Abstract
view Abstract Citations (32) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Optical counterparts for X-ray sources in M 31. Crampton, D. ; Cowley, A. P. ; Hutchings, J. B. ; Schade, D. J. ; van Speybroeck, L. P. Abstract Einstein Observatory X-ray position (both IPC and HRI) for 117 sources around M31 have been examined with 1000 A/mm slitless spectral plates obtained at the prime focus of the Canada-France-Hawaii Telescope (CFHT). A variety of possible counterparts is found within the error circles of the source positions, including globular clusters, foreground stars, faint blue stars, and a compact galaxy. For about half of the sources, no candidate object sufficiently near the X-ray position was visible on the plates which reach to a B-mag of about -3.5. Crowding in the nucleus of M31 made it impossible to examine the source positions less than 2 to 3 arcmin from the center of the galaxy. This paper lists all sources with their suggested optical identifications and gives finding charts for some of the stars. A brief comparison is made among the X-ray sources in M31, the Magellanic Clouds, and the Galaxy. Publication: The Astrophysical Journal Pub Date: September 1984 DOI: 10.1086/162448 Bibcode: 1984ApJ...284..663C Keywords: Andromeda Galaxy; Blue Stars; Globular Clusters; Radio Sources (Astronomy); Supernova Remnants; X Ray Sources; B Stars; Compact Galaxies; Magellanic Clouds; Milky Way Galaxy; O Stars; Optical Emission Spectroscopy; Astronomy full text sources ADS | data products SIMBAD (86) NED (2)
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