Zheng 2009 GRB 060927的红移观测

主要内容:
给了photometric redshift. 主要是展示TNT望远镜.

GRB 050814(z = 5.3), GRB 050904 (z = 6.3), GRB 060522 (z = 5.1) and GRB 060927 (z = 5.5), GRB 090423 (z=8.3)

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Title:		A GRB Follow-up System at the Xinglong Observatory and Detection of the High-Redshift GRB 060927
Authors:		Zheng, Wei-Kang; Deng, Jin-Song; Zhai, Meng; Xin, Li-Ping; Qiu, Yu-Lei; Wang, Jing; Lu, Xiao-Meng; Wei, Jian-Yan; Hu, Jing-Yao
Publication:		Chinese Journal of Astronomy and Astrophysics, Volume 8, Issue 6, pp. 693-699 (2008).
Publication Date:		12/2008
Origin:		IOP
DOI:		10.1088/1009-9271/8/6/08
Bibliographic Code:		2008ChJAA...8..693Z

Abstract

A gamma-ray burst (GRB) optical photometric follow-up system at the Xinglong Observatory of National Astronomical Observatories of China (NAOC) has been constructed. It uses the 0.8-m Tsinghua-NAOC Telescope (TNT) and the 1-m EST telescope, and can automatically respond to GRB Coordinates Network (GCN) alerts. Both telescopes slew relatively fast, being able to point to a new target field within ~1 min upon a request. Whenever available, the 2.16-m NAOC telescope is also used. In 2006 the system responded to 15 GRBs and detected seven early afterglows. In 2007 six GRBs have been detected among 18 follow-up observations. TNT observations of the second most distant GRB 060927 (z = 5.5) are shown, which started as early as 91 s after the GRB trigger. The afterglow was detected in the combined image of the first 19×20 s unfiltered exposures. This GRB follow-up system has joined the East-Asia GRB Follow-up Observation Network (EAFON).

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