Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..175p&link_type=abstract
International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 175 - 176
Astronomy and Astrophysics
Astrophysics
X-Ray Transients: Black Holes, X-Ray Transients: Outbursts
Scientific paper
Using ROSAT PSPC and Einstein SSS and MPC archival data the authors have found two previously unreported outbursts from the ultra-soft X-ray transient 4U 1630-47 that occurred in 1979 March and 1992 September. The times of these outbursts are consistent with a previously reported ≡600 d outburst recurrence period, as is the subsequent non-detection of the source by ROSAT in 1993 March and August. 4U 1630-47 is a member of the class of transient X-ray binary systems that are thought to contain black holes. The 601.0±2.8 d recurrence period of 4U 1630-47 is by far the shortest known for this class.
Angelini Leonardo
Parmar Arvind N.
White Nicholas E.
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