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DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A
Ackermann, M.2,3; Ajello, M.2,3; Asano, K.4; Axelsson, M.5,6,7; Baldini, L.1; Ballet, J.8; Barbiellini, G.9,10; Baring, M. G.11; Bastieri, D.12,13; Bechtol, K.2,3; Bellazzini, R.1; Berenji, B.2,3; Bhat, P. N.14; Bissaldi, E.15; Blandford, R. D.2,3; Bonamente, E.16,17; Borgland, A. W.2,3; Bouvier, A.2,3,40; Bregeon, J.1; Brez, A.1,2; Briggs, M. S.14; Brigida, M.18,19; Bruel, P.20; Buehler, R.2,3; Buson, S.12,13; Caliandro, G. A.21; Cameron, R. A.2,3; Caraveo, P. A.22; Carrigan, S.13; Casandjian, J. M.8; Cecchi, C.16,17; Celik, O.23,24,25,26; Chaplin, V.14; Charles, E.2,3; Chekhtman, A.27,28; Chiang, J.2,3; Ciprini, S.17; Claus, R.2,3; Cohen-Tanugi, J.29; Connaughton, V.14; Conrad, J.7,30,73; Cutini, S.31; Dermer, C. D.27; De Angelis, A.32,33; De Palma, F.18,19; Dingus, B. L.34; Silva, E. Do Couto E.2,3; Drell, P. S.2,3; Dubois, R.2,3; Favuzzi, C.18,19; Fegan, S. J.20; Ferrara, E. C.23; Focke, W. B.2,3; Frailis, M.32,33,35; Fukazawa, Y.36; Funk, S.2,3; Fusco, P.18,19; Gargano, F.19; Gasparrini, D.31; Gehrels, N.23; Germani, S.16,17; Giglietto, N.18,19; Giordano, F.18,19; Giroletti, M.37; Glanzman, T.2,3; Godfrey, G.2,3; Goldstein, A.1,14; Granot, J.38; Greiner, J.15; Grenier, I. A.8; Grove, J. E.27; Guiriec, S.14; Hadasch, D.21; Hanabata, Y.36; Harding, A. K.23; Hayashi, K.36; Hayashida, M.2,3; Hays, E.23; Horan, D.20; Hughes, R. E.39; Itoh, R.36; Johannesson, G.2,3; Johnson, A. S.2,3; Johnson, W. N.27; Kamae, T.2,3; Katagiri, H.36; Kataoka, J.40; Kippen, R. M.34; Knoedlseder, J.41; Kocevski, D.2,3; Kouveliotou, C.42; Kuss, M.1; Lande, J.2,3; Latronico, L.1; Lee, S. -H.2,3; Garde, M. Llena7,30; Longo, F.9,10; Loparco, F.18,19; Lovellette, M. N.27; Lubrano, P.12,16,17; Makeev, A.27,28; Mazziotta, M. N.19; McBreen, S.15,43; McEnery, J. E.23,44,45; McGlynn, S.7,46; Meegan, C.47; Mehault, J.29; Meszaros, P.48; Michelson, P. F.2,3; Mizuno, T.36; Monte, C.18,19; Monzani, M. E.2,3; Moretti, E.7,46; Morselli, A.49; Moskalenko, I. V.2,3; Murgia, S.2,3; Nakajima, H.50; Nakamori, T.40; Naumann-Godo, M.8; Nishino, S.36; Nolan, P. L.2,3; Norris, J. P.51; Nuss, E.29; Ohno, M.52; Ohsugi, T.53; Okumura, A.52; Omodei, N.2,3; Orlando, E.15; Ormes, J. F.51; Ozaki, M.52; Paciesas, W. S.14; Paneque, D.2,3; Panetta, J. H.2,3; Parent, D.27,28; Pelassa, V.29; Pepe, M.16,17; Pesce-Rollins, M.1; Petrosian, V.2,3; Piron, F.29; Porter, T. A.2,3; Preece, R.1,14; Racusin, J. L.23; Raino, S.18,19; Rando, R.12,13; Rau, A.15; Razzano, M.1; Razzaque, S.27,54; Reimer, A.2,3,55,56; Reimer, O.2,3,55,56; Reposeur, T.57; Reyes, L. C.58; Ripken, J.7,30; Ritz, S.59,60; Roth, M.61; Ryde, F.7,46; Sadrozinski, H. F. -W.59,60; Sander, A.39; Scargle, J. D.62; Strickman, M. S.27; Suson, D. J.64; Tajima, H.2,3; Takahashi, H.1,53; Tanaka, T.2,3; Tanaka, Y.52; Thayer, J. B.2,3; Thayer, J. G.2,3; Tibaldo, L.12,13,74; Tierney, D.43; Toma, K.1,48; Torres, D. F.21,65; Tosti, G.16,17; Tramacere, A.2,3,66,67; Uchiyama, Y.2,3; Uehara, T.1,36; Usher, T. L.2,3; Vandenbroucke, J.2,3; van der Horst, A. J.42,75; Vasileiou, V.23,24,25,26; Vilchez, N.41; Vitale, V.49,68; von Kienlin, A.15; Waite, A. P.2,3; Wang, P.2,3; Wilson-Hodge, C.42; Winer, B. L.39; Wood, K. S.27; Wu, X. F.48,69,70; Yamazaki, R.71; Yang, Z.7,30; Ylinen, T.7,46,72; Ziegler, M.59,60
2011-03-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume729Issue:2Pages:114(12pp)
AbstractWe 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.
KeywordGamma-ray Burst: Individual (Grb 090926a)
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/729/2/114
WOS KeywordGAMMA-RAY BURSTS ; LARGE-AREA TELESCOPE ; FERMI OBSERVATIONS ; LORENTZ FACTOR ; GEV EMISSION ; AFTERGLOW ; SWIFT ; 080916C ; IDENTIFICATION ; RADIATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000288608700037
Citation statistics
Cited Times:130[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4475
Collection南极天文中心
Affiliation1.Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy
2.Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA
3.Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA
4.Tokyo Inst Technol, Interact Res Ctr Sci, Meguro, Tokyo 1528551, Japan
5.Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden
6.Lund Observ, SE-22100 Lund, Sweden
7.Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden
8.Univ Paris 06, CEA Saclay, Serv Astrophys, Lab AIM,CEA,IRFU,CNRS, F-91191 Gif Sur Yvette, France
9.Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
10.Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy
11.Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA
12.Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
13.Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy
14.Univ Alabama, CSPAR, Huntsville, AL 35899 USA
15.Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
16.Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy
17.Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy
18.Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy
19.Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
20.Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
21.Inst Ciencies Espai IEEC CSIC, Barcelona 08193, Spain
22.INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy
23.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
24.CRESST, Greenbelt, MD 20771 USA
25.Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA
26.Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA
27.Div Space Sci, Naval Res Lab, Washington, DC 20375 USA
28.George Mason Univ, Coll Sci, Ctr Earth Observat & Space Res, Fairfax, VA 22030 USA
29.Univ Montpellier 2, Lab Phys Theor & Astroparticules, CNRS, IN2P3, Montpellier, France
30.Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden
31.ASI, Sci Data Ctr, I-00044 Rome, Italy
32.Univ Udine, Dipartimento Fis, I-33100 Udine, Italy
33.Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy
34.Los Alamos Natl Lab, Los Alamos, NM 87545 USA
35.Ist Nazl Astrofis, Osservatorio Astron Trieste, I-34143 Trieste, Italy
36.Hiroshima Univ, Dept Phys Sci, Higashihiroshima, Hiroshima 7398526, Japan
37.INAF, Ist Radioastron, I-40129 Bologna, Italy
38.Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
39.Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
40.Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan
41.Ctr Etud Spatiale Rayonnements, CNRS UPS, F-30128 Toulouse 4, France
42.NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA
43.Univ Coll Dublin, Sch Phys, Dublin 4, Ireland
44.Univ Maryland, Dept Phys, College Pk, MD 20742 USA
45.Univ Maryland, Dept Astron, College Pk, MD 20742 USA
46.Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden
47.Univ Space Res Assoc NSSTC, Huntsville, AL 35805 USA
48.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
49.Ist Nazl Fis Nucl, Sez Roma, I-00133 Rome, Italy
50.Tokyo Inst Technol, Dept Phys, Meguro, Tokyo 1528551, Japan
51.Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA
52.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan
53.Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Higashihiroshima, Hiroshima 7398526, Japan
54.Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA
55.Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria
56.Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria
57.Univ Bordeaux 1, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France
58.Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
59.Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA
60.Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
61.Univ Washington, Dept Phys, Seattle, WA 98195 USA
62.NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA
63.NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA
64.Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA
65.ICREA, Barcelona, Spain
66.CIFS, I-10133 Turin, Italy
67.INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland
68.Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy
69.Joint Ctr Particle Nucl Phys & Cosmol J CPNPC, Nanjing 210093, Peoples R China
70.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
71.Aoyama Gakuin Univ, Dept Math & Phys, Kanagawa 2525258, Japan
72.Univ Kalmar, Sch Pure & Appl Nat Sci, SE-39182 Kalmar, Sweden
73.KA Wallenberg Fdn, Stockholm, Sweden
74.IDAPP, Knoxville, TN 37930 USA
75.NASA, Postdoctoral Program, Washington, DC USA
Recommended Citation
GB/T 7714
Ackermann, M.,Ajello, M.,Asano, K.,et al. DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A[J]. ASTROPHYSICAL JOURNAL,2011,729(2):114(12pp).
APA Ackermann, M..,Ajello, M..,Asano, K..,Axelsson, M..,Baldini, L..,...&Ziegler, M..(2011).DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A.ASTROPHYSICAL JOURNAL,729(2),114(12pp).
MLA Ackermann, M.,et al."DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A".ASTROPHYSICAL JOURNAL 729.2(2011):114(12pp).
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