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arXiv 1007.0383astro-ph.HE
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Swift/Fermi GRB 080928从1 eV到150 keV

The Swift/Fermi GRB 080928 from 1 eV to 150 keV

A. Rossi, S. Schulze, S. Klose, D. A. Kann, A. Rau, H. A. Krimm, G. Jóhannesson, A. Panaitescu, F. Yuan, P. Ferrero, T. Krühler, J. Greiner, P. Schady, S. B. Pa… 展开作者

A. Rossi, S. Schulze, S. Klose, D. A. Kann, A. Rau, H. A. Krimm, G. Jóhannesson, A. Panaitescu, F. Yuan, P. Ferrero, T. Krühler, J. Greiner, P. Schady, S. B. Pandey, L. Amati, P. M. J. Afonso, C. W. Akerlof, L. Arnold, C. Clemens, R. Filgas, D. H. Hartmann, A. Küpcü Yoldaş, S. McBreen, T. A. McKay, A. Nicuesa Guelbenzu, F. Olivares E., B. Paciesas, E. S. Rykoff, G. Szokoly, A. C. Updike, A. Yoldaş

摘要:

我们提出了一个全面的研究结果的伽马射线暴080928及其余辉。GRB 080928是由Swift/BAT和Fermi/GBM探测到的长爆发。这是一个例外的情况下,光发射已经被检测到时,伽玛射线暴本身仍然辐射在伽马射线波段。对于近100秒的同时光学,X射线和伽马射线数据提供了从约1 eV到150 keV的瞬态源的光谱能量分布的覆盖范围。特别是,我们表明,在主要的即时发射阶段的SED同意与同步辐射。我们构建了基于Swift/UVOT、ROTSE-IIIa(澳大利亚)和GROND(La Silla)数据的光学/近红外线曲线和光谱能量分布,并将其与从Swift/XRT储存库检索的X射线光变曲线进行了比较。我们发现它的凹凸不平的形状可以通过多次能量注入到前向激波中来模拟。此外,我们还研究了早期X射线光变曲线中第一个强耀斑尾部发射的时间和光谱演化是否可以用大角度发射(LAE)来解释。我们发现,一个非标准的LAE模型需要解释的意见。最后,我们报告的结果,我们的搜索伽玛射线暴的宿主星系,其中只有一个深上限可以提供。

英文摘要:

We present the results of a comprehensive study of the gamma-ray burst 080928 and of its afterglow. GRB 080928 was a long burst detected by Swift/BAT and Fermi/GBM. It is one of the exceptional cases where optical emission had already been detected when the GRB itself was still radiating in the gamma-ray band. For nearly 100 seconds simultaneous optical, X-ray and gamma-ray data provide a coverage of the spectral energy distribution of the transient source from about 1 eV to 150 keV. In particular, we show that the SED during the main prompt emission phase agrees with synchrotron radiation. We constructed the optical/near-infrared light curve and the spectral energy distribution based on Swift/UVOT, ROTSE-IIIa (Australia), and GROND (La Silla) data and compared it to the X-ray light curve retrieved from the Swift/XRT repository. We show that its bumpy shape can be modeled by multiple energy-injections into the forward shock.Furthermore, we investigate whether the temporal and spectral evolution of the tail emission of the first strong flare seen in the early X-ray light curve can be explained by large-angle emission (LAE). We find that a nonstandard LAE model is required to explain the observations. Finally, we report on the results of our search for the GRB host galaxy, for which only a deep upper limit can be provided.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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