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タイトルGRB070610: A Curious Galactic Transient
著者(英)Pollack, L. K.; Ofek, E. O.; Cummings, J.; Barthelmy, S.; Sato, G.; Price, P. A.; Campana, S.; Gehrels, N.; Krimm, H. A.; Cameron, P. B.; Fox, D. B.; Krivonos, R. A.; Rau, A.; Markwardt, C. B.; Frail, D.; Berger, E.; Chandra, P.; Bloom, J. S.; Soderberg, A. M.; Sunyaev, R. A.; Kasliwal, M. M.; Grebenev, S. A.; Perley, D. A.; Nakar, E.; Kulkrarni. S. R.
著者所属(英)NASA Goddard Space Flight Center
発行日2007-11-05
言語eng
内容記述GRB 070610 is a typical high-energy event with a duration of 5s.Yet within the burst localization we detect a highly unusual X-ray and optical transient, SwiftJ195509.6+261406. We see high amplitude X-ray and optical variability on very short time scares even at late times. Using near-infrared imaging assisted by a laser guide star and adaptive optics, we identified the counterpart of SwiftJl95509.6+261406. Late-time optical and near-infrared imaging constrain the spectral type of the counterpart to be fainter than a K-dwarf assuming it is of Galactic origin. It is possible that GRB 070610 and Swift J195509.6+261406 are unrelated sources. However, the absence of a typical X-ray afterglow from GRB 070610 in conjunction with the spatial and temporal coincidence of the two motivate us to suggest that the sources are related. The closest (imperfect) analog to Swift J195509.6+261406 is V4641 Sgr, an unusual black hole binary. We suggest that Swift J195509.6+261406 along with V4641 Sgr define a sub-class of stellar black hole binaries -- the fast X-ray novae. We further suggest that fast X-ray novae are associated with bursts of gamma-rays. If so, GRB 070610 defines a new class of celestial gamma-ray bursts and these bursts dominate the long-duration GRB demographics
NASA分類Astronomy
権利Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/273069


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