Fermi Observations of GRB 090510: A Short Hard Gamma-Ray Burst with an Additional, Hard Power-Law Component from 10 keV to GeV Energies
- ACKERMANN, Markus
- ASANO, K.
- B. ATWOOD, W.
- AXELSSON, Magnus
- BALDINI, Luca
- BALLET, Jean
- BARBIELLINI, Guido
- G. BARING, M.
- BASTIERI, D.
- BECHTOL, K.
- BELLAZZINI, R.
- BERENJI, B.
- N. BHAT, P.
- BISSALDI, E.
- D. BLANDFORD, R.
- D. BLOOM, E.
- BONAMENTE, E.
- W. BORGLAND, A.
- BOUVIER, A.
- BREGEON, J.
- BREZ, A.
- S. BRIGGS, M.
- BRIGIDA, M.
- BRUEL, Pascal
- BUSON, S.
- A. CALIANDRO, G.
- A. CAMERON, R.
- CARAVEO, P. A.
- CARRIGAN, S.
- M. CASANDJIAN, J.
- CECCHI, C.
- CELIK, O.
- CHARLES, E.
- CHIANG, J.
- CIPRINI, S.
- CLAUS, R.
- COHEN-TANUGI, J.
- CONNAUGHTON, V.
- CONRAD, J.
- D. DERMER, C.
- DE PALMA, F.
- L. DINGUS, B.
- DO COUTO E SILVA, E.
- S. DRELL, P.
- DUBOIS, R.
- DUMORA, D.
- FARNIER, C.
- FAVUZZI, C.
- J. FEGAN, S.
- FINKE, J.
- B. FOCKE, W.
- FRAILIS, M.
- FUKAZAWA, Y.
- FUSCO, P.
- GARGANO, F.
- GASPARRINI, D.
- GEHRELS, N.
- GERMANI, S.
- GIGLIETTO, N.
- GIORDANO, F.
- GLANZMAN, T.
- GODFREY, G.
- GRANOT, J.
- A. GRENIER, I.
- GRONDIN, M.-H.
- E. GROVE, J.
- GUIRIEC, S.
- HADASCH, D.
- K. HARDING, A.
- HAYS, E.
- HORAN, D.
- E. HUGHES, R.
- JOHANNESSON, G.
- N. JOHNSON, W.
- KAMAE, T.
- KATAGIRI, H.
- KATAOKA, J.
- KAWAI, N.
- M. KIPPEN, R.
- KNÖDLSEDER, Jürgen
- KOCEVSKI, D.
- KOUVELIOTOU, C.
- KUSS, M.
- LANDE, J.
- LATRONICO, L.
- LEMOINE-GOUMARD, M.
- LLENA GARDE, M.
- LONGO, F.
- LOPARCO, F.
- LOTT, B.
- N. LOVELLETTE, M.
- LUBRANO, P.
- MAKEEV, A.
- N. MAZZIOTTA, M.
- E. MCENERY, J.
- MCGLYNN, S.
- MEEGAN, C.
- MESZAROS, P.
- F. MICHELSON, P.
- MITTHUMSIRI, W.
- MIZUNO, T.
- A. MOISEEV, A.
- MONTE, C.
- E. MONZANI, M.
- MORETTI, E.
- MORSELLI, A.
- V. MOSKALENKO, I.
- MURGIA, S.
- NAKAJIMA, H.
- NAKAMORI, T.
- L. NOLAN, P.
- P. NORRIS, J.
- NUSS, E.
- OHNO, M.
- OHSUGI, T.
- OMODEI, N.
- ORLANDO, E.
- F. ORMES, J.
- OZAKI, M.
- S. PACIESAS, W.
- PANEQUE, D.
- H. PANETTA, J.
- PARENT, D.
- PELASSA, V.
- PEPE, M.
- PESCE-ROLLINS, M.
- PIRON, F.
- PREECE, R.
- RAINO, S.
- RANDO, R.
- RAZZANO, M.
- RAZZAQUE, S.
- REIMER, A.
- RITZ, S.
- Y. RODRIGUEZ, A.
- ROTH, M.
- RYDE, F.
- F.-W. SADROZINSKI, H.
- SANDER, A.
- D. SCARGLE, J.
- L. SCHALK, T.
- SGRO, C.
- J. SISKIND, E.
- D. SMITH, P.
- SPANDRE, G.
- SPINELLI, P.
- STAMATIKOS, M.
- W. STECKER, F.
- S. STRICKMAN, M.
- J. SUSON, D.
- TAJIMA, H.
- TAKAHASHI, H.
- TAKAHASHI, T.
- TANAKA, T.
- B. THAYER, J.
- G. THAYER, J.
- J. THOMPSON, D.
- TIBALDO, L.
- TOMA, K.
- F. TORRES, D.
- TOSTI, G.
- TRAMACERE, A.
- UCHIYAMA, Y.
- UEHARA, T.
- L. USHER, T.
- J. VAN DER HORST, A.
- VASILEIOU, V.
- VILCHEZ, N.
- VITALE, V.
- VON KIENLIN, A.
- P. WAITE, A.
- WANG, P.
- WILSON-HODGE, C.
- L. WINER, B.
- F. WU, X.
- YAMAZAKI, R.
- YANG, Z.
- YLINEN, T.
- ZIEGLER, M.
DOIAbstract
We present detailed observations of the bright short-hard gamma-ray burst GRB 090510 made with the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) on board the Fermi observatory. GRB 090510 is the first burst detected by the LAT that shows strong evidence for a deviation from a Band spectral fitting function during the prompt emission phase. The time-integrated spectrum is fit by the sum of a Band function with $\Epeak = 3.9\pm 0.3$\,MeV, which is the highest yet measured, and a hard power-law component with photon index $-1.62\pm 0.03$ that dominates the emission below $\approx$\,20\,keV and above $\approx$\,100\,MeV. The onset of the high-energy spectral component appears to be delayed by $\sim$\,0.1\,s with respect to the on...
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