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DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A
- Ackermann, M. (author)
- Ajello, M. (author)
- Asano, K. (author)
- show more...
- Baldini, L. (author)
- Ballet, J. (author)
- Barbiellini, G. (author)
- Baring, M. G. (author)
- Bastieri, D. (author)
- Bechtol, K. (author)
- Bellazzini, R. (author)
- Berenji, B. (author)
- Bhat, P. N. (author)
- Bissaldi, E. (author)
- Blandford, R. D. (author)
- Bonamente, E. (author)
- Borgland, A. W. (author)
- Bouvier, A. (author)
- Bregeon, J. (author)
- Brez, A. (author)
- Brigida, M. (author)
- Bruel, P. (author)
- Buehler, R. (author)
- Buson, S. (author)
- Caliandro, G. A. (author)
- Cameron, R. A. (author)
- Caraveo, P. A. (author)
- Carrigan, S. (author)
- Casandjian, J. M. (author)
- Cecchi, C. (author)
- Celik, O. (author)
- Chaplin, V. (author)
- Charles, E. (author)
- Chekhtman, A. (author)
- Chiang, J. (author)
- Ciprini, S. (author)
- Claus, R. (author)
- Cohen-Tanugi, J. (author)
- Connaughton, V. (author)
- Cutini, S. (author)
- Dermer, C. D. (author)
- De Angelis, A. (author)
- De Palma, F. (author)
- Dingus, B. L. (author)
- Silva, E. Do Couto E. (author)
- Drell, P. S. (author)
- Dubois, R. (author)
- Favuzzi, C. (author)
- Fegan, S. J. (author)
- Ferrara, E. C. (author)
- Focke, W. B. (author)
- Frailis, M. (author)
- Fukazawa, Y. (author)
- Funk, S. (author)
- Fusco, P. (author)
- Gargano, F. (author)
- Gasparrini, D. (author)
- Gehrels, N. (author)
- Germani, S. (author)
- Giglietto, N. (author)
- Giordano, F. (author)
- Giroletti, M. (author)
- Glanzman, T. (author)
- Godfrey, G. (author)
- Goldstein, A. (author)
- Granot, J. (author)
- Greiner, J. (author)
- Grenier, I. A. (author)
- Grove, J. E. (author)
- Guiriec, S. (author)
- Hadasch, D. (author)
- Hanabata, Y. (author)
- Harding, A. K. (author)
- Hayashi, K. (author)
- Hayashida, M. (author)
- Hays, E. (author)
- Horan, D. (author)
- Hughes, R. E. (author)
- Itoh, R. (author)
- Johannesson, G. (author)
- Johnson, A. S. (author)
- Johnson, W. N. (author)
- Kamae, T. (author)
- Katagiri, H. (author)
- Kataoka, J. (author)
- Kippen, R. M. (author)
- Knoedlseder, J. (author)
- Kocevski, D. (author)
- Kouveliotou, C. (author)
- Kuss, M. (author)
- Lande, J. (author)
- Latronico, L. (author)
- Lee, S. -H (author)
- Longo, F. (author)
- Loparco, F. (author)
- Lovellette, M. N. (author)
- Lubrano, P. (author)
- Makeev, A. (author)
- Mazziotta, M. N. (author)
- McBreen, S. (author)
- McEnery, J. E. (author)
- McGlynn, S. (author)
- Meegan, C. (author)
- Mehault, J. (author)
- Meszaros, P. (author)
- Michelson, P. F. (author)
- Mizuno, T. (author)
- Monte, C. (author)
- Moretti, E. (author)
- Morselli, A. (author)
- Moskalenko, I. V. (author)
- Murgia, S. (author)
- Nakajima, H. (author)
- Nakamori, T. (author)
- Naumann-Godo, M. (author)
- Nishino, S. (author)
- Nolan, P. L. (author)
- Norris, J. P. (author)
- Nuss, E. (author)
- Ohno, M. (author)
- Ohsugi, T. (author)
- Okumura, A. (author)
- Omodei, N. (author)
- Orlando, E. (author)
- Ormes, J. F. (author)
- Ozaki, M. (author)
- Paciesas, W. S. (author)
- Paneque, D. (author)
- Panetta, J. H. (author)
- Parent, D. (author)
- Pelassa, V. (author)
- Pepe, M. (author)
- Pesce-Rollins, M. (author)
- Petrosian, V. (author)
- Piron, F. (author)
- Porter, T. A. (author)
- Preece, R. (author)
- Racusin, J. L. (author)
- Raino, S. (author)
- Rando, R. (author)
- Rau, A. (author)
- Razzano, M. (author)
- Razzaque, S. (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Reposeur, T. (author)
- Reyes, L. C. (author)
- Ritz, S. (author)
- Roth, M. (author)
- Sadrozinski, H. F. -W (author)
- Sander, A. (author)
- Scargle, J. D. (author)
- Strickman, M. S. (author)
- Suson, D. J. (author)
- Tajima, H. (author)
- Takahashi, H. (author)
- Tanaka, T. (author)
- Tanaka, Y. (author)
- Thayer, J. B. (author)
- Thayer, J. G. (author)
- Tibaldo, L. (author)
- Tierney, D. (author)
- Toma, K. (author)
- Torres, D. F. (author)
- Tosti, G. (author)
- Tramacere, A. (author)
- Uchiyama, Y. (author)
- Uehara, T. (author)
- Usher, T. L. (author)
- Vandenbroucke, J. (author)
- van der Horst, A. J. (author)
- Vasileiou, V. (author)
- Vilchez, N. (author)
- Vitale, V. (author)
- von Kienlin, A. (author)
- Waite, A. P. (author)
- Wang, P. (author)
- Wilson-Hodge, C. (author)
- Winer, B. L. (author)
- Wood, K. S. (author)
- Wu, X. F. (author)
- Yamazaki, R. (author)
- Ziegler, M. (author)
- show less...
- (creator_code:org_t)
- 2011
- 2011
- English.
- In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 729:2, s. 114-
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- We report on the observation of the bright, long gamma-ray burst, GRB 090926A, by the Gamma-ray Burst Monitor and Large Area Telescope (LAT) instruments on board the Fermi Gamma-ray Space Telescope. GRB 090926A shares several features with other bright LAT bursts. In particular, it clearly shows a short spike in the light curve that is present in all detectors that see the burst, and this in turn suggests that there is a common region of emission across the entire Fermi energy range. In addition, while a separate high-energy power-law component has already been observed in other gamma-ray bursts, here we report for the first time the detection with good significance of a high-energy spectral break (or cutoff) in this power-law component around 1.4 GeV in the time-integrated spectrum. If the spectral break is caused by opacity to electron-positron pair production within the source, then this observation allows us to compute the bulk Lorentz factor for the outflow, rather than a lower limit.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- gamma-ray burst: individual (GRB 090926A)
- gamma-ray burst: individual (GRB 090926A)
- Astronomy and astrophysics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
- Ackermann, M.
- Ajello, M.
- Asano, K.
- Axelsson, Magnus
- Baldini, L.
- Ballet, J.
- show more...
- Barbiellini, G.
- Baring, M. G.
- Bastieri, D.
- Bechtol, K.
- Bellazzini, R.
- Berenji, B.
- Bhat, P. N.
- Bissaldi, E.
- Blandford, R. D.
- Bonamente, E.
- Borgland, A. W.
- Bouvier, A.
- Bregeon, J.
- Brez, A.
- McGlynn, Sinead
- Brigida, M.
- Bruel, P.
- Buehler, R.
- Buson, S.
- Caliandro, G. A.
- Cameron, R. A.
- Caraveo, P. A.
- Carrigan, S.
- Casandjian, J. M ...
- Cecchi, C.
- Celik, O.
- Chaplin, V.
- Charles, E.
- Chekhtman, A.
- Chiang, J.
- Ciprini, S.
- Claus, R.
- Cohen-Tanugi, J.
- Connaughton, V.
- Conrad, Jan
- Cutini, S.
- Dermer, C. D.
- De Angelis, A.
- De Palma, F.
- Dingus, B. L.
- Silva, E. Do Cou ...
- Drell, P. S.
- Dubois, R.
- Favuzzi, C.
- Fegan, S. J.
- Ferrara, E. C.
- Focke, W. B.
- Frailis, M.
- Fukazawa, Y.
- Funk, S.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Gehrels, N.
- Germani, S.
- Giglietto, N.
- Giordano, F.
- Giroletti, M.
- Glanzman, T.
- Godfrey, G.
- Goldstein, A.
- Granot, J.
- Greiner, J.
- Grenier, I. A.
- Grove, J. E.
- Guiriec, S.
- Hadasch, D.
- Hanabata, Y.
- Harding, A. K.
- Hayashi, K.
- Hayashida, M.
- Hays, E.
- Horan, D.
- Hughes, R. E.
- Itoh, R.
- Johannesson, G.
- Johnson, A. S.
- Johnson, W. N.
- Kamae, T.
- Katagiri, H.
- Kataoka, J.
- Kippen, R. M.
- Knoedlseder, J.
- Kocevski, D.
- Kouveliotou, C.
- Kuss, M.
- Lande, J.
- Latronico, L.
- Lee, S. -H
- Garde, Maja Llen ...
- Longo, F.
- Loparco, F.
- Lovellette, M. N ...
- Lubrano, P.
- Makeev, A.
- Mazziotta, M. N.
- McBreen, S.
- McEnery, J. E.
- McGlynn, S.
- Meegan, C.
- Mehault, J.
- Meszaros, P.
- Michelson, P. F.
- Mizuno, T.
- Monte, C.
- Moretti, Elena, ...
- Moretti, E.
- Morselli, A.
- Moskalenko, I. V ...
- Murgia, S.
- Nakajima, H.
- Nakamori, T.
- Naumann-Godo, M.
- Nishino, S.
- Nolan, P. L.
- Norris, J. P.
- Nuss, E.
- Ohno, M.
- Ohsugi, T.
- Okumura, A.
- Omodei, N.
- Orlando, E.
- Ormes, J. F.
- Ozaki, M.
- Paciesas, W. S.
- Paneque, D.
- Panetta, J. H.
- Parent, D.
- Pelassa, V.
- Pepe, M.
- Pesce-Rollins, M ...
- Petrosian, V.
- Piron, F.
- Porter, T. A.
- Preece, R.
- Racusin, J. L.
- Raino, S.
- Rando, R.
- Rau, A.
- Razzano, M.
- Razzaque, S.
- Reimer, A.
- Reimer, O.
- Reposeur, T.
- Reyes, L. C.
- Ripken, Joachim
- Ritz, S.
- Roth, M.
- Ryde, Felix
- Sadrozinski, H. ...
- Sander, A.
- Scargle, J. D.
- Strickman, M. S.
- Suson, D. J.
- Tajima, H.
- Takahashi, H.
- Tanaka, T.
- Tanaka, Y.
- Thayer, J. B.
- Thayer, J. G.
- Tibaldo, L.
- Tierney, D.
- Toma, K.
- Torres, D. F.
- Tosti, G.
- Tramacere, A.
- Uchiyama, Y.
- Uehara, T.
- Usher, T. L.
- Vandenbroucke, J ...
- van der Horst, A ...
- Vasileiou, V.
- Vilchez, N.
- Vitale, V.
- von Kienlin, A.
- Waite, A. P.
- Wang, P.
- Wilson-Hodge, C.
- Winer, B. L.
- Wood, K. S.
- Wu, X. F.
- Yamazaki, R.
- Yang, Zhaoyu
- Ylinen, Tomi
- Ziegler, M.
- show less...
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- NATURAL SCIENCES
- NATURAL SCIENCES
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