Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE

被引：115

作者：

Barraud, C ^{[1
]}

Olive, JF

Lestrade, JP

Atteia, JL

Hurley, K

Ricker, G

Lamb, DQ

Kawai, N

Boer, M

Dezalay, JP

Pizzichini, G

Vanderspek, R

Crew, G

Doty, J

Monnelly, G

Villasenor, J

Butler, N

Levine, A

Yoshida, A

Shirasaki, Y

Sakamoto, T

Tamagawa, T

Torii, K

Matsuoka, M

Fenimore, EE

Galassi, A

Tavenner, T

Donaghy, TQ

Graziani, C

Jernigan, JG

机构：

[1] Observ Midi Pyrenees, Astrophys Lab, F-31400 Toulouse, France

[2] Observ Midi Pyrenees, CESR, F-31028 Toulouse, France

[3] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[4] MIT, Ctr Space Res, Cambridge, MA 02139 USA

[5] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[6] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[7] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[8] Aoyama Gakuin Univ, Dept Phys, Setagaya Ku, Tokyo 1578572, Japan

[9] Natl Space Dev Agcy Japan, Tsukuba Space Ctr, Tsukuba, Ibaraki 3058505, Japan

[10] Natl Astron Observ, Tokyo 1818588, Japan

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

[12] CNR, IASF, I-40129 Bologna, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 400卷 / 03期

关键词：

gamma-rays; bursts;

D O I：

10.1051/0004-6361:20030074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with the Wide Field X-ray Monitor onboard HETE-2 or with the GRB Interplanetary Network. We derive the spectral parameters of the time-integrated spectra, and present the distribution of the low-energy photon index, alpha, and of the peak energy, E-p. We then discuss the existence and nature of the recently discovered X-Ray Flashes and their relationship with classical GRBs.

引用

页码：1021 / 1030

页数：10

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