Japelj 2011 用Gaia卫星观测伽马暴余辉的可能性

主要内容:
正常余辉5年10个，孤儿余辉可以有几十个。
奇怪的是正常余辉亮一些，应该容易观测一些才对啊。--应该是孤儿余辉由于张角的原因本来就比较多。
但愿真能观测到。

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Title:		Detectability of GRB optical afterglows with Gaia satellite
Authors:		Japelj, J.; Gomboc, A.
Publication:		eprint arXiv:1107.2858
Publication Date:		07/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		14 pages, 10 figures, accepted to PASP
Bibliographic Code:		2011arXiv1107.2858J

Abstract

With the launch of Gaia satellite, detection of many different types of transient sources will be possible, one of them being optical afterglows of gamma-ray bursts (GRBs). Using the knowledge of the satellites dynamics and properties of GRB optical afterglows we performed a simulation in order to estimate an average GRB detection rate with Gaia. Here we present the simulation results for two types of GRB optical afterglows, differing in the observer's line-of-sight compared to a GRB jet axis: regular (on-axis) and orphan afterglows. Results show that for on-axis GRBs, less than 10 detections in five years of foreseen Gaia operational time are expected. The orphan afterglows simulation results are more promising, giving a more optimistic number of several tens of detections in five years.

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