A search for optical pulsations from X-ray sources near 4640-4650 A and 4686 A

Details A search for optical pulsations from X-ray sources near 4640-4650 A and 4686 A A search for optical pulsations from X-ray sources near 4640-4650 A and 4686 A

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...200..177c&link_type=abstract

Astrophysical Journal, vol. 200, Aug. 15, 1975, pt. 1, p. 177-181. Research supported by the Alfred P. Sloan Foundation and NAS

Astronomy and Astrophysics

Astronomy

5

Light Emission, Pulsed Radiation, Stellar Radiation, X Ray Stars, Binary Stars, Emission Spectra, Luminous Intensity, Pulsars, X Ray Astronomy

Scientific paper

We have searched for periodic optical pulsations from Cyg X-1, Cyg X-2, 3 U 1700 - 37, Her X-1, Sco X-1, Vela X-1, SMC X-1, WRA 977, and from the central region of the Cygnus Loop. Most observations were confined to the spectral features around 4640-4650 A and 4686 A, which are seen in most X-ray source counterparts, are known to be variable, and are likely to be associated with the X-ray emission. No optical pulsations were detected, but upper limits are established and related to the X-ray behavior.

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