A pilot study of catching high-z GRBs and exploring circumburst environment in the forthcoming SVOM era  

作　　者：Jing Wang Yu-Lei Qiu Jian-Yan Wei 

机构地区：[1]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [2]Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [3]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Research in Astronomy and Astrophysics》2020年第8期211-216,共6页天文和天体物理学研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.11773036 and 11533003);the Strategic Pioneer Program on Space Science,Chinese Academy of Sciences(Nos.XDA 15052600 and XDA 15016500);the Natural Science Foundation of Guangxi(2018GXNSFGA281007);by Bagui Young Scholars Program;support from the National Key Research and Development Project of China(No.2020YFE0202100)。

摘　　要：Rapid spectroscopy of GRB afterglows is an important and hard task.Based on the archival XSGRB spectral database,we here perform a pilot study on the afterglow's spectroscopy in the forthcoming SVOM era in two aspects.First,our simulation indicates that the color acquired from the SVOM/VT blue and red channels is effective in discriminating between low-z(z≤3)and distant GRB candidates until z^6.Second,by doubling the sample size,we find that the previously proposed global photoionization response of the circumburst gas to the prompt emission(i.e.,the CIV/CII-L(iso)/E2peak relationship)is roughly confirmed.although the confirmation is dissatisfactory at the large L(iso)/E2peak end.We believe that this issue can be further addressed in the SVOM era by a larger spectroscopy sample,thanks to its capability of rapid identification of optical candidates of afterglow and its anti-solar pointing strategy.

关 键 词：gamma ray bursts:general techniques:photometric techniques:spectroscopic methods:statistical 

分 类 号：P172.3[天文地球—天文学]