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K. D. Kuntz (LHEA-UMBC JCA), P. Barmby (CfA), K. Mukai, S. L. Snowden (NASA GSFC-USRA)
Complete samples of X-ray point source populations within the Galaxy are difficult to obtain due to absorption and distance ambiguities. M101 is a nearby face-on spiral galaxy of a type somewhat later than the Galaxy, in a direction of low Galactic absorption (8.8 x 1019 cm-2). All of the point sources in M101 are at the same distance and are affected by no more than a moderate amount of internal absorption. It thus serves as an excellent laboratory for exploring the luminosity and spatial distribution of X-ray point sources. We have used a mosaic of 10 HST ACS fields in each of three colors to find the optical counterparts of X-ray sources found in a 92 ks Chandra observation of M101 in an attempt to constrain the nature of the underlying sources.
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.