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FERMI OBSERVATIONS ...
FERMI OBSERVATIONS OF GRB 090902B : A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
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Abdo, A. A. (author)
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Ackermann, M. (author)
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Ajello, M. (author)
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show more...
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Asano, K. (author)
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Atwood, W. B. (author)
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- Axelsson, M. (author)
- Stockholms universitet,Institutionen för astronomi
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Baldini, L. (author)
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Ballet, J. (author)
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Barbiellini, G. (author)
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Baring, M. G. (author)
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Bastieri, D. (author)
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Bechtol, K. (author)
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Bellazzini, R. (author)
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Berenji, B. (author)
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Bhat, P. N. (author)
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Bissaldi, E. (author)
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Blandford, R. D. (author)
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Bloom, E. D. (author)
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Bonamente, E. (author)
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Borgland, A. W. (author)
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Bouvier, A. (author)
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Bregeon, J. (author)
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Brez, A. (author)
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Briggs, M. S. (author)
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Brigida, M. (author)
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Bruel, P. (author)
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Burgess, J. M. (author)
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Burrows, D. N. (author)
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Buson, S. (author)
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Caliandro, G. A. (author)
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Cameron, R. A. (author)
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Caraveo, P. A. (author)
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Casandjian, J. M. (author)
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Cecchi, C. (author)
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Celik, O. (author)
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Chekhtman, A. (author)
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Cheung, C. C. (author)
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Chiang, J. (author)
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Ciprini, S. (author)
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Claus, R. (author)
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Cohen-Tanugi, J. (author)
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Cominsky, L. R. (author)
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Connaughton, V. (author)
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- Conrad, Jan (author)
- Stockholms universitet,Fysikum
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Cutini, S. (author)
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d'Elia, V. (author)
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Dermer, C. D. (author)
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de Angelis, A. (author)
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de Palma, F. (author)
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Digel, S. W. (author)
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Dingus, B. L. (author)
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Silva, E. D. E. (author)
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Drell, P. S. (author)
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Dubois, R. (author)
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Dumora, D. (author)
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Farnier, C. (author)
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Favuzzi, C. (author)
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Fegan, S. J. (author)
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Finke, J. (author)
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Fishman, G. (author)
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Focke, W. B. (author)
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Fortin, P. (author)
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Frailis, M. (author)
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Fukazawa, Y. (author)
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Funk, S. (author)
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Fusco, P. (author)
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Gargano, F. (author)
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Gehrels, N. (author)
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Germani, S. (author)
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Giavitto, G. (author)
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Giebels, B. (author)
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Giglietto, N. (author)
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Giordano, F. (author)
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Glanzman, T. (author)
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Godfrey, G. (author)
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Goldstein, A. (author)
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Granot, J. (author)
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Greiner, J. (author)
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Grenier, I. A. (author)
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Grove, J. E. (author)
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Guillemot, L. (author)
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Guiriec, S. (author)
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Hanabata, Y. (author)
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Harding, A. K. (author)
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Hayashida, M. (author)
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Hays, E. (author)
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Horan, D. (author)
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Hughes, R. E. (author)
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Jackson, M. S. (author)
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Johannesson, G. (author)
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Johnson, A. S. (author)
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Johnson, R. P. (author)
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Johnson, W. N. (author)
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Kamae, T. (author)
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Katagiri, H. (author)
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Kataoka, J. (author)
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Kawai, N. (author)
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Kerr, M. (author)
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Kippen, R. M. (author)
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Knodlseder, J. (author)
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Kocevski, D. (author)
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Komin, N. (author)
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Kouveliotou, C. (author)
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Kuss, M. (author)
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Lande, J. (author)
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Latronico, L. (author)
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Lemoine-Goumard, M. (author)
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Longo, F. (author)
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Loparco, F. (author)
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Lott, B. (author)
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Lovellette, M. N. (author)
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Lubrano, P. (author)
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Madejski, G. M. (author)
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Makeev, A. (author)
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Mazziotta, M. N. (author)
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McBreen, S. (author)
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McEnery, J. E. (author)
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- McGlynn, Sinéad (author)
- KTH,Fysik
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Meegan, C. (author)
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Meszaros, P. (author)
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Meurer, C. (author)
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Michelson, P. F. (author)
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Mitthumsiri, W. (author)
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Mizuno, T. (author)
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Moiseev, A. A. (author)
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Monte, C. (author)
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Monzani, M. E. (author)
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Moretti, E. (author)
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Morselli, A. (author)
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Moskalenko, I. V. (author)
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Murgia, S. (author)
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Nakamori, T. (author)
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Nolan, P. L. (author)
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Norris, J. P. (author)
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Nuss, E. (author)
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Ohno, M. (author)
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Ohsugi, T. (author)
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Omodei, N. (author)
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Orlando, E. (author)
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Ormes, J. F. (author)
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Paciesas, W. S. (author)
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Paneque, D. (author)
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Panetta, J. H. (author)
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Pelassa, V. (author)
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Pepe, M. (author)
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Pesce-Rollins, M. (author)
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Petrosian, V. (author)
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Piron, F. (author)
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Porter, T. A. (author)
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Preece, R. (author)
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Raino, S. (author)
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Rando, R. (author)
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Rau, A. (author)
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Razzano, M. (author)
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Razzaque, S. (author)
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Reimer, A. (author)
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Reimer, O. (author)
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Reposeur, T. (author)
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Ritz, S. (author)
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Rochester, L. S. (author)
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Rodriguez, A. Y. (author)
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Roming, P. W. A. (author)
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Roth, M. (author)
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- Ryde, Felix (author)
- KTH,Partikel- och astropartikelfysik
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Sadrozinski, H. F. W. (author)
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Sanchez, D. (author)
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Sander, A. (author)
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Parkinson, P. M. S. (author)
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Scargle, J. D. (author)
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Schalk, T. L. (author)
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Sgro, C. (author)
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Siskind, E. J. (author)
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Smith, P. D. (author)
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Spinelli, P. (author)
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Stamatikos, M. (author)
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Stecker, F. W. (author)
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Stratta, G. (author)
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Strickman, M. S. (author)
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Suson, D. J. (author)
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Swenson, C. A. (author)
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Tajima, H. (author)
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Takahashi, H. (author)
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- Ylinen, T. (author)
- Högskolan i Kalmar,Naturvetenskapliga institutionen
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Thayer, J. B. (author)
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Thayer, J. G. (author)
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Thompson, D. J. (author)
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Tibaldo, L. (author)
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Torres, D. F. (author)
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Tosti, G. (author)
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Tramacere, A. (author)
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Uchiyama, Y. (author)
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Uehara, T. (author)
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Usher, T. L. (author)
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van der Horst, A. J. (author)
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Vasileiou, V. (author)
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Vilchez, N. (author)
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Vitale, V. (author)
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von Kienlin, A. (author)
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Waite, A. P. (author)
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Wang, P. (author)
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Wilson-Hodge, C. (author)
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Winer, B. L. (author)
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Wood, K. S. (author)
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Yamazaki, R. (author)
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- Ylinen, Tomi (author)
- KTH,Fysik
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Ziegler, M. (author)
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(creator_code:org_t)
- 2009
- 2009
- English.
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In: Astrophysical Journal Letters. - 2041-8205 .- 0004-637X .- 1538-4357. ; 706:1, s. L138-L144
- Related links:
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https://urn.kb.se/re...
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show more...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Subject headings
Close
- 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 similar to 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(-3.5)(+ 2.7) GeV. This event arrived 82 s after the GBM trigger and similar to 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- gamma rays: bursts
- gamma-ray burst
- high-energy
- batse observations
- redshift
- behavior
- photons
- 080514b
- mission
- 080916c
- escape
- High energy astrophysics
- Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Abdo, A. A.
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Ackermann, M.
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Ajello, M.
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Asano, K.
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Atwood, W. B.
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Axelsson, M.
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show more...
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Baldini, L.
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Ballet, J.
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Barbiellini, G.
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Baring, M. G.
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Bastieri, D.
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Bechtol, K.
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Bellazzini, R.
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Berenji, B.
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Bhat, P. N.
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Bissaldi, E.
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Blandford, R. D.
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Bloom, E. D.
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Bonamente, E.
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Borgland, A. W.
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Bouvier, A.
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Bregeon, J.
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Brez, A.
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Briggs, M. S.
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Brigida, M.
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Bruel, P.
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Burgess, J. M.
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Burrows, D. N.
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Buson, S.
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Caliandro, G. A.
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Cameron, R. A.
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Caraveo, P. A.
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Casandjian, J. M ...
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Cecchi, C.
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Celik, O.
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Chekhtman, A.
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Cheung, C. C.
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Chiang, J.
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Ciprini, S.
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Claus, R.
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Cohen-Tanugi, J.
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Cominsky, L. R.
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Connaughton, V.
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Conrad, Jan
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Cutini, S.
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d'Elia, V.
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Dermer, C. D.
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de Angelis, A.
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de Palma, F.
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Digel, S. W.
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Dingus, B. L.
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Silva, E. D. E.
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Drell, P. S.
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Dubois, R.
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Dumora, D.
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Farnier, C.
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Favuzzi, C.
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Fegan, S. J.
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Finke, J.
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Fishman, G.
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Focke, W. B.
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Fortin, P.
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Frailis, M.
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Fukazawa, Y.
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Funk, S.
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Fusco, P.
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Gargano, F.
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Gehrels, N.
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Germani, S.
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Giavitto, G.
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Giebels, B.
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Giglietto, N.
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Giordano, F.
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Glanzman, T.
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Godfrey, G.
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Goldstein, A.
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Granot, J.
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Greiner, J.
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Grenier, I. A.
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Grove, J. E.
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Guillemot, L.
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Guiriec, S.
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Hanabata, Y.
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Harding, A. K.
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Hayashida, M.
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Hays, E.
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Horan, D.
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Hughes, R. E.
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Jackson, M. S.
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Johannesson, G.
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Johnson, A. S.
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Johnson, R. P.
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Johnson, W. N.
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Kamae, T.
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Katagiri, H.
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Kataoka, J.
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Kawai, N.
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Kerr, M.
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Kippen, R. M.
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Knodlseder, J.
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Kocevski, D.
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Komin, N.
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Kouveliotou, C.
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Kuss, M.
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Lande, J.
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Latronico, L.
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Lemoine-Goumard, ...
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Longo, F.
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Loparco, F.
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Lott, B.
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Lovellette, M. N ...
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Lubrano, P.
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Madejski, G. M.
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Makeev, A.
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Mazziotta, M. N.
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McBreen, S.
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McEnery, J. E.
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McGlynn, Sinéad
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Meegan, C.
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Meszaros, P.
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Meurer, C.
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Michelson, P. F.
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Mitthumsiri, W.
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Mizuno, T.
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Moiseev, A. A.
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Monte, C.
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Monzani, M. E.
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Moretti, E.
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Morselli, A.
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Moskalenko, I. V ...
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Murgia, S.
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Nakamori, T.
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Nolan, P. L.
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Norris, J. P.
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Nuss, E.
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Ohno, M.
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Ohsugi, T.
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Omodei, N.
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Orlando, E.
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Ormes, J. F.
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Paciesas, W. S.
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Paneque, D.
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Panetta, J. H.
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Pelassa, V.
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Pepe, M.
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Pesce-Rollins, M ...
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Petrosian, V.
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Piron, F.
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Porter, T. A.
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Preece, R.
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Raino, S.
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Rando, R.
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Rau, A.
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Razzano, M.
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Razzaque, S.
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Reimer, A.
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Reimer, O.
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Reposeur, T.
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Ritz, S.
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Rochester, L. S.
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Rodriguez, A. Y.
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Roming, P. W. A.
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Roth, M.
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Ryde, Felix
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Sadrozinski, H. ...
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Sanchez, D.
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Sander, A.
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Parkinson, P. M. ...
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Scargle, J. D.
-
Schalk, T. L.
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Sgro, C.
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Siskind, E. J.
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Smith, P. D.
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Spinelli, P.
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Stamatikos, M.
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Stecker, F. W.
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Stratta, G.
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Strickman, M. S.
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Suson, D. J.
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Swenson, C. A.
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Tajima, H.
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Takahashi, H.
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Ylinen, T.
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Thayer, J. B.
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Thayer, J. G.
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Thompson, D. J.
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Tibaldo, L.
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Torres, D. F.
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Tosti, G.
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Tramacere, A.
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Uchiyama, Y.
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Uehara, T.
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Usher, T. L.
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van der Horst, A ...
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Vasileiou, V.
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Vilchez, N.
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Vitale, V.
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von Kienlin, A.
-
Waite, A. P.
-
Wang, P.
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Wilson-Hodge, C.
-
Winer, B. L.
-
Wood, K. S.
-
Yamazaki, R.
-
Ylinen, Tomi
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Ziegler, M.
-
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- By the university
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Royal Institute of Technology
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Stockholm University
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Linnaeus University