The emission line galaxy TV Reticuli
Evidence for an ultraluminous supernova
European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: email@example.com
2 Departamento de Astronomía y Astrofísica, Pontificia Universidad Católica, Casilla 306, Santiago 22, Chile
3 Zentrum für Astronomie, ITA, Universität Heidelberg, Albert-Überle-Str. 2, 69120 Heidelberg, Germany
Accepted: 10 October 2006
Aims.TV Ret was classified as a cataclysmic variable due to an outburst observed in 1977. We intended to confirm this classification and derive some basic properties of the system.
Methods.Low resolution optical spectra were obtained for a spectral classification of the object.
Results.We find that the object is not a cataclysmic variable but an emission line galaxy with a redshift . An R-image taken in very good seeing conditions shows that the object is extended.
Conclusions.We show that TV Ret is a blue dwarf galaxy, probably compact, with an absolute magnitude of MB = -17.5, a metallicity of 0.12 solar, and an average temperature of K. The line ratios place it among the H II galaxies, although close to the border of the Seyfert 2s. The outburst, which was observed in 1977, could thus be explained by a supernova explosion. However, with an absolute magnitude around MB = -21, it was an extremely bright one.
Key words: stars: dwarf novae / stars: individual: TV Ret / galaxies: dwarf / galaxies: starburst / galaxies: active
© ESO, 2007