The extragalactic nature of GT 2318+620

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

Corresponding author: J. M. Paredes, jmparedes@ub.edu

Received: 6 October 2003
Accepted: 1 March 2004

Abstract

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.