NED Abstract 
Copyright by American Astronomical Society.
Reproduced by permission

1992ApJS...80..531F

                 AN X-RAY CATALOG AND ATLAS OF GALAXIES

                G. FABBIANO, D.-W. KIM, AND G. TRINCHIERI
             Received 1991 May 20; accepted 1991 September 4

                                ABSTRACT
   We present an X-ray catalog and atlas of galaxies observed with the
Einstein Observatory imaging instruments (IPC and HRI). The catalog
comprises 493 galaxies, including targets of pointed observations, and
RSA or RC2 galaxies serendipitously included in Einstein fields. A total
of 450 of these galaxies were imaged well within the instrumental fields,
resulting in 238 detections and 212 3{sigma} upper limits. The other
galaxies were either at the edge of the visible field of view or confused
with other X-ray sources. For these we also give a rough measure of their
X-ray emission. The atlas shows X-ray contour maps of detected galaxies
superposed on optical photographs and gives azimuthally averaged surface
brightness profiles of galaxies detected with high signal-to-noise ratio.

Subject headings: atlases - catalogs - Galaxy: structure - X-rays:
galaxies