GRB 040403:: A faint X-ray rich gamma-ray burst discovered by INTEGRAL

被引：8
|
作者：
Mereghetti, S
Götz, D
Andersen, MI
Castro-Tirado, A
Frontera, F
Gorosabel, J
Hartmann, DH
Hjorth, J
Hudec, R
Hurley, K
Pizzichini, G
Produit, N
Tarana, A
Topinka, M
Ubertini, P
de Ugarte, A
机构：
[1] CNR, Sez Milano G Occhialini, Ist Astrofis Spaziale & Fis Cosmica, I-20133 Milan, Italy
[2] Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy
[3] Astrophys Inst Potsdam, D-14482 Potsdam, Germany
[4] Inst Astrofis Andalucia, CSIC, Granada 18080, Spain
[5] Univ Ferrara, Dept Phys, I-44100 Ferrara, Italy
[6] CNR, Sez Bologna, Ist Astrofis Spaziale & Fis Cosmica, I-40129 Bologna, Italy
[7] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA
[8] Univ Copenhagen, Niels Bohr Inst, Astron Observ, DK-2100 Copenhagen, Denmark
[9] Acad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech Republic
[10] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
[11] Integral Sci Data Ctr, CH-1290 Versoix, Switzerland
[12] CNR, Sez Roma, Ist Astrofis Spaziale & Fis Cosmica, I-00133 Rome, Italy
来源：
ASTRONOMY & ASTROPHYSICS | 2005年 / 433卷 / 01期
关键词：
gamma rays : bursts; gamma rays : observations;
D O I：
10.1051/0004-6361:20042030
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
GRB 040403 is one of the faintest gamma-ray bursts for which a rapid and accurate localization has been obtained. Here we report on the gamma-ray properties of this burst, based on observations with the IBIS instrument aboard INTEGRAL, and the results of searches for its optical afterglow. The steep spectrum ( power law photon index = 1.9 in the 20 - 200 keV range) implies that GRB 040403 is most likely an X-ray rich burst. Our optical limit of R > 24.2 at 16.5 h after the burst, indicates a rather faint afterglow, similar to those seen in other relatively soft and faint bursts.
引用
收藏
页码：113 / 116
页数：4
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