主要内容:
Try to solve the achromatic break for X-ray and Optical afterglow, by saying that the breaks for X-ray are hidden.
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文章信息:
- arXiv e-print (arXiv:0801.1449)
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| Title: |
| The hidden X-ray breaks in afterglow light curves |
| Authors: |
| Curran, P. A.; van der Horst, A. J.; Wijers, R. A. M. J.; Starling, R. L. C. |
| Publication: |
| eprint arXiv:0801.1449 |
| Publication Date: |
| 01/2008 |
| Origin: |
| ARXIV |
| Keywords: |
| Astrophysics |
| Comment: |
| 4 pages, contributed talk, submitted to the proceedings of Gamma Ray Bursts 2007, Santa Fe, New Mexico, November 5-9 2007 |
| Bibliographic Code: |
| 2008arXiv0801.1449C |
Abstract
Gamma-Ray Burst (GRB) afterglow observations in the Swift era have a perceived lack of achromatic jet breaks compared to the BeppoSAX, or pre-Swift era. Specifically, relatively few breaks, consistent with jet breaks, are observed in the X-ray light curves of these bursts. If these breaks are truly missing, it has serious consequences for the interpretation of GRB jet collimation and energy requirements, and the use of GRBs as standard candles. Here we address the issue of X-ray breaks which are possibly 'hidden' and hence the light curves are misinterpreted as being single power-laws. We show how a number of precedents, including GRB 990510 & GRB 060206, exist for such hidden breaks and how, even with the well sampled light curves of the Swift era, these breaks may be left misidentified. We do so by synthesising X-ray light curves and finding general trends via Monte Carlo analysis. Furthermore, in light of these simulations, we discuss how to best identify achromatic breaks in afterglow light curves via multi-wavelength analysis.
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