The long-term optical behaviour of X Per = 3U 0352+30

Details The long-term optical behaviour of X Per = 3U 0352+30 The long-term optical behaviour of X Per = 3U 0352+30

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..427h&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 1: X Ray Binaries p 427-431 (SEE N90-25711 19-89)

Astronomy and Astrophysics

Astronomy

1

Light Curve, Photometry, Variability, X Ray Stars, Astronomical Photography, Light (Visible Radiation), Stellar Luminosity, Stellar Spectra, Variable Stars

Scientific paper

The variable star X Per, an optical counterpart to the X-ray binary 3U 0352+30, was investigated. Photographic plates taken at the Sonneberg and Ondrejov Observatories and numerous visual observations provided by amateur astronomers were used. The data set corresponds to the time interval 1933 to 1988. The investigations allow long-term light changes to be analyzed. The most significant results are given and discussed. The possible very long term light changes with amplitude of nearly 0.6 in B and an apparent period of nearly 40 years were revealed.

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