Peculiarly narrow SED of GRB090926B with MAXI and Fermi/GBM

Serino M.; Yoshida A.; Kawai N.; Nakagawa Y.E.; Mihara T.; Ueda Y.; Nakahira S.; Eguchi S.; Hiroi K.; Ishikawa M.; Isobe N.; Kimura M.; Kitayama H.; Kohama M.; Matsumura T.; Matsuoka M.; Morii M.; Nakajima M.; Negoro H.; Shidatsu M.; Sootome T.; Sugimori K.; Sugizaki M.; Suwa F.; Toizumi T.

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Peculiarly narrow SED of GRB090926B with MAXI and Fermi/GBM

机译：具有MAXI和Fermi / GBM的GRB090926B的特窄SED

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The monitor of the all-sky X-ray image (MAXI) Gas Slit Camera (GSC) on the International Space Station (ISS) detected a gamma-ray burst (GRB) on 2009, September 26, GRB090926B. This GRB had extremely hard spectra in the X-ray energy range. Joint spectral fitting with the Gamma-ray Burst Monitor on the Fermi Gamma-ray Space Telescope shows that this burst had a peculiarly narrow spectral energy distribution, which can be represented by a Comptonized blackbody model. This spectrum can be interpreted as photospheric emission from a low baryon-load GRB fireball. Calculating the parameter of the fireball, we found the size of the base of the flow to be r _0 = (4.3±0.9) × 10 ~9 Y' ~(-3/2) cm, the Lorentz factor of the plasma is Γ = (110±10) Y' ~(1/4), where Y' is a ratio between the total fireball energy and the energy in the blackbody component of the gamma-ray emission. This r _0 is a factor of a few times larger, and the Lorentz factor of 110 is smaller by also factor of a few than other bursts that have blackbody components in the spectra.

机译：2009年9月26日，国际空间站（ISS）上的全天空X射线图像（MAXI）气隙照相机（GSC）的监视器检测到伽马射线暴（GRB），GRB090926B。该GRB在X射线能量范围内具有极硬的光谱。费米伽马射线太空望远镜上的伽马射线爆裂监测器与光谱的联合拟合表明，这种爆裂具有特别窄的光谱能量分布，可以用康普顿黑体模型表示。该光谱可以解释为来自低重载GRB火球的光球发射。计算火球的参数，我们发现流基的大小为r _0 =（4.3±0.9）×10〜9 Y'〜（-3/2）cm，等离子的洛伦兹因子为Γ =（110±10）Y'〜（1/4），其中Y'是火球总能量与伽马射线发射黑体分量能量之间的比率。 r _0是大数倍的因数，而110的洛伦兹因数也比光谱中具有黑体成分的其他猝发小了数倍。

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《PASJ: Publications of the Astronomical Society of Japan》 |2011年第s3期|共6页
作者
Serino M.; Yoshida A.; Kawai N.; Nakagawa Y.E.; Mihara T.; Ueda Y.; Nakahira S.; Eguchi S.; Hiroi K.; Ishikawa M.; Isobe N.; Kimura M.; Kitayama H.; Kohama M.; Matsumura T.; Matsuoka M.; Morii M.; Nakajima M.; Negoro H.; Shidatsu M.; Sootome T.; Sugimori K.; Sugizaki M.; Suwa F.; Toizumi T.;
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正文语种 eng
中图分类天文学;
关键词
Gamma rays: Bursts; Methods: Data analysis;

机译：伽玛射线：爆发;方法：数据分析;

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1. Peculiarly narrow SED of GRB090926B with MAXI and Fermi/GBM [J] . Serino M., Yoshida A., Kawai N., PASJ: Publications of the Astronomical Society of Japan . 2011,第S3期

机译：具有MAXI和Fermi / GBM的GRB090926B的特窄SED
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机译：MAXI / GSC和Fermi / GBM观测到的12 Be脉冲星爆发期间光度和自旋周期变化之间的相关性
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Peculiarly narrow SED of GRB090926B with MAXI and Fermi/GBM

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