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	LIGO/Virgo S190425z: Insight-HXMT observation and counterpart search
	Guan, J; Nang, Y; Sai, N; Li, C. K; Liao, J. Y; Huang, Y; Yang, Y. J; Li, Z. W; Li, X. B; Li, G
	2019-05-02
出处	GRB Coordinates Network
英文摘要	LIGO/Virgo S190425z: Insight-HXMT observation and counterpart searchJ. Guan, Y. Nang, N. Sai, C, Wang, C. K. Li, J. Y. Liao, Y. Huang, Y. J. Yang, Z. W. Li, X. B. Li, G. Li, S. L. Xiong, L. Tao, C. Z.+Liu, X. L. Cao, Y. Chen, A. M. Zhang, Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N.+Zhang (IHEP), report on behalf of the Insight-HXMT team:We performed small area scan survey of the LIGO localization region with Insight-HXMT after the LVC trigger S190425z (LVC et al. GCN+24168). The observation started at 2019-4-25 16:28 UTC, about 8 hours after the trigger time. Four fields were visited, with+overlaps, mapping 987.2 square degrees of the bayestar map 90% credible region and covering a sky region totalling of 20.4% of the+LIGO localization likelihood. Each field was scanned twice and the total exposure time was 79.2 ks. No significant new source is+found in the region in search of the Insight-HXMT raw light curves.The survey also covered T2019ebq/PS19qp (Smith et al. GCN, 24210), a possible optical counterpart to S190425z, at 2019-04-26 02:12+UTC (for 400s) and 2019-04-26 15:06 UTC (for 250s). We find no significant new X-ray sources in the data. The 5-sigma flux upper+limits are obtained when fitting the light curves to the position of T2019ebq/PS19qp: 6.8 mCrab (HE：25-100 keV), 16.2 mCrab+(ME：7-40 keV) and 5.2 mCrab (LE：1-6 keV). The flux upper limits for other positions in the scanned fields are about the same as+quoted above.Further analysis will be reported in the following circulars.Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA)+and the Chinese Academy of Sciences (CAS). More information could be found at: http://www.hxmt.org.
内容类型	GCN
源URL	[http://ir.ihep.ac.cn/handle/311005/287615]
专题	硬X射线调制望远镜卫星 高能物理研究所_粒子天体物理中心 高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Guan, J,Nang, Y,Sai, N,et al. LIGO/Virgo S190425z: Insight-HXMT observation and counterpart search. 2019.

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