Very long-term photometry of HZ Her=Her X-1 and V1727 CYG=4U2127+47: Active and inactive states

Details Very long-term photometry of HZ Her=Her X-1 and V1727 CYG=4U2127+47: Active and inactive states Very long-term photometry of HZ Her=Her X-1 and V1727 CYG=4U2127+47: Active and inactive states

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.236..267h&link_type=abstract

In ESA Recent Results on Cataclysmic Variables p 267-271 (SEE N86-20287 10-93)

Astronomy and Astrophysics

Astronomy

3

Astronomical Photography, Binary Stars, Stellar Spectrophotometry, X Ray Sources, Light Curve, Stellar Activity, X Ray Astronomy

Scientific paper

Very long-term photographic monitoring of X-ray binary systems HZ Her=Her X-1 and V1727 Cyg=4U 2127+47 provided data on their long-term evolution and behavior. The long-term behavior of both objects is similar, showing drastic changes of luminosity between active and inactive states, suggesting that the physical properties of both systems are analogous. The significance of long-term optical monitoring in X-ray astronomy is discussed.

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