OPTICAL-IDENTIFICATION OF JOINT EUVE AND ROSAT DETECTIONS IN THE SOUTHERN-HEMISPHERE - SOFT ACTIVE GALACTIC NUCLEI

We report the optical identification of six sources detected in the sa me directions during the all-sky surveys conducted by the Extreme Ultr aviolet Explorer (EUVE) satellite in the 58-174 Angstrom (0.071-0.214 keV) extreme ultraviolet (EUV) band and the ROSAT Position Sensitive P roportional Counter (PSPC) in the 0.1-2.4 keV X-ray band. All the sour ces correspond to newly discovered active galactic nuclei (one quasi-s tellar object, four Seyfert I galaxies, and one Seyfert Il galaxy) in the redshift range z = 0.071-0.382 and are the most likely counterpart s of the ROSAT PSPC X-ray sources. In two cases the sources are also t he most probable optical counterparts of the EUV detections while in t he remaining cases further observations are needed to confirm the EUV identification. We discuss the EUV to soft X-ray properties of these ' 'soft'' active galactic nuclei. (C) 1997 American Astronomical Society .