Global characteristics of X-ray flashes and X-ray-rich gamma-ray bursts observed by HETE-2

被引：220

作者：

Sakamoto, T

Lamb, DQ

Kawai, N

Yoshida, A

Graziani, C

Fenimore, EE

Donaghy, TQ

Matsuoka, M

Suzuki, M

Ricker, G

Atteia, JL

Shirasaki, Y

Tamagawa, T

Torii, K

Galassi, M

Doty, J

Vanderspek, R

Crew, GB

Villasenor, J

Butler, N

Prigozhin, G

Jernigan, JG

Barraud, C

Boer, M

Dezalay, JP

Olive, JF

Hurley, K

Levine, A

Monnelly, G

Martel, F

Morgan, E

Woosley, SE

Cline, T

Braga, J

Manchanda, R

Pizzichini, G

Takagishi, K

Yamauchi, M

机构：

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

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

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

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

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

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

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

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

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

[10] Natl Astron Observ, Tokyo 1818588, Japan

[11] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Osaka 5600043, Japan

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

[13] UPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France

[14] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[15] Inst Nacl Pesquisas Espaciais, BR-12227010 Sao Jose Dos Campos, Brazil

[16] Tata Inst Fundamental Res, Dept Astron & Astrophys, Bombay 400005, Maharashtra, India

[17] INAF IASF, Sez Bologna, I-40129 Bologna, Italy

[18] Miyazaki Univ, Fac Engn, Miyazaki 8892192, Japan

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 629卷 / 01期

关键词：

gamma rays : bursts;

D O I：

10.1086/431235

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first 3 years of its mission, focusing on the properties of X- ray flashes (XRFs) and X- ray - rich GRBs (XRRs). We find that the numbers of XRFs, XRRs, and GRBs are comparable, and that the durations and the sky distributions of XRFs and XRRs are similar to those of GRBs. We also find that the spectral properties of XRFs and XRRs are similar to those of GRBs, except that the values of the peak energy E-peak(obs) of the burst spectrum in nu F-nu, the peak energy flux F-peak, and the energy fluence S-E of XRFs are much smaller ( and those of XRRs are smaller) than those of GRBs. Finally, we find that the distributions of all three kinds of bursts form a continuum in the [S-E(2 - 30 keV), S-E(30 - 400) keV] plane, the [S-E( 2 - 400 keV), E-peak] plane, and the [F-peak(50 - 300 keV), E-peak] plane. These results provide strong evidence that all three kinds of bursts arise from the same phenomenon.

引用

页码：311 / 327

页数：17

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