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A Giant radio source identified with a Markarian Galaxy

H.J.A. Rottgering, Y. Tang, M.A.R. Bremer, A.G. de Bruyn, G.K. Miley, M.N. Bremer

Submitted 1994 15 September

1 Leiden Observatory, PO Box 9513, 2300 RA, Leiden, The Netherlands
2 Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge, CB3 0HE
3 Institute of Astronomy, Madingley Road, Cambridge, CB3 OHA
4 Radio Sterrenwacht, Dwingeloo, Postbus 2, 7990 AA Dwingeloo, The Netherlands
5 Stichting Ruimte Onderzoek Nederland, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
6 Kapteyn Astronomical Institute, Postbus 800, 9700 AV Groningen, The Netherlands


An FRII radio source with an angular extension of 18.4 arcminutes has been discovered in the Westerbork Northern Sky Survey that is being carried out at 325 MHz. This source is identified with Mrk 1498 at z = 0.056 indicating that its projected extension is 1.6 Mpc. The optical spectrum of Mrk 1498 has the typical emission lines of a narrow line radio galaxy: H_ is the only permitted line that has a faint broad component. The discovery shows that the good sensitivity of WENSS at low frequencies to low surface brightness features at scales of a few minutes, is uniquely suited to provide well defined and relatively large samples of giant radio galaxies. The future definition of such samples will be important for our understanding of giant radio galaxies.
Thu Apr 4 14:36:13 MET DST 1996