Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB 100728A

A. A. Abdo, M. Ackermann, M. Ajello, L. Baldini, J. Ballet, G. Barbiellini, M. G. Baring, D. Bastieri, K. Bechtol, R. Bellazzini, B. Berenji, P. N. Bhat, E. Bissaldi, R. D. Blandford, E. Bonamente, J. Bonnell, A. W. Borgland, A. Bouvier, J. Bregeon, M. BrigidaP. Bruel, R. Buehler, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, J. M. Casandjian, C. Cecchi, E. Charles, A. Chekhtman, J. Chiang, S. Ciprini, R. Claus, V. Connaughton, J. Conrad, S. Cutini, A. De Angelis, F. De Palma, C. D. Dermer, E. Do Couto E Silva, P. S. Drell, R. Dubois, C. Favuzzi, Y. Fukazawa, P. Fusco, F. Gargano, N. Gehrels, S. Germani, N. Giglietto, P. Giommi, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, J. Granot, I. A. Grenier, S. Guiriec, D. Hadasch, Y. Hanabata, R. E. Hughes, G. Jóhannesson, A. S. Johnson, T. Kamae, H. Katagiri, J. Kataoka, M. Kerr, J. Knödlseder, M. Kuss, J. Lande, L. Latronico, S. H. Lee, F. Longo, F. Loparco, B. Lott, P. Lubrano, M. N. Mazziotta, J. E. McEnery, P. Mészros, P. F. Michelson, T. Mizuno, A. A. Moiseev, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, T. Nakamori, M. Naumann-Godo, P. L. Nolan, J. P. Norris, E. Nuss, T. Ohsugi, A. Okumura, N. Omodei, E. Orlando, W. S. Paciesas, V. Pelassa, M. Pesce-Rollins, M. Pierbattista, F. Piron, T. A. Porter, J. L. Racusin, S. Rainò, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, L. C. Reyes, M. Roth, H. F.W. Sadrozinski, C. Sgrò, E. J. Siskind, P. D. Smith, E. Sonbas, G. Spandre, P. Spinelli, M. Stamatikos, M. S. Strickman, H. Takahashi, T. Tanaka, Y. Tanaka, J. G. Thayer, J. B. Thayer, D. F. Torres, G. Tosti, E. Troja, T. Uehara, T. L. Usher, J. Vandenbroucke, V. Vasileiou, G. Vianello, N. Vilchez, V. Vitale, A. Von Kienlin, A. P. Waite, P. Wang, B. L. Winer, K. S. Wood, R. Yamazaki, Z. Yang, M. Ziegler, L. Piro

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We present the simultaneous Swift and Fermi observations of the bright GRB 100728A and its afterglow. The early X-ray emission is dominated by a vigorous flaring activity continuing until 1ks after the burst. In the same time interval, high-energy emission is significantly detected by the Fermi/Large Area Telescope. Marginal evidence ofGeV emission is observed up to later times. We discuss the broadband properties of this burst within both the internal and external shock scenarios, with a particular emphasis on the relation between X-ray flares, theGeV emission, and a continued long-duration central engine activity as their power source.

Original languageEnglish
Article numberL27
JournalAstrophysical Journal Letters
Volume734
Issue number2 PART 2
DOIs
Publication statusPublished - 2011 Jun 20

Keywords

  • gamma-ray burst: individual (GRB100728A)
  • radiation mechanisms: non-thermal

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB 100728A'. Together they form a unique fingerprint.

  • Cite this

    Abdo, A. A., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bhat, P. N., Bissaldi, E., Blandford, R. D., Bonamente, E., Bonnell, J., Borgland, A. W., Bouvier, A., Bregeon, J., ... Piro, L. (2011). Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB 100728A. Astrophysical Journal Letters, 734(2 PART 2), [L27]. https://doi.org/10.1088/2041-8205/734/2/L27