The Suzaku-Swift joint observation of the early X-ray afterglow of GRB060105

Makoto S. Tashiro, Keiichi Abe, Lorella Angelini, Scott Barthelmy, Neil Gehrels, Nobuyuki Ishikawa, Louis J. Kaluzienski, Nobuyuki Kawai, Richard L. Kelley, Kenzo Kinugasa, Hironobu Kodaira, Takayoshi Kohmura, Kaori Kubota, Yoshitomo Maeda, Shouta Maeno, Hiroshi Murakami, Toshio Murakami, Yujin E. Nakagawa, Kazuhiro Nakazawa, John NousekShin'ya Okuno, Kaori Onda, James N. Reeves, George Ricker, Goro Sato, Eri Sonoda, Motoko Suzuki, Tadayuki Takahashi, Toru Tamagawa, KeN'Ichi Torii, Yoshihiro Ueda, Yuji Urata, Kazutaka Yamaoka, Makoto Yamauchi, Daisuke Yonetoku, Atsumasa Yoshida, Satoru Yoshinari

研究成果: Article

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Results are presented of a Suzaku and Swift joint observation for an early X-ray afterglow of GRB 060105. The bright, long gamma-ray burst GRB 060105 triggered the Swift Burst Alert Telescope (BAT) at 06:49:28 on 5 January 2006 (T0). The Suzaku team commenced a pre-planned target of opportunity observation at 12:10 and continued till 12:00 on January 6. The X-ray flux faded during the observations from 6.8 × 10-9 erg s _1cm-2 to 1.5 × 10-13 erg s _1cm-2 in the 2-10 keV energy band. Following the 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 steep decay 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°.

元の言語English
ページ(範囲)3-6
ページ数4
ジャーナルProgress of Theoretical Physics Supplement
発行部数169
出版物ステータスPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Tashiro, M. S., Abe, K., Angelini, L., Barthelmy, S., Gehrels, N., Ishikawa, N., Kaluzienski, L. J., Kawai, N., Kelley, R. L., Kinugasa, K., Kodaira, H., Kohmura, T., Kubota, K., Maeda, Y., Maeno, S., Murakami, H., Murakami, T., Nakagawa, Y. E., Nakazawa, K., ... Yoshinari, S. (2007). The Suzaku-Swift joint observation of the early X-ray afterglow of GRB060105. Progress of Theoretical Physics Supplement, (169), 3-6.