Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199l...9b&link_type=abstract
Astrophysical Journal, vol. 199, July 1, 1975, pt. 2, p. L9-L11.
Astronomy and Astrophysics
Astrophysics
42
Galactic Clusters, Optical Properties, Pulsars, Spiral Galaxies, X Ray Sources, Astronomical Photometry, Galactic Radiation, Light Emission, Uhuru Satellite
Scientific paper
Optical studies are reported for a representative sample of 10 unidentified high galactic latitude X-ray sources that are north of declination minus 25 deg and that have 3U error boxes less than or of the order of 0.5 square degrees. The source 3U 1410-03 is identified with a peculiar emission-line spiral galaxy, NGC 5506, and a distance group 4 rich cluster of galaxies, Abell 2142, is suggested as a possible identification for 3U 1555+27. It is shown that very few of the unidentified high galactic latitude sources are quasi-stellar sources brighter than 17.5 mag, although one possible X-ray quasar, NAB 0137-01, is reported.
Bahcall John N.
Bahcall Neta A.
Murray Stephen S.
Schmidt Matthias
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