Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A

Author:

Ackermann M.1,Ajello M.2,Asano K.3,Atwood W. B.4,Axelsson M.567,Baldini L.8,Ballet J.9,Barbiellini G.1011,Baring M. G.12,Bastieri D.1314,Bechtol K.15,Bellazzini R.16,Bissaldi E.17,Bonamente E.1819,Bregeon J.16,Brigida M.2021,Bruel P.22,Buehler R.1,Burgess J. Michael23,Buson S.1314,Caliandro G. A.24,Cameron R. A.15,Caraveo P. A.25,Cecchi C.1819,Chaplin V.23,Charles E.15,Chekhtman A.26,Cheung C. C.27,Chiang J.15,Chiaro G.14,Ciprini S.2829,Claus R.15,Cleveland W.30,Cohen-Tanugi J.31,Collazzi A.32,Cominsky L. R.33,Connaughton V.23,Conrad J.6343536,Cutini S.2829,D’Ammando F.37,de Angelis A.38,DeKlotz M.39,de Palma F.2021,Dermer C. D.27,Desiante R.10,Diekmann A.40,Di Venere L.15,Drell P. S.15,Drlica-Wagner A.15,Favuzzi C.2021,Fegan S. J.22,Ferrara E. C.41,Finke J.27,Fitzpatrick G.42,Focke W. B.15,Franckowiak A.15,Fukazawa Y.43,Funk S.15,Fusco P.2021,Gargano F.21,Gehrels N.41,Germani S.1819,Gibby M.40,Giglietto N.2021,Giles M.40,Giordano F.2021,Giroletti M.37,Godfrey G.15,Granot J.44,Grenier I. A.9,Grove J. E.27,Gruber D.45,Guiriec S.3241,Hadasch D.24,Hanabata Y.43,Harding A. K.41,Hayashida M.1546,Hays E.41,Horan D.22,Hughes R. E.47,Inoue Y.15,Jogler T.15,Jóhannesson G.48,Johnson W. N.27,Kawano T.43,Knödlseder J.4950,Kocevski D.15,Kuss M.16,Lande J.15,Larsson S.5634,Latronico L.51,Longo F.1011,Loparco F.2021,Lovellette M. N.27,Lubrano P.1819,Mayer M.1,Mazziotta M. N.21,McEnery J. E.4152,Michelson P. F.15,Mizuno T.53,Moiseev A. A.5254,Monzani M. E.15,Moretti E.67,Morselli A.55,Moskalenko I. V.15,Murgia S.15,Nemmen R.41,Nuss E.31,Ohno M.43,Ohsugi T.53,Okumura A.1556,Omodei N.15,Orienti M.37,Paneque D.1557,Pelassa V.23,Perkins J. S.415458,Pesce-Rollins M.16,Petrosian V.15,Piron F.31,Pivato G.14,Porter T. A.15,Racusin J. L.41,Rainò S.2021,Rando R.1314,Razzano M.416,Razzaque S.59,Reimer A.1560,Reimer O.1560,Ritz S.4,Roth M.61,Ryde F.67,Sartori A.25,Parkinson P. M. Saz4,Scargle J. D.62,Schulz A.1,Sgrò C.16,Siskind E. J.63,Sonbas E.304164,Spandre G.16,Spinelli P.2021,Tajima H.1556,Takahashi H.43,Thayer J. G.15,Thayer J. B.15,Thompson D. J.41,Tibaldo L.15,Tinivella M.16,Torres D. F.2465,Tosti G.1819,Troja E.4152,Usher T. L.15,Vandenbroucke J.15,Vasileiou V.31,Vianello G.1566,Vitale V.5567,Winer B. L.47,Wood K. S.27,Yamazaki R.68,Younes G.3069,Yu H.-F.45,Zhu S. J.52,Bhat P. N.23,Briggs M. S.23,Byrne D.42,Foley S.4245,Goldstein A.23,Jenke P.23,Kippen R. M.70,Kouveliotou C.69,McBreen S.4245,Meegan C.23,Paciesas W. S.30,Preece R.23,Rau A.45,Tierney D.42,van der Horst A. J.71,von Kienlin A.45,Wilson-Hodge C.69,Xiong S.23,Cusumano G.72,La Parola V.72,Cummings J. R.4173

Affiliation:

1. Deutsches Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.

2. Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA.

3. Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa City, Chiba 277-8582, Japan.

4. Santa Cruz Institute for Particle Physics, Department of Physics, and Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA.

5. Department of Astronomy, Stockholm University, SE-106 91 Stockholm, Sweden.

6. Oskar Klein Centre for Cosmoparticle Physics, AlbaNova, SE-106 91 Stockholm, Sweden.

7. Department of Physics, Royal Institute of Technology (KTH), AlbaNova, SE-106 91 Stockholm, Sweden.

8. Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa I-56127 Pisa, Italy.

9. Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Service d’Astrophysique, CEA Saclay, 91191 Gif sur Yvette, France.

10. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste, Italy.

11. Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy.

12. Department of Physics and Astronomy, Rice University, Houston, TX 77251, USA.

13. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy.

14. Dipartimento di Fisica e Astronomia “G. Galilei,” Università di Padova, I-35131 Padova, Italy.

15. W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305, USA.

16. Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy.

17. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, and Università di Trieste, I-34127 Trieste, Italy.

18. Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia, Italy.

19. Dipartimento di Fisica, Università degli Studi di Perugia, I-06123 Perugia, Italy.

20. Dipartimento di Fisica “M. Merlin” dell’Università e del Politecnico di Bari, I-70126 Bari, Italy.

21. Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70126 Bari, Italy.

22. Laboratoire Leprince-Ringuet, École Polytechnique, CNRS/IN2P3, Palaiseau, France.

23. Center for Space Plasma and Aeronomic Research, University of Alabama, Huntsville, AL 35899, USA.

24. Institut de Ciències de l’Espai (IEEE-CSIC), Campus UAB, 08193 Barcelona, Spain.

25. INAF–Istituto di Astrofisica Spaziale e Fisica Cosmica, I-20133 Milano, Italy.

26. Center for Earth Observing and Space Research, College of Science, George Mason University, Fairfax, VA 22030, USA; resident at Naval Research Laboratory, Washington, DC 20375, USA.

27. Space Science Division, Naval Research Laboratory, Washington, DC 20375, USA.

28. Agenzia Spaziale Italiana Science Data Center, I-00044 Frascati (Roma), Italy.

29. Istituto Nazionale di Astrofisica–Osservatorio Astronomico di Roma, I-00040 Monte Porzio Catone (Roma), Italy.

30. Universities Space Research Association, Columbia, MD 21044, USA.

31. Laboratoire Univers et Particules de Montpellier, Université Montpellier 2, CNRS/IN2P3, Montpellier, France.

32. NASA Postdoctoral Program Fellow, USA.

33. Department of Physics and Astronomy, Sonoma State University, Rohnert Park, CA 94928, USA.

34. Department of Physics, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden.

35. Royal Swedish Academy of Sciences Research Fellow, funded by a grant from the K. A. Wallenberg Foundation.

36. Royal Swedish Academy of Sciences, Box 50005, SE-104 05 Stockholm, Sweden.

37. INAF Istituto di Radioastronomia, 40129 Bologna, Italy.

38. Dipartimento di Fisica, Università di Udine, and Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Gruppo Collegato di Udine, I-33100 Udine, Italy.

39. Stellar Solutions Inc., 250 Cambridge Avenue, Suite 204, Palo Alto, CA 94306, USA.

40. Jacobs Technology, Huntsville, AL 35806, USA.

41. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

42. University College Dublin, Belfield, Dublin 4, Ireland.

43. Department of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan.

44. Department of Natural Sciences, Open University of Israel, Ra’anana 43537, Israel.

45. Max-Planck-Institut für Extraterrestrische Physik, 85748 Garching, Germany.

46. Department of Astronomy, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.

47. Department of Physics, Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA.

48. Science Institute, University of Iceland, IS-107 Reykjavik, Iceland.

49. CNRS, IRAP, F-31028 Toulouse Cedex 4, France.

50. GAHEC, Université de Toulouse, UPS-OMP, IRAP, Toulouse, France.

51. Istituto Nazionale di Fisica Nucleare, Sezione di Torino, I-10125 Torino, Italy.

52. Department of Physics and Department of Astronomy, University of Maryland, College Park, MD 20742, USA.

53. Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan.

54. Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

55. Istituto Nazionale di Fisica Nucleare, Sezione di Roma “Tor Vergata,” I-00133 Roma, Italy.

56. Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan.

57. Max-Planck-Institut für Physik, D-80805 München, Germany.

58. Department of Physics and Center for Space Sciences and Technology, University of Maryland Baltimore County, Baltimore, MD 21250, USA.

59. Department of Physics, University of Johannesburg, Auckland Park 2006, South Africa.

60. Institut für Astro- und Teilchenphysik and Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria.

61. Department of Physics, University of Washington, Seattle, WA 98195, USA.

62. Space Sciences Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.

63. NYCB Real-Time Computing Inc., Lattingtown, NY 11560, USA.

64. Adyaman University, 02040 Adyaman, Turkey.

65. Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain.

66. Consorzio Interuniversitario per la Fisica Spaziale (CIFS), I-10133 Torino, Italy.

67. Dipartimento di Fisica, Università di Roma “Tor Vergata,” I-00133 Roma, Italy.

68. Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan.

69. NASA Marshall Space Flight Center, Huntsville, AL 35812, USA.

70. Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

71. Astronomical Institute Änton Pannekoek, University of Amsterdam, 1090 GE Amsterdam, Netherlands.

72. INAF–Istituto di Astrofisica Spaziale e Fisica Cosmica, Via U. La Malfa 153, I-90146 Palermo, Italy.

73. Center for Research and Exploration in Space Science & Technology, University of Maryland, Baltimore County, Baltimore, MD 21250, USA.

Abstract

Bright Lights Gamma-ray bursts (GRBs), bright flashes of gamma-ray light, are thought to be associated with the collapse of massive stars. GRB 130427A was detected on 27 April 2013, and it had the longest gamma-ray duration and one of the largest isotropic energy releases observed to date (see the Perspective by Fynbo ). Ackermann et al. (p. 42 , published online 21 November) report data obtained with the Fermi Gamma-Ray Space Telescope, which reveal a high-energy spectral component that cannot be accounted for by the standard external shock synchrotron radiation model. Vestrand et al. (p. 38 , published online 21 November) report the detection of an extremely bright flash of visible light and unexpected similarities between the variations of optical light and the highest-energy gamma rays that indicate a common origin. A detailed analysis of the first pulse of GRB 130427A by Preece et al. (p. 51 , published online 21 November) suggests that existing models cannot explain all the observed spectral and temporal behaviors simultaneously. Maselli et al. (p. 48 , published online 21 November) present x-ray and optical light curves of the burst's prompt emission as well as of its afterglow as recorded by the Swift satellite and a range of ground-based telescopes.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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