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Astron. Astrophys. 330, 72-78 (1998)

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The hard X-ray source GRS 1734-292:
a Seyfert 1 galaxy behind the Galactic Center

J. Mart 1, I.F. Mirabel 1, S. Chaty 1 and L.F. Rodrguez 2

1 CEA/DSM/DAPNIA/Service d'Astrophysique, Centre d'Études de Saclay, F-91191 Gif/Yvette, France
2 Instituto de Astronoma, UNAM, Apdo. Postal 70-264, 04510 México D.F., Mexico

Received 20 August 1997 / Accepted 18 September 1997


The radio, infrared and optical counterparts of the hard X-ray source GRS 1734-292 ([FORMULA] =358 [FORMULA] 9, [FORMULA] =+1 [FORMULA] 4) are reported. The optical spectrum exhibits broad ([FORMULA] km s-1) H [FORMULA] emission at a redshift of 0.0214 [FORMULA] 0.0005. The radio counterpart is a double-sided synchrotron jet of 5 arcsec, which at a distance of 87 Mpc corresponds to a size of 2 kpc. The multiwavelength observations of GRS 1734-292 indicate that this X-ray source is a Seyfert 1 galaxy behind [FORMULA] magnitudes of visual absorption.

Key words: X-rays: galaxies – radio continuum: galaxies – galaxies: Seyfert – galaxies: individual: GRS 1734-292=NVSS J173728-290802 – Galaxy: center

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© European Southern Observatory (ESO) 1998

Online publication: January 8, 1998