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arXiv 1111.3625astro-ph.HEastro-ph.CO
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五个伽马射线暴(GRB 100901 A,100902 A,100905 A,100906 A和101020 A)的瞬发、早期和余辉光学观测

Prompt, early, and afterglow optical observations of five gamma-ray bursts (GRBs 100901A, 100902A, 100905A, 100906A, and 101020A)

E. S. Gorbovskoy, G. V. Lipunova, V. M. Lipunov, V. G. Kornilov, A. A. Belinski, N. I. Shatskiy, N. V. Tyurina, D. A. Kuvshinov, P. V. Balanutsa, V. V. Chazov, … 展开作者

E. S. Gorbovskoy, G. V. Lipunova, V. M. Lipunov, V. G. Kornilov, A. A. Belinski, N. I. Shatskiy, N. V. Tyurina, D. A. Kuvshinov, P. V. Balanutsa, V. V. Chazov, A. Kuznetsov, D. S. Zimnukhov, M. V. Kornilov, A. V. Sankovich, A. Krylov, K. I. Ivanov, O. Chvalaev, V. A. Poleschuk, E. N. Konstantinov, O. A. Gress, S. A. Yazev, N. M. Budnev, V. V. Krushinski, I. S. Zalozhnich, A. A. Popov, A. G. Tlatov, A. V. Parhomenko, D. V. Dormidontov, V. Sennik, V. V. Yurkov, Yu. P. Sergienko, D. Varda, I. P. Kudelina, A. J. Castro-Tirado, J. Gorosabel, R. Sánchez--Ramírez, M. Jelinek, J. C. Tello

摘要:

本文介绍了利用俄罗斯望远镜-机器人移动天文系统(MASTER-II net)、内华达-塞拉天文台1.5米望远镜和2.56米北欧光学望远镜对5个伽马射线暴(GRB 100901 A、100902 A、100905 A、100906 A和101020 A)进行的瞬发、早期和余辉光学观测的结果。对于两个源,GRB 100901 A和GRB 100906 A,我们检测到的光学对应物,并获得光变曲线开始前停止的γ射线发射,在113秒和48秒后触发,分别。GRB 100906 A的观测是用两个偏振滤光片进行的。其他三个爆发的观测给出了光通量的上限,并简要讨论了它们的性质。对GRB 100901 A和GRB 100906 A的更详细的分析,加上雨燕数据的补充,提供了以下结果,并指出了两个爆发中瞬发光辐射的不同来源。光变曲线和光谱分布表明,GRB 100901 A的瞬发光和高能辐射的共同产生场所。GRB 100901 A的光谱拟合结果在从光学到X射线的范围内有利于幂律能量分布,在宿主星系中具有相似的光学消光值。GRB 100906 A产生了一个平滑的峰值光变曲线,这表明在这个GRB的即时光辐射起源于前冲击。这是支持的频谱分析。我们发现伽玛暴100906 A满足Amati和Ghirlanda关系。给出了GRB 100906 A主源消光系数的上限值。

英文摘要:

We present results of the prompt, early, and afterglow optical observations of five gamma-ray bursts, GRBs 100901A, 100902A, 100905A, 100906A, and 101020A, made with the Mobile Astronomical System of TElescope-Robots in Russia (MASTER-II net), the 1.5-m telescope of Sierra-Nevada Observatory, and the 2.56-m Nordic Optical Telescope. For two sources, GRB 100901A and GRB 100906A, we detected optical counterparts and obtained light curves starting before cessation of gamma-ray emission, at 113 s and 48 s after the trigger, respectively. Observations of GRB 100906A were conducted with two polarizing filters. Observations of the other three bursts gave the upper limits on the optical flux; their properties are briefly discussed. More detailed analysis of GRB 100901A and GRB 100906A supplemented by Swift data provides the following results and indicates different origins of the prompt optical radiation in the two bursts. The light curves patterns and spectral distributions suggest a common production site of the prompt optical and high-energy emission in GRB 100901A. Results of spectral fits for GRB 100901A in the range from the optical to X-rays favor power-law energy distributions with similar values of the optical extinction in the host galaxy. GRB 100906A produced a smoothly peaking optical light curve suggesting that the prompt optical radiation in this GRB originated in a front shock. This is supported by a spectral analysis. We have found that the Amati and Ghirlanda relations are satisfied for GRB 100906A. An upper limit on the value of the optical extinction on the host of GRB 100906A is obtained.

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