X-ray Source Catalog

Description

This data set is a catalog of sources as observed by the HEAO A-1 Large Area Sky Survey Experiment. The catalog is derived from the first six months of data from HEAO A-1, during which time one scan of the entire sky was completed. Positions and intensities for 842 sources are cataloged, with a limiting flux of 250 nJy at 5 keV, or about 0.25 UFU. The catalog is more than 90% complete at a flux level equivalent to 1.5 Jy at 5 keV, for a Crablike spectrum. Included are source positions in 1950.0 RA and Dec, plus the four corners of a 95% confidence error box and the solid angle enclosed by the error box, position in galactic and ecliptic longitude and latitude, apparent source intensity, and identification of the source with other cataloged objects.