138-L144
identifier
descriptionWe report on the observation of the bright, long gamma-ray burst (GRB), 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 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 toward 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 +2.7 3.5 GeV. This event arrived 82 s after the GBM trigger and 50 s 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.
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creatorcontrib
0Abdo, A. A.
1Ackermann, M.
2Ajello, M.
3Asano, K.
4Atwood, W. B.
5Axelsson, M.
6Baldini, L.
7Ballet, J.
8Barbiellini, G.
9Baring, M. G.
10Bastieri, D.
11Bechtol, K.
12Bellazzini, R.
13Berenji, B.
14Bhat, P. N.
15Bissaldi, E.
16Blandford, R. D.
17Bloom, E. D.
18Bonamente, E.
19Borgland, A. W.
20Bouvier, A.
21Bregeon, J.
22Brez, A.
23Briggs, M. S.
24Brigida, M.
25Bruel, P.
26Burgess, J. M.
27Burrows, D. N.
28Buson, S.
29Caliandro, G. A.
30Cameron, R. A.
31Caraveo, P. A.
32Casandjian, J. M.
33Cecchi, C.
34Çelik, Ö.
35Chekhtman, A.
36Cheung, C. C.
37Chiang, J.
38Ciprini, S.
39Claus, R.
40Cohen-Tanugi, J.
41Cominsky, L. R.
42Connaughton, V.
43Conrad, J.
44Cutini, S.
45Delia, V.
46Dermer, C. D.
47De Angelis, A.
48De Palma, F.
49Digel, S. W.
50Dingus, B. L.
51Do Couto E Silva, E.
52Drell, P. S.
53Dubois, R.
54Dumora, D.
55Farnier, C.
56Favuzzi, C.
57Fegan, S. J.
58Finke, J.
59Fishman, G.
60Focke, W. B.
61Fortin, P.
62Frailis, M.
63Fukazawa, Y.
64Funk, S.
65Fusco, P.
66Gargano, F.
67Gehrels, N.
68Germani, S.
69Giavitto, G.
70Giebels, B.
71Giglietto, N.
72Giordano, F.
73Glanzman, T.
74Godfrey, G.
75Goldstein, A.
76Granot, J.
77Greiner, J.
78Grenier, I. A.
79Grove, J. E.
80Guillemot, L.
81Guiriec, S.
82Hanabata, Y.
83Harding, A. K.
84Hayashida, M.
85Hays, E.
86Horan, D.
87Hughes, R. E.
88Jackson, M. S.
89Jóhannesson, G.
90Johnson, A. S.
91Johnson, R. P.
92Johnson, W. N.
93Kamae, T.
94Katagiri, H.
95Kataoka, J.
96Kawai, N.
97Kerr, M.
98Kippen, R. M.
99Knödlseder, J.
100...
title
0FERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
1FERMI OBSERVATIONS OF GRB 090902B
2Fermi Observations of GRB 090902B: A Distinct Spectral Component in the Prompt and Delayed Emission
descriptionWe report on the observation of the bright, long gamma-ray burst (GRB), 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 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 toward 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 +2.7 3.5 GeV. This event arrived 82 s after the GBM trigger and 50 s 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.
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titlefermi observations of grb 090902b: a distinct spectral component in the prompt and delayed emission
creationdate20091120
authorAbdo, A. A. ; Ackermann, M. ; Ajello, M. ; Asano, K. ; Atwood, W. B. ; Axelsson, M. ; Baldini, L. ; Ballet, J. ; Barbiellini, G. ; Baring, M. G. ; Bastieri, D. ; Bechtol, K. ; Bellazzini, R. ; Berenji, B. ; Bhat, P. N. ; Bissaldi, E. ; Blandford, R. D. ; Bloom, E. D. ; Bonamente, E. ; Borgland, A. W. ; Bouvier, A. ; Bregeon, J. ; Brez, A. ; Briggs, M. S. ; Brigida, M. ; Bruel, P. ; Burgess, J. M. ; Burrows, D. N. ; Buson, S. ; Caliandro, G. A. ; Cameron, R. A. ; Caraveo, P. A. ; Casandjian, J. M. ; Cecchi, C. ; Çelik, Ö. ; Chekhtman, A. ; Cheung, C. C. ; Chiang, J. ; Ciprini, S. ; Claus, R. ; Cohen-Tanugi, J. ; Cominsky, L. R. ; Connaughton, V. ; Conrad, J. ; Cutini, S. ; Delia, V. ; Dermer, C. D. ; De Angelis, A. ; De Palma, F. ; Digel, S. W. ; Dingus, B. L. ; Do Couto E Silva, E. ; Drell, P. S. ; Dubois, R. ; Dumora, D. ; Farnier, C. ; Favuzzi, C. ; Fegan, S. J. ; Finke, J. ; Fishman, G. ; Focke, W. B. ; Fortin, P. ; Frailis, M. ; Fukazawa, Y. ; Funk, S. ; Fusco, P. ; Gargano, F. ; Gehrels, N. ; Germani, S. ; Giavitto, G. ; Giebels, B. ; Giglietto, N. ; Giordano, F. ; Glanzman, T. ; Godfrey, G. ; Goldstein, A. ; Granot, J. ; Greiner, J. ; Grenier, I. A. ; Grove, J. E. ; Guillemot, L. ; Guiriec, S. ; Hanabata, Y. ; Harding, A. K. ; Hayashida, M. ; Hays, E. ; Horan, D. ; Hughes, R. E. ; Jackson, M. S. ; Jóhannesson, G. ; Johnson, A. S. ; Johnson, R. P. ; Johnson, W. N. ; Kamae, T. ; Katagiri, H. ; Kataoka, J. ; Kawai, N. ; Kerr, M. ; Kippen, R. M. ; Knödlseder, J. ; Kocevski, D. ; Komin, N. ; Kouveliotou, C. ; Kuss, M. ; Lande, J. ; Latronico, L. ; Lemoine-Goumard, M. ; Longo, F. ; Loparco, F. ; Lott, B. ; Lovellette, M. N. ; Lubrano, P. ; Madejski, G. M. ; Makeev, A. ; Mazziotta, M. N. ; Mcbreen, S. ; Mcenery, J. E. ; Mcglynn, S. ; Meegan, C. ; Mészáros, P. ; Meurer, C. ; Michelson, P. F. ; Mitthumsiri, W. ; Mizuno, T. ; Moiseev, A. A. ; Monte, C. ; Monzani, M. E. ; Moretti, E. ; Morselli, A. ; Moskalenko, I. V. ; Murgia, S. ; Nakamori, T. ; Nolan, P. L. ; Norris, J. P. ; Nuss, E. ; Ohno, M. ; Ohsugi, T. ; Omodei, N. ; Orlando, E. ; Ormes, J. F. ; Paciesas, W. S. ; Paneque, D. ; Panetta, J. H. ; Pelassa, V. ; Pepe, M. ; Pesce-Rollins, M. ; Petrosian, V. ; Piron, F. ; Porter, T. A. ; Preece, R. ; Rainò, S. ; Rando, R. ; Rau, A. ; Razzano, M. ; Razzaque, S. ; Reimer, A. ; Reimer, O. ; Reposeur, T. ; Ritz, S. ; Rochester, L. S. ; Rodriguez, A. Y. ; Roming, P. W. A. ; Roth, M. ; Ryde, F. ; Sadrozinski, H. F.-W. ; Sanchez, D. ; Sander, A. ; Saz Parkinson, P. M. ; Scargle, J. D. ; Schalk, T. L. ; Sgrò, C. ; Siskind, E. J. ; Smith, P. D. ; Spinelli, P. ; Stamatikos, M. ; Stecker, F. W. ; Stratta, G. ; Strickman, M. S. ; Suson, D. J. ; Swenson, C. A. ; Tajima, H. ; Takahashi, H. ; Tanaka, T. ; Thayer, J. B. ; Thayer, J. G. ; Thompson, D. J. ; Tibaldo, L. ; Torres, D. F. ; Tosti, G. ; Tramacere, A. ; Uchiyama, Y. ; Uehara, T. ; Usher, T. L. ; Van Der Horst, A. J. ; Vasileiou, V. ; Vilchez, N. ; Vitale, V. ; Von Kienlin, A. ; Waite, A. P. ; Wang, P. ; Wilson-Hodge, C. ; Winer, B. L. ; Wood, K. S. ; Yamazaki, R. ; Ylinen, T. ; Ziegler, M.
facets
frbrgroupid8433320112569634447
frbrtype5
languageeng
creationdate2009
collectionIOPscience (Institute of Physics)
prefilterarticles
rsrctypearticles
creatorcontrib
0Abdo, A. A.
1Ackermann, M.
2Ajello, M.
3Asano, K.
4Atwood, W. B.
5Axelsson, M.
6Baldini, L.
7Ballet, J.
8Barbiellini, G.
9Baring, M. G.
10Bastieri, D.
11Bechtol, K.
12Bellazzini, R.
13Berenji, B.
14Bhat, P. N.
15Bissaldi, E.
16Blandford, R. D.
17Bloom, E. D.
18Bonamente, E.
19Borgland, A. W.
20Bouvier, A.
21Bregeon, J.
22Brez, A.
23Briggs, M. S.
24Brigida, M.
25Bruel, P.
26Burgess, J. M.
27Burrows, D. N.
28Buson, S.
29Caliandro, G. A.
30Cameron, R. A.
31Caraveo, P. A.
32Casandjian, J. M.
33Cecchi, C.
34Çelik, Ö.
35Chekhtman, A.
36Cheung, C. C.
37Chiang, J.
38Ciprini, S.
39Claus, R.
40Cohen-Tanugi, J.
41Cominsky, L. R.
42Connaughton, V.
43Conrad, J.
44Cutini, S.
45Delia, V.
46Dermer, C. D.
47De Angelis, A.
48De Palma, F.
49Digel, S. W.
50Dingus, B. L.
51Do Couto E Silva, E.
52Drell, P. S.
53Dubois, R.
54Dumora, D.
55Farnier, C.
56Favuzzi, C.
57Fegan, S. J.
58Finke, J.
59Fishman, G.
60Focke, W. B.
61Fortin, P.
62Frailis, M.
63Fukazawa, Y.
64Funk, S.
65Fusco, P.
66Gargano, F.
67Gehrels, N.
68Germani, S.
69Giavitto, G.
70Giebels, B.
71Giglietto, N.
72Giordano, F.
73Glanzman, T.
74Godfrey, G.
75Goldstein, A.
76Granot, J.
77Greiner, J.
78Grenier, I. A.
79Grove, J. E.
80Guillemot, L.
81Guiriec, S.
82Hanabata, Y.
83Harding, A. K.
84Hayashida, M.
85Hays, E.
86Horan, D.
87Hughes, R. E.
88Jackson, M. S.
89Jóhannesson, G.
90Johnson, A. S.
91Johnson, R. P.
92Johnson, W. N.
93Kamae, T.
94Katagiri, H.
95Kataoka, J.
96Kawai, N.
97Kerr, M.
98Kippen, R. M.
99Knödlseder, J.
100...
jtitleAstrophysical Journal
toplevelpeer_reviewed
delivery
delcategoryRemote Search Resource
fulltextfulltext
addata
aulast
0Abdo
1Ackermann
2Ajello
3Asano
4Atwood
5Axelsson
6Baldini
7Ballet
8Barbiellini
9Baring
10Bastieri
11Bechtol
12Bellazzini
13Berenji
14Bhat
15Bissaldi
16Blandford
17Bloom
18Bonamente
19Borgland
20Bouvier
21Bregeon
22Brez
23Briggs
24Brigida
25Bruel
26Burgess
27Burrows
28Buson
29Caliandro
30Cameron
31Caraveo
32Casandjian
33Cecchi
34Çelik
35Chekhtman
36Cheung
37Chiang
38Ciprini
39Claus
40Cohen-Tanugi
41Cominsky
42Connaughton
43Conrad
44Cutini
45dElia
46Dermer
47de Angelis
48de Palma
49Digel
50Dingus
51do Couto e Silva
52Drell
53Dubois
54Dumora
55Farnier
56Favuzzi
57Fegan
58Finke
59Fishman
60Focke
61Fortin
62Frailis
63Fukazawa
64Funk
65Fusco
66Gargano
67Gehrels
68Germani
69Giavitto
70Giebels
71Giglietto
72Giordano
73Glanzman
74Godfrey
75Goldstein
76Granot
77Greiner
78Grenier
79Grove
80Guillemot
81Guiriec
82Hanabata
83Harding
84Hayashida
85Hays
86Horan
87Hughes
88Jackson
89Jóhannesson
90Johnson
91Kamae
92Katagiri
93Kataoka
94Kawai
95Kerr
96Kippen
97Knödlseder
98Kocevski
99Komin
100...
aufirst
0A. A.
1M.
2K.
3W. B.
4L.
5J.
6G.
7M. G.
8D.
9R.
10B.
11P. N.
12E.
13R. D.
14E. D.
15A. W.
16A.
17M. S.
18P.
19J. M.
20D. N.
21S.
22G. A.
23R. A.
24P. A.
25C.
26Ö.
27C. C.
28L. R.
29V.
30C. D.
31F.
32S. W.
33B. L.
34P. S.
35S. J.
36Y.
37N.
38T.
39I. A.
40J. E.
41A. K.
42R. E.
43A. S.
44R. P.
45W. N.
46H.
47R. M.
48M. N.
49G. M.
50P. F.
51W.
52M. E.
53I. V.
54P. L.
55J. P.
56J. F.
57W. S.
58J. H.
59T. A.
60O.
61L. S.
62A. Y.
63P. W. A.
64H. F.-W.
65P. M.
66J. D.
67T. L.
68E. J.
69P. D.
70F. W.
71D. J.
72C. A.
73J. B.
74J. G.
75D. F.
76A. J.
77A. P.
78K. S.
au
0Abdo, A. A.
1Ackermann, M.
2Ajello, M.
3Asano, K.
4Atwood, W. B.
5Axelsson, M.
6Baldini, L.
7Ballet, J.
8Barbiellini, G.
9Baring, M. G.
10Bastieri, D.
11Bechtol, K.
12Bellazzini, R.
13Berenji, B.
14Bhat, P. N.
15Bissaldi, E.
16Blandford, R. D.
17Bloom, E. D.
18Bonamente, E.
19Borgland, A. W.
20Bouvier, A.
21Bregeon, J.
22Brez, A.
23Briggs, M. S.
24Brigida, M.
25Bruel, P.
26Burgess, J. M.
27Burrows, D. N.
28Buson, S.
29Caliandro, G. A.
30Cameron, R. A.
31Caraveo, P. A.
32Casandjian, J. M.
33Cecchi, C.
34Çelik, Ö.
35Chekhtman, A.
36Cheung, C. C.
37Chiang, J.
38Ciprini, S.
39Claus, R.
40Cohen-Tanugi, J.
41Cominsky, L. R.
42Connaughton, V.
43Conrad, J.
44Cutini, S.
45dElia, V.
46Dermer, C. D.
47de Angelis, A.
48de Palma, F.
49Digel, S. W.
50Dingus, B. L.
51do Couto e Silva, E.
52Drell, P. S.
53Dubois, R.
54Dumora, D.
55Farnier, C.
56Favuzzi, C.
57Fegan, S. J.
58Finke, J.
59Fishman, G.
60Focke, W. B.
61Fortin, P.
62Frailis, M.
63Fukazawa, Y.
64Funk, S.
65Fusco, P.
66Gargano, F.
67Gehrels, N.
68Germani, S.
69Giavitto, G.
70Giebels, B.
71Giglietto, N.
72Giordano, F.
73Glanzman, T.
74Godfrey, G.
75Goldstein, A.
76Granot, J.
77Greiner, J.
78Grenier, I. A.
79Grove, J. E.
80Guillemot, L.
81Guiriec, S.
82Hanabata, Y.
83Harding, A. K.
84Hayashida, M.
85Hays, E.
86Horan, D.
87Hughes, R. E.
88Jackson, M. S.
89Jóhannesson, G.
90Johnson, A. S.
91Johnson, R. P.
92Johnson, W. N.
93Kamae, T.
94Katagiri, H.
95Kataoka, J.
96Kawai, N.
97Kerr, M.
98Kippen, R. M.
99Knödlseder, J.
100...
atitleFERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
jtitleThe Astrophysical Journal
stitleFERMI OBSERVATIONS OF GRB 090902B
risdate20091120
volume706
issue1
spageL138
epageL144
issn0004-637X
eissn1538-4357
formatjournal
genrearticle
ristypeJOUR
abstractWe report on the observation of the bright, long gamma-ray burst (GRB), 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 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 toward 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 +2.7 3.5 GeV. This event arrived 82 s after the GBM trigger and 50 s 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.
doi10.1088/0004-637X/706/1/L138
pagesL138-L144
orcidid0000-0002-0014-7809: 0000-0001-6885-7156
date2009-11-20