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Astron. Astrophys. 318, 179-186 (1997)

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The optical counterpart of GRS 1009-45 (X-ray Nova Velorum 1993)

M. Della Valle 1, S. Benetti 2, E. Cappellaro 3 and C. Wheeler 4

1 Dipartimento di Astronomia, Università di Padova, Vicolo dell'Ossrevatorio 5, I-35122 Padova, Italy
2 European Southern Observatory, La Silla, Chile
3 Osservatorio Astronomico, Padova, Italy
4 Departmant of Astronomy, University of Texas, Austin, Texas, USA

Received 13 November 1995 / Accepted 22 June 1996


We report the discovery of the optical counterpart of the X-ray transient GRS 1009-45 (XN Vel 1993). From an analysis of photometric and spectroscopic observations at early and late stages, we are able to constrain the distance to the nova and the absolute magnitude of the late-type companion.

Key words: stars: novae – cataclysmic variables – neutron: stars – stars: GRS 1009 – 45=X-Nova Vel 1993

Send offprint requests to: M. Della Valle

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© European Southern Observatory (ESO) 1997

Online publication: July 8, 1998