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GRB110721A : AN EXTREME PEAK ENERGY AND SIGNATURES OF THE PHOTOSPHERE

Axelsson, Magnus (author)
KTH,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Royal Institute of Technology, Sweden,Partikel- och astropartikelfysik
Baldini, L. (author)
Barbiellini, G. (author)
show more...
Baring, M. G. (author)
Bellazzini, R. (author)
Bregeon, J. (author)
Brigida, M. (author)
Bruel, P. (author)
Buehler, R. (author)
Caliandro, G. A. (author)
Cameron, R. A. (author)
Caraveo, P. A. (author)
Cecchi, C. (author)
Chaves, R. C. G. (author)
Chekhtman, A. (author)
Chiang, J. (author)
Claus, R. (author)
Conrad, Jan (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Royal Swedish Academy of Sciences, Sweden
Cutini, S. (author)
D'Ammando, F. (author)
de Palma, F. (author)
Dermer, C. D. (author)
do Couto e Silva, E. (author)
Drell, P. S. (author)
Favuzzi, C. (author)
Fegan, S. J. (author)
Ferrara, E. C. (author)
Focke, W. B. (author)
Fukazawa, Y. (author)
Fusco, P. (author)
Gargano, F. (author)
Gasparrini, D. (author)
Gehrels, N. (author)
Germani, S. (author)
Giglietto, N. (author)
Giroletti, M. (author)
Godfrey, G. (author)
Guiriec, S. (author)
Hadasch, D. (author)
Hanabata, Y. (author)
Hayashida, M. (author)
Hou, X. (author)
Iyyani, Shabnam (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Royal Institute of Technology Sweden
Jackson, Miranda (author)
KTH,Partikel- och astropartikelfysik
Kocevski, D. (author)
Kuss, M. (author)
Larsson, J. (author)
Stockholms universitet,Oskar Klein-centrum för kosmopartikelfysik (OKC),Institutionen för astronomi
Larsson, Stefan (author)
Stockholms universitet,Institutionen för astronomi,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
Longo, F. (author)
Loparco, F. (author)
Lundman, Christoffer (author)
KTH,Partikel- och astropartikelfysik
Mazziotta, M. N. (author)
McEnery, J. E. (author)
Mizuno, T. (author)
Moretti, Elena (author)
KTH,Partikel- och astropartikelfysik
Moretti, E. (author)
Morselli, A. (author)
Murgia, S. (author)
Nuss, E. (author)
Nymark, Tanja (author)
KTH,Partikel- och astropartikelfysik
Ohno, M. (author)
Omodei, N. (author)
Pesce-Rollins, M. (author)
Piron, F. (author)
Pivato, G. (author)
Racusin, J. L. (author)
Raino, S. (author)
Razzano, M. (author)
Razzaque, S. (author)
Reimer, A. (author)
Roth, M. (author)
Ryde, F. (author)
Sanchez, D. A. (author)
Sgro, C. (author)
Siskind, E. J. (author)
Spandre, G. (author)
Spinelli, P. (author)
Stamatikos, M. (author)
Tibaldo, L. (author)
Tinivella, M. (author)
Usher, T. L. (author)
Vandenbroucke, J. (author)
Vasileiou, V. (author)
Vianello, G. (author)
Vitale, V. (author)
Waite, A. P. (author)
Winer, B. L. (author)
Wood, K. S. (author)
Burgess, J. M. (author)
Bhat, P. N. (author)
Bissaldi, E. (author)
Briggs, M. S. (author)
Connaughton, V. (author)
Fishman, G. (author)
Fitzpatrick, G. (author)
Foley, S. (author)
Gruber, D. (author)
Kippen, R. M. (author)
Kouveliotou, C. (author)
Jenke, P. (author)
McBreen, S. (author)
McGlynn, S. (author)
Meegan, C. (author)
Paciesas, W. S. (author)
Pelassa, V. (author)
Preece, R. (author)
Tierney, D. (author)
von Kienlin, A. (author)
Wilson-Hodge, C. (author)
Xiong, S. (author)
Pe'er, A. (author)
show less...
 (creator_code:org_t)
2012
2012
English.
In: Astrophysical Journal Letters. - 2041-8205. ; 757:2
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The burst consisted of one major emission episode which lasted for similar to 24.5 s (in the GBM) and had a peak flux of (5.7 +/- 0.2) x 10(-5) erg s(-1) cm(-2). The time-resolved emission spectrum is best modeled with a combination of a Band function and a blackbody spectrum. The peak energy of the Band component was initially 15 +/- 2 MeV, which is the highest value ever detected in a GRB. This measurement was made possible by combining GBM/BGO data with LAT Low Energy events to achieve continuous 10-100 MeV coverage. The peak energy later decreased as a power law in time with an index of -1.89 +/- 0.10. The temperature of the blackbody component also decreased, starting from similar to 80 keV, and the decay showed a significant break after similar to 2 s. The spectrum provides strong constraints on the standard synchrotron model, indicating that alternative mechanisms may give rise to the emission at these energies.

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: general
gamma-ray burst: individual (GRB110721A)
radiation mechanisms: thermal

Publication and Content Type

ref (subject category)
art (subject category)

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By the author/editor
Axelsson, Magnus
Baldini, L.
Barbiellini, G.
Baring, M. G.
Bellazzini, R.
Bregeon, J.
show more...
Brigida, M.
Bruel, P.
Buehler, R.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Cecchi, C.
Chaves, R. C. G.
Chekhtman, A.
Chiang, J.
Claus, R.
Conrad, Jan
Cutini, S.
D'Ammando, F.
de Palma, F.
Dermer, C. D.
do Couto e Silva ...
Drell, P. S.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Focke, W. B.
Fukazawa, Y.
Fusco, P.
Gargano, F.
Gasparrini, D.
Gehrels, N.
Germani, S.
Giglietto, N.
Giroletti, M.
Godfrey, G.
Guiriec, S.
Hadasch, D.
Hanabata, Y.
Hayashida, M.
Hou, X.
Iyyani, Shabnam
Jackson, Miranda
Kocevski, D.
Kuss, M.
Larsson, J.
Larsson, Stefan
Longo, F.
Loparco, F.
Lundman, Christo ...
Mazziotta, M. N.
McEnery, J. E.
Mizuno, T.
Moretti, Elena
Moretti, E.
Morselli, A.
Murgia, S.
Nuss, E.
Nymark, Tanja
Ohno, M.
Omodei, N.
Pesce-Rollins, M ...
Piron, F.
Pivato, G.
Racusin, J. L.
Raino, S.
Razzano, M.
Razzaque, S.
Reimer, A.
Roth, M.
Ryde, F.
Sanchez, D. A.
Sgro, C.
Siskind, E. J.
Spandre, G.
Spinelli, P.
Stamatikos, M.
Tibaldo, L.
Tinivella, M.
Usher, T. L.
Vandenbroucke, J ...
Vasileiou, V.
Vianello, G.
Vitale, V.
Waite, A. P.
Winer, B. L.
Wood, K. S.
Burgess, J. M.
Bhat, P. N.
Bissaldi, E.
Briggs, M. S.
Connaughton, V.
Fishman, G.
Fitzpatrick, G.
Foley, S.
Gruber, D.
Kippen, R. M.
Kouveliotou, C.
Jenke, P.
McBreen, S.
McGlynn, S.
Meegan, C.
Paciesas, W. S.
Pelassa, V.
Preece, R.
Tierney, D.
von Kienlin, A.
Wilson-Hodge, C.
Xiong, S.
Pe'er, A.
show less...
About the subject
NATURAL SCIENCES
NATURAL SCIENCES
and Physical Science ...
NATURAL SCIENCES
NATURAL SCIENCES
and Physical Science ...
and Astronomy Astrop ...
Articles in the publication
Astrophysical Jo ...
By the university
Stockholm University
Royal Institute of Technology

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