EDP Sciences
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Volume 421, Number 1, July I 2004
Page(s) 229 - 233
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20034446

A&A 421, 229-233 (2004)
DOI: 10.1051/0004-6361:20034446

The extragalactic nature of GT 2318+620

J. M. Paredes1, J. Martí2, W. K. Scott3 and R. K. Zamanov4

1  Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain
2  Departamento de Física, Escuela Politécnica Superior, Universidad de Jaén, Virgen de la Cabeza 2, 23071 Jaén, Spain
    e-mail: jmarti@ujaen.es
3  Department of Physics and Astronomy, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada
    e-mail: bill@ras.ucalgary.ca
4  Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK
    e-mail: rz@astro.livjm.ac.uk

(Received 6 October 2003 / Accepted 1 March 2004)

We report optical and radio observations of GT 2318+620 , a previously proposed variable radio source at low galactic latitude. With the information available more than a decade ago, this object was considered to be a low-mass X-ray binary with radio jets. However, the galactic nature of GT 2318+620 was never confirmed. The new data presented here provide substantial evidence to rule out a galactic origin and point towards identification as an active extragalactic source.

Key words: galaxies: active -- X-rays: binaries

Offprint request: J. M. Paredes, jmparedes@ub.edu

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