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Issue A&A
Volume 375, Number 2, August IV 2001
Page(s) 447 - 454
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20010855



A&A 375, 447-454 (2001)
DOI: 10.1051/0004-6361:20010855

The IR counterpart of the black-hole candidate 4U 1630-47

T. Augusteijn1, E. Kuulkers2, 3 and M. H. van Kerkwijk3

1  Isaac Newton Group of Telescopes, Apartado de Correos 321, 38700 Santa Cruz de La Palma, Canary Islands, Spain
2  Space Research Organization Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
3  Astronomical Institute, Utrecht University, PO Box 80000, 3508 TA Utrecht, The Netherlands

(Received 2 February 2001 / Accepted 8 June 2001 )

Abstract
We present K band photometry of the region including the radio error box of the soft X-ray transient 4U 1630-47 during its 1998 outburst. We detect a variable source at K=16.1 mag located inside the radio error circle which we identify as the counterpart to the X-ray source. We discuss the properties of the source, and conclude that it is most likely a black-hole X-ray binary similar to 4U 1543-47 , GRO J1655-40 or SAX J1819.3-2525 , containing a relatively early-type secondary.


Key words: accretion, accretion disks -- stars: individual: 4U 1630-47 -- X-rays: stars

Offprint request: T. Augusteijn, tau@ing.iac.es

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© ESO 2001


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