Optical identification of serendipitous Einstein X-ray sources: luminosity and redshift relations in the X-ray and optical emission from active galaxies and quasars

Journal Article · Wed Sep 15 04:00:00 EDT 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160267· OSTI ID:6576905

Reichert, G A; Mason, K O; Thorstensen, J R; Bowyer, S

We have optically identified 40 objects from a sample of 139 serendipitous Einstein X-ray sources. Thirteen of the sources are identified with galactic counterparts, and 27 are identified with extragalactic counterparts. The galactic counterparts include normal bright (V<10) stars, emission line stars, RS CVn stars, and cataclysmic variables; these are similar in their X-ray properties to other galactic objects observed at X-ray wavelengths. All but one of the extragalactic counterparts are active galactic nuclei (AGNs). The optical spectra of the X-ray selected AGNs are indistinguishable from those of AGNs discovered by their radio or optical emission. We have combined our sample of X-ray selected AGNs with other samples of X-ray selected and previously cataloged AGNs in order to investigate correlations between their optical and X-ray properties.

• Research Organization: Space Sciences Laboratory, University of California, Berkeley
• OSTI ID: 6576905
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 260:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics &amp; Cosmology-- Quasi-Stellar
Radio
&amp; X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
GALAXY NUCLEI
IONIZING RADIATIONS
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUASARS
RADIATIONS
RED SHIFT
SPECTRA
VISIBLE RADIATION
X RADIATION