Bloom 2008 GRB 080319B的观测

主要内容:
给出了这个暴的主要是光学和X射线的观测。

精彩摘抄:
X射线和光学的光变

详细的光学的不同波段的光变
几个高亮瞬时光学的光变

文章信息:

· arXiv e-print (arXiv:0803.3215)

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Title:		Observations of the Naked-Eye GRB 080319B: Implications of Nature's Brightest Explosion
Authors:		Bloom, J. S.; Perley, D. A.; Li, W.; Butler, N. R.; Miller, A. A.; Kocevski, D.; Foley, R. J.; Chen, H. -W.; Filippenko, A. V.; Starr, D. L.; Macomber, B.; Prochaska, J. X.; Chornock, R.; Kann, D. A.; Poznanski, D.
Publication:		eprint arXiv:0803.3215
Publication Date:		03/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		Submitted to ApJ
Bibliographic Code:		2008arXiv0803.3215B

Abstract

The first gamma ray burst (GRB) confirmed to be bright enough to be seen with the naked eye, GRB~080319, allowed for exquisite follow-up across the electromagnetic spectrum. We present our detailed optical and infrared observations of the afterglow of the event, which started 122~s after the GRB trigger in concert with our own analysis of the Swift UVOT, BAT, and XRT data. Despite high quality measurements from about 5500 images, there seems to be no evidence for a significant amount of dust extinction in the host frame. We find significant color evolution in the optical afterglow: starting at about 1000~s the index shifts blueward before apparently shifting back to the red at late times. We compare the optical light curve of GRB 080319B with the most luminous probes of the distant universe, GRB 990103 and GRB 050904, and find GRB 080319B to be the most luminous explosion ever seen. Finally, we examine the detectability of such events with current and future facilities. We find that such an event could be detected in gamma rays by BAT out to $z$ = 4.9 ($8\sigma$), while the nominal EXIST sensitivity would allow detection to $z$ = 12.2.

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