Photometry of X Persei in late 1978

Details Photometry of X Persei in late 1978 Photometry of X Persei in late 1978

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95....3m&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 1, Feb. 1981, p. 3, 4. Research supported by the Smithsonian Research Foundation and Is

Astronomy and Astrophysics

Astrophysics

10

Pulsars, Stellar Radiation, Stellar Spectrophotometry, X Ray Stars, H Beta Line, Stellar Motions, Ubv Spectra, X Ray Sources

Scientific paper

X Persei optical intensity has been monitored during seven consecutive nights in late 1978. Observations included the usual UBV broad bands as well as narrow bands around H-beta and He II 4686. Some activity of about 0.05 mag., on a time scale of several hours has been detected, mainly in the U-band. Here, as in previous observations, no clear periodicity is apparent, including the probable period of 11.2h or 22.4h of the assumed companion 3U0352 + 30. The upper limit of 0.02 mag. coherent modulation of H-beta emission makes these periods unlikely.

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