Balazs 2009 Swift的光学暂现源的survival分析

主要内容:
貌似是用来找孤儿余辉的.
(这不是一个正式文章, 等后续的东西吧.)

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· arXiv e-print (arXiv:0906.1268)

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Title:		Survival analysis of the Swift optical transient data
Authors:		Balazs, L. G.; Horvath, I.; Bagoly, Zs.; Meszaros, A.
Publication:		eprint arXiv:0906.1268
Publication Date:		06/2009
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics
Bibliographic Code:		2009arXiv0906.1268B

Abstract

In a systematic search of the OTs at GRBs the Swift satellite determined only an upper limit of the apparent brightness in a significant fraction of cases. Combining these upper limits with the really measured OT brightness we obtained a sample well suited to survival analysis. Performing a Kaplan-Meier product limit estimation we obtained an unbiased cumulative distribution of the V visual brightness. The lg(N(V)) logarithmic cumulative distribution can be well fitted with a linear function of V in the form of lg(N(V))= 0.234 V + const. We studied the dependence of V on the gamma ray properties of the bursts. We tested the dependence on the fluence, T90 duration and peak flux. We found a dependence on the peak flux on the 99.7% significance level.

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