The X-ray afterglow of the short gamma ray burst 050724

被引：89

作者：

Campana, S

Tagliaferri, G

Lazzati, D

Chincarini, G

Covino, S

Page, K

Romano, P

Moretti, A

Cusumano, G

Mangano, V

Mineo, T

La Parola, V

Giommi, P

Perri, M

Capalbi, M

Zhang, B

Barthelmy, S

Cummings, J

Sakamoto, T

Burrows, DN

Kennea, JA

Nousek, JA

Osborne, JP

O'Brien, PT

Godet, O

Gehrels, N

机构：

[1] Osserv Astron Brera, I-23807 Merate, LC, Italy

[2] Univ Colorado, JILA, Boulder, CO 80309 USA

[3] Univ Milan, Dipartimento Fis, I-20126 Milan, Italy

[4] Univ Leicester, Dept Phys & Astron, Xray & Observat Astron Grp, Leicester LE1 7RH, Leics, England

[5] Ist Astrofis Spaziale & Fis Cosm Palermo, INAF, I-90146 Palermo, Italy

[6] ASI Sci Data Ctr, I-00044 Frascati, Roma, Italy

[7] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA

[8] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[9] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 454卷 / 01期

关键词：

gamma rays : bursts; X-rays : general;

D O I：

10.1051/0004-6361:20064856

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Short duration (<= 2 s) Gamma-ray bursts (GRBs) have been a mystery since their discovery. Until May 2005 very little was known about short GRBs, but this situation has changed rapidly in the last few months since the Swift and HETE-2 satellites have made it possible to discover X-ray and optical counterparts to these sources. Positional associations indicate that short GRBs arise in close-by galaxies (z < 0.7). Here we report on a detailed study of the short GRB 050724 X-ray afterglow. This burst shows strong flaring variability in the X-ray band. It clearly confirms early suggestions of X-ray activity in the 50-100 s time interval following the GRB onset seen with BATSE. Late flare activity is also observed. These observations support the idea that flares are related to the inner engine for short GRBs, as well as long GRBs.

引用

页码：113 / 117

页数：5

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