The First Pulse of the Extremely Bright GRB 130427A: A Test Lab for Synchrotron Shocks

Gamma-ray burst (GRB) 130427A is one of the most energetic GRBs ever observed. The initial pulse up to 2.5 seconds is possibly the brightest well-isolated pulse observed to date. A fine time resolution spectral analysis shows power-law decays of the peak energy from the onset of the pulse, consisten...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2014-01, Vol.343 (6166), p.51-54
Hauptverfasser:	Preece, R., Burgess, J. Michael, von Kienlin, A., Briggs, M. S., Chaplin, V., Fitzpatrick, G., Foley, S., Gibby, M., Giles, M., Gruber, D., Jenke, P., Kippen, R. M., Kouveliotou, C., Meegan, C., Paciesas, W. S., Pelassa, V., Tierney, D., van der Horst, A. J., Xiong, S., Younes, G., Yu, H.-F., Ajello, M., Baldini, L., Barbiellini, G., Baring, M. G., Bellazzini, R., Bissaldi, E., Bonamente, E., Bregeon, J., Bruel, P., Buson, S., Cameron, R. A., Caraveo, P. A., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., D'Ammando, F., de Angelis, A., de Palma, F., Desiante, R., Digel, S. W., Drell, P. S., Franckowiak, A., Gehrels, N., Germani, S., Giordano, F., Giroletti, M., Godfrey, G., Guiriec, S., Hadasch, D., Hanabata, Y., Harding, A. K., Hayashida, M., Iyyani, S., Jóannesson, G., Kawano, T., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Lovellette, M. N., Lubrano, P., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Nemmen, R., Nuss, E., Ohno, M., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Pivato, G., Rainò, S., Razzaque, S., Reimer, A., Roth, M., Ryde, F., Schulz, A., Sgrò, C., Siskind, E. J., Spandre, G., Thayer, J. G., Tibaldo, L., Tinivella, M., Torres, D. F., Troja, E., Usher, T. L., Vasileiou, V., Vianello, G., Vitale, V., Werner, M., Winer, B. L., Zhu, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical cosmology Astronomy Astrophysics Gamma rays Laboratories Light curves Luminosity Nuclear Experiment Photons Physics Shock waves Space laboratories Space research Spectral index Studies Synchrotrons teoretisk fysik Theoretical Physics
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Beschreibung
Zusammenfassung:	Gamma-ray burst (GRB) 130427A is one of the most energetic GRBs ever observed. The initial pulse up to 2.5 seconds is possibly the brightest well-isolated pulse observed to date. A fine time resolution spectral analysis shows power-law decays of the peak energy from the onset of the pulse, consistent with models of internal synchrotron shock pulses. However, a strongly correlated power-law behavior is observed between the luminosity and the spectral peak energy that is inconsistent with curvature effects arising in the relativistic outflow. It is difficult for any of the existing models to account for all of the observed spectral and temporal behaviors simultaneously.
ISSN:	0036-8075 1095-9203 1095-9203
DOI:	10.1126/science.1242302