伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期日, 八月 16, 2009

Giuliani, A. 2009 AGILE对GRB 090510的观测

主要内容:


精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)
· arXiv e-print (arXiv:0908.1908)
· References in the Article
·
· Translate This Page
Title:
Agile Detection of Delayed Gamma-Ray Emission from the Short Gamma-Ray Burst GRB 090510
Authors:
Giuliani, A.; Fuschino, F.; Vianello, G.; Marisaldi, M.; Mereghetti, S.; Tavani, M.; Cutini, S.; Barbiellini, G.; Longo, F.; Moretti, E.; Feroci, M.; Del Monte, E.; Argan, A.; Bulgarelli, A.; Caraveo, P.; Cattaneo, P. W.; Chen, A. W.; Contessi, T.; D'Ammando, F.; Costa, E.; De Paris, G.; Di Cocco, G.; Donnarumma, I.; Evangelista, Y.; Ferrari, A.; Fiorini, M.; Galli, M.; Gianotti, F.; Labanti, C.; Lapshov, I.; Lazzarotto, F.; Lipari, P.; Morselli, A.; Pacciani, L.; Pellizzoni, A.; Perotti, F.; Piano, G.; Picozza, P.; Pilia, M.; Pucella, G.; Prest, M.; Rapisarda, M.; Rappoldi, A.; Rubini, A.; Sabatini, S.; Scalise, E.; Striani, E.; Soffitta, P.; Trifoglio, M.; Trois, A.; Vallazza, E.; Vercellone, S.; Vittorini, V.; Zambra, A.; Zanello, D.; Pittori, C.; Verrecchia, F.; Santolamazza, P.; Giommi, P.; Colafrancesco, S.; Antonelli, L. A.; Salotti, L.
Publication:
eprint arXiv:0908.1908
Publication Date:
08/2009
Origin:
ARXIV
Keywords:
Astrophysics - High Energy Astrophysical Phenomena
Comment:
Submitted to the Astrophysical Journal Letters on August 4, 2009
Bibliographic Code:
2009arXiv0908.1908G

Abstract

Short gamma-ray bursts (GRBs), typically lasting less than 2 s, are a special class of GRBs of great interest. We report the detection by the AGILE satellite of the short GRB 090510 which shows two clearly distinct emission phases: a prompt phase lasting ~ 200 msec and a second phase lasting tens of seconds. The burst is relatively intense in the 0.3-10 MeV range showing a spectrum of the prompt phase characterized by a large peak/cutoff energy near 3 MeV. Following the prompt phase, gamma-ray photons above 30 MeV were detected showing a power-law time decay of the flux of the type t^-1.3. The broad-band spectrum of this "delayed gamma-ray emission phase" is remarkably different from that of the prompt phase. It extends from sub-MeV to hundreds of MeV energies with a photon index alpha ~ 1.5. We present the timing and spectral data of GRB 090510 and briefly discuss its remarkable properties within the current models of gamma-ray emission of short GRBs.
Bibtex entry for this abstract Preferred format for this abstract (see Preferences)

没有评论: