Variability of the X ray sources in M31

Details Variability of the X ray sources in M31 Variability of the X ray sources in M31

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..359c&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 1: X Ray Binaries p 359-364 (SEE N90-25711 19-89)

Astronomy and Astrophysics

Astronomy

Light Curve, Periodic Variations, Spectrum Analysis, X Ray Binaries, Brightness Distribution, Heao 2, Stellar Luminosity, Stellar Orbits, Stellar Spectra

Scientific paper

The Einstein observations of M31, looking for variability of the X-ray sources up to time scales of approximately 100,000 are analyzed. Two sources are significantly variable. The characteristics of their variability are discussed and constraints on their possible periodicity are derived. The observed X-ray luminosities, the pattern of variability, and the optical identifications suggest the possibility that one of them is low mass X-ray binary and the other one a compact massive X-ray binary.

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