GRB 051210: Swift detection of a short gamma ray burst

被引：31

作者：

La Parola, V. ^{[1
]}

Mangano, V.

Fox, D.

Zhang, B.

Krimm, H. A.

Cusumano, G.

Mineo, T.

Burrows, D. N.

Barthelmy, S.

Campana, S.

Capalbi, M.

Chincarini, G.

Gehrels, N.

Giommi, P.

Marshall, F. E.

Meszaros, P.

Moretti, A.

O'Brien, P. T.

Palmer, D. M.

Perri, M.

Romano, P.

Tagliaferri, G.

机构：

[1] INAF, Palermo, Italy

[2] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

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

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

[5] Univ Space Res Assoc, Columbia, MD 21044 USA

[6] INAF, Osserv Astron Brera, I-23807 Merate, Italy

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

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

[9] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[10] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[11] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 454卷 / 03期

关键词：

gamma rays : bursts; X-rays : bursts;

D O I：

10.1051/0004-6361:20065083

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. The short/hard GRB 051210 was detected and located by the Swift-BAT instrument and rapidly pointed towards by the narrow field instruments. The XRT was able to observe a bright, rapidly fading X-ray emission. We present the analysis of the prompt and afterglow emission of this event. Methods. The BAT spectrum is a power-law with photon index 1.0 +/- 0.3. The X-ray light curve decays with slope -2.58 +/- 0.11 and shows a small flare in the early phases. The spectrum can be described with a power law with photon index 1.54 +/- 0.16 and absorption (7.5(-3.2)(+4.3)) x 10(20) cm(-2). Results. We find that the X-ray emission is consistent with the hypothesis that we are observing the curvature effect of a GRB that occurred in a low density medium, with no detectable afterglow attributable to an external shock. We estimate the density of the circumburst medium to be lower than 3 x 10(-3) cm(-3). We also discuss different hypothesis on the possible origin of the flare.

引用

页码：753 / 757

页数：5

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