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arXiv 1109.4064astro-ph.HEhep-ph
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长短伽马射线暴光变曲线的时间反褶积研究

Temporal Deconvolution study of Long and Short Gamma-Ray Burst Light curves

P. N. Bhat, Michael S. Briggs, Valerie Connaughton, Chryssa Kouveliotou, Alexander J. van der Horst, William Paciesas, Charles A. Meegan, Elisabetta Bissaldi, M… 展开作者

P. N. Bhat, Michael S. Briggs, Valerie Connaughton, Chryssa Kouveliotou, Alexander J. van der Horst, William Paciesas, Charles A. Meegan, Elisabetta Bissaldi, Michael Burgess, Vandiver Chaplin, Roland Diehl, Gerald Fishman, Gerard Fitzpatrick, Suzanne Foley, Melissa Gibby, Misty M. Giles, Adam Goldstein, Jochen Greiner, David Gruber, Sylvain Guiriec, Andreas von Kienlin, Marc Kippen, Sheila McBreen, Robert Preece, Arne Rau, Dave Tierney, Colleen Wilson-Hodge

摘要:

伽马射线暴(GRB)的光变曲线被认为是由反映GRB中心引擎活动的内部冲击引起的。它们的时间反卷积可以揭示两个GRB群体中中心引擎性质的电势差,这两个群体被认为是源于大质量恒星的死亡(长)和致密天体的合并(短)。本文介绍了费米伽玛射线空间望远镜上的伽马射线暴监测器对42个伽玛暴的时间分析结果。我们将轮廓解卷积成脉冲,我们用对数正态函数拟合。两种爆发类型的脉冲形状参数和相邻脉冲之间的间隔的分布是不同的,也符合对数正态函数。我们研究了这些参数在不同能带中的演变,发现它们在长爆发和短爆发之间存在差异。我们讨论了伽玛暴瞬发的内激波模型的框架内的长,短爆发的时间特性的差异的影响。

英文摘要:

The light curves of Gamma-Ray Bursts (GRBs) are believed to result from internal shocks reflecting the activity of the GRB central engine. Their temporal deconvolution can reveal potential differences in the properties of the central engines in the two populations of GRBs which are believed to originate from the deaths of massive stars (long) and from mergers of compact objects (short). We present here the results of the temporal analysis of 42 GRBs detected with the Gamma-ray Burst Monitor onboard the Fermi Gamma-ray Space Telescope. We deconvolved the profiles into pulses, which we fit with lognormal functions. The distributions of the pulse shape parameters and intervals between neighboring pulses are distinct for both burst types and also fit with lognormal functions. We have studied the evolution of these parameters in different energy bands and found that they differ between long and short bursts. We discuss the implications of the differences in the temporal properties of long and short bursts within the framework of the internal shock model for GRB prompt emission.

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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