Swift and Suzaku observations of the X-ray afterglow from the GRB 060105

被引：0

作者：

Tashiro, Makoto S. ^{[1
]}

Abe, Keiichi ^{[1
]}

Angelini, Lorella ^{[2
]}

Barthelmy, Scott ^{[2
]}

Gehrels, Neil ^{[2
]}

Ishikawa, Nobuyuki ^{[3
]}

Kaluzienski, Louis J. ^{[2
]}

Kawai, Nobuyuki ^{[4
]}

Kelley, Richard L. ^{[2
]}

Kinugasa, Kenzo ^{[5
]}

Kodaira, Hironobu ^{[6
]}

Kohmura, Takayoshi ^{[7
]}

Kubota, Kaori ^{[8
]}

Maeda, Yoshitomo ^{[9
]}

Maeno, Shouta ^{[10
]}

Murakami, Hiroshi ^{[9
]}

Murakami, Toshio ^{[6
]}

Nakagawa, Yujin E. ^{[3
]}

Nakazawa, Kazuhiro ^{[9
]}

Nousek, John ^{[11
]}

Okuno, Shin'ya ^{[6
]}

Onda, Kaori ^{[1
]}

Reeves, James N. ^{[2
]}

Ricker, George ^{[12
]}

Sato, Goro ^{[2
,9
]}

Sonoda, Eri ^{[10
]}

Suzuki, Motoko ^{[13
]}

Takahashi, Tadayuki ^{[9
]}

Tamagawa, Toni ^{[13
]}

Torii, Ken'ichi ^{[14
]}

Ueda, Yoshihiro ^{[8
]}

Urata, Yuji ^{[1
]}

Yamaoka, Kazutaka ^{[3
]}

Yamauchi, Makoto ^{[10
]}

Yonetoku, Daisuke ^{[6
]}

Yoshida, Atsumasa ^{[3
]}

Yoshinari, Satoru ^{[6
]}

机构：

[1] Department of Physics, Saitama University, Sakura

[2] NASA/Goddard Space Flight Center, Greenbelt

[3] Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara

[4] Department of Physics, Tokyo Institute of Technology, Ohokayama, Meguro-ku

[5] Gunma Astronomical Observatory, Takayama

[6] Department of Physics, Kanazawa University, Kanazawa

[7] Physics Department, Kogakuin University, Hachioji

[8] Department of Astronomy, Kyoto University, Sakyo-ku

[9] JAXA, Institute of Space and Astronautical Science, Sagamihara

[10] Faculty of Engineering, University of Miyazaki, Miyazaki

[11] Department of Astronomy and Astrophysics, Pennsylvania State University, University Park

[12] Center for Space Research, Massachusetts Institute of Technology, CSR, Cambridge

[13] RIKEN, Wako

[14] Department of Earth and Space Science, Osaka Univsersity, Toyonaka

来源：

Publications of the Astronomical Society of Japan | 2007年 / 59卷 / 1 SPEC. ISS.期

关键词：

Gamma rays: burst; Radiation mechanisms: non-thermal; Relativistic jet; X-rays: individual (GRB 060105); X-rays: stars acceleration of particles;

D O I：

10.1093/pasj/59.sp1.s361

中图分类号：

学科分类号：

摘要：

Results are presented of early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The bright, long gamma-ray burst GRB 060105 triggered the Swift Burst Alert Telescope at 06:49:28 on 2006 January 5 (T0). The Suzaku team commenced a pre-planned target of opportunity observation at 19 ks (5.3 hr) after the Swift trigger. The X-ray flux faded during observations from 6.8 × 10-9 erg s-1 cm-2 (at T0 + 87 s with the Swift/XRT) to 1.5 × 10-13 erg s-1 cm-2 [at T0 + 94-101 ks with the Suzaku X-ray Imaging Spectrometer (XIS)] in the 2-10 keV energy band. Following prompt emission and successive very steep decay, a shallow decay was observed from T0 + 187 s to T0 + 1287 s. After an observation gap during T0 + (1.5-3) ks, an extremely early steep decay was observed in T0 + (4-30) ks. The lightcurve flattened again at T0 + 30ks, and another steep decay followed from T0 + 50ks to the end of observations. Both steep decays exhibited decay indices of 2.3-2.4. This very early break, if it is a jet break, is the earliest case among X-ray afterglow observations, suggesting a very narrow jet whose opening angle is well below 1°. The unique Suzaku/XIS data allow us to set very tight upper limits on line emission or absorption in this GRB. For the reported pseudo-redshift of z = 4.0 ± 1.3 the upper limit on the iron line equivalent width is 50 eV. © 2007. Astronomical Society of Japan.

引用

页码：S361 / S367

页数：6

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