Revised Position of the X-ray Source near the Nucleus of M31

Session 49 - Elliptical Galaxies & Bulges.
Display session, Thursday, January 08
Exhibit Hall,

[49.09] Revised Position of the X-ray Source near the Nucleus of M31

F. Primini (Oregon State U.), E. Magnier (U. Washington), G. Hasinger (AIP)

We have determined a more accurate position for the x-ray source near the nucleus of M31, based on analysis of new ROSAT HRI observations and re-analysis of earlier ROSAT and Einstein HRI observations of the region. Our revised position is \sim1.6^\prime\prime south of the nuclear radio source discovered by Crane, Dickel, and Cowan (ApJ, 390, L9) and includes the radio source in its \sim2^\prime\prime radius, 99% error circle. Given the local x-ray source density, the chance occurrence of an x-ray source brighter than \sim10^36 erg s^-1 is \sim2%. Analysis of the superposition of three deep, ROSAT HRI observations also indicates the presence of a previously uncataloged source \sim17^\prime\prime to the east of the nuclear source.

Program listing for Thursday