DETAILED CLASSIFICATION OF SWIFT'S GAMMA-RAY BURSTS

被引：75
作者：
Horvath, I. [1 ]
Bagoly, Z. [2 ]
Balazs, L. G. [3 ]
de Ugarte Postigo, A. [4 ,5 ]
Veres, P. [1 ,2 ]
Meszaros, A. [6 ]
机构：
[1] Bolyai Mil Univ, Dept Phys, H-1581 Budapest, Hungary
[2] Eotvos Lorand Univ, Dept Phys Complex Syst, H-1117 Budapest, Hungary
[3] Konkoly Observ Budapest, H-1505 Budapest, Hungary
[4] European So Observ, Santiago 19, Chile
[5] INAF OAB, I-23807 Merate, LC, Italy
[6] Charles Univ Prague, Fac Math & Phys, Astron Inst, CR-18000 Prague 8, Czech Republic
来源：
ASTROPHYSICAL JOURNAL | 2010年 / 713卷 / 01期
关键词：
gamma rays: general; methods: statistical; RHESSI SATELLITE; SKY-DISTRIBUTION; CATALOG; BATSE; ANISOTROPY; REDSHIFTS; AFTERGLOW; BEPPOSAX; GALAXY;
D O I：
10.1088/0004-637X/713/1/552
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Earlier classification analyses found three types of gamma-ray bursts (short, long, and intermediate in duration) in the BATSE sample. Recent works have shown that these three groups are also present in the RHESSI and BeppoSAX databases. The duration distribution analysis of the bursts observed by the Swift satellite also favors the three-component model. In this paper, we extend the analysis of the Swift data with spectral information. We show, using the spectral hardness and duration simultaneously, that the maximum likelihood method favors the three-component against the two-component model. The likelihood also shows that a fourth component is not needed.
引用
收藏
页码：552 / 557
页数：6
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