期刊
ASTROPHYSICAL JOURNAL
卷 766, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/766/1/41
关键词
gamma-ray burst: individual (GRB 111117A)
资金
- Swift mission [NNX12AE75G]
- Danish National Research Foundation
- Chandra Cycle 13 grant [GO2-13084X]
- Spanish research projects [AYA2011-24780/ ESP, AYA200914000-C03-01/ESP, AYA2010-21887-C04-01]
- Swedish Research Council [623-2011-7117]
- Hungarian Science Research Program (OTKA) [K-81421]
- Lendulet Young Researchers' Program of the Hungarian Academy of Sciences
- European Commission under the Marie Curie IEF Programme
- Creative Research Initiative program, of the National Research Foundation of Korea (NRFK) [2010-0000712]
- Korean government (MEST)
- Grants-in-Aid for Scientific Research [24103002, 24103001] Funding Source: KAKEN
We present our successful Chandra program designed to identify, with subarcsecond accuracy, the X-ray afterglow of the short GRB 111117A, which was discovered by Swift and Fermi. Thanks to our rapid target of opportunity request, Chandra clearly detected the X-ray afterglow, though no optical afterglow was found in deep optical observations. The host galaxy was clearly detected in the optical and near-infrared band, with the best photometric redshift of z = 1.31(-0.23)(+0.46) (90% confidence), making it one of the highest known short gamma-ray burst ( GRB) redshifts. Furthermore, we see an offset of 1.0 +/- 0.2 arcsec, which corresponds to 8.4 +/- 1.7 kpc, between the host and the afterglow position. We discuss the importance of using Chandra for obtaining subarcsecond X-ray localizations of short GRB afterglows to study GRB environments.
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