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arXiv 0710.4590astro-ph
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GRB 070125瞬发Gamma-Ray辐射的观测

Observations of the Prompt Gamma-Ray Emission of GRB 070125

Eric C. Bellm, Kevin Hurley, Valentin Pal'shin, Kazutaka Yamaoka, Mark S. Bandstra, Steven E. Boggs, Soojing Hong, Natsuki Kodaka, A. S. Kozyrev, M. L. Litvak, … 展开作者

Eric C. Bellm, Kevin Hurley, Valentin Pal'shin, Kazutaka Yamaoka, Mark S. Bandstra, Steven E. Boggs, Soojing Hong, Natsuki Kodaka, A. S. Kozyrev, M. L. Litvak, I. G. Mitrofanov, Yujin E. Nakagawa, Masanori Ohno, Kaori Onda, A. B. Sanin, Satoshi Sugita, Makoto Tashiro, V. I. Tretyakov, Yuji Urata, Claudia Wigger

摘要:

这个长而明亮的伽马射线暴GRB 070125被行星际网络定位。我们提出了由Konus-WIND,RHESSI,Suzaku-WAM和\textit{Swift} -BAT观测到的瞬发γ射线发射的光变曲线。我们详细的联合频谱与Konus和RHESSI数据拟合的结果。在大约一分钟的时间内,爆发的多峰发射显示出适度的从硬到软的演变。Konus观测到的总爆发通量为$1.79 \times 10^{-4}$ erg/cm $^2$(20 keV-10 MeV)。利用光谱红移$z=1.548$,我们发现爆发是符合“阿马蒂”$E_{peak,i}-E_{iso}$相关。假设从爆发余辉的宽带模型中得出的射流张开角,GRB 070125是"Ghirlanda“$E_{peak,i}-E_γ$相关性的一个显著异常值。它的准直校正能量释放$E_γ= 2.5 \times 10^{52}$尔格是迄今为止观测到的最大的。

英文摘要:

The long, bright gamma-ray burst GRB 070125 was localized by the Interplanetary Network. We present light curves of the prompt gamma-ray emission as observed by Konus-WIND, RHESSI, Suzaku-WAM, and \textit{Swift}-BAT. We detail the results of joint spectral fits with Konus and RHESSI data. The burst shows moderate hard-to-soft evolution in its multi-peaked emission over a period of about one minute. The total burst fluence as observed by Konus is $1.79 \times 10^{-4}$ erg/cm$^2$ (20 keV--10 MeV). Using the spectroscopic redshift $z=1.548$, we find that the burst is consistent with the ``Amati'' $E_{peak,i}-E_{iso}$ correlation. Assuming a jet opening angle derived from broadband modeling of the burst afterglow, GRB 070125 is a significant outlier to the ``Ghirlanda'' $E_{peak,i}-E_γ$ correlation. Its collimation-corrected energy release $E_γ= 2.5 \times 10^{52}$ ergs is the largest yet observed.

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