Is There a Supermassive Black Hole in the Nucleus of M31?

Details Is There a Supermassive Black Hole in the Nucleus of M31? Is There a Supermassive Black Hole in the Nucleus of M31?

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997sao..rept.....p&link_type=abstract

Technical Report, NASA-CR-205674; NAS 1.26:205674

Astronomy and Astrophysics

Astronomy

X Ray Sources, Andromeda Galaxy, Astrometry, Errors, Rosat Mission, Radii, X Rays, Black Holes (Astronomy)

Scientific paper

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 HRI observations of the region. We find a revised position of 0 hours 42 min 44.31 sec, 41 deg 16 min 6.7 sec (J2000), with a 90% error radius of 1.3 sec. Although this error circle formally excludes the nuclear radio source reported by Crane, Dickel, and Cowan, the radio source is included in the 99% x-ray error circle, and given the residual systematic uncertainties in the x-ray astrometry, we consider the association of the x-ray and radio sources to be still viable. Analysis of the superposition of three deep, ROSAT HRI observations also indicates the presence of a previously uncataloged source, approximately 17 sec to the east of the nuclear source.

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