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

Abstract

view Abstract Citations (4) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A search for optical pulsations from X-ray sources near lambda lambda 4640 - 4650 and lambda 4686. Canizares, C. R. ; McClintock, J. E. Abstract 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. Publication: The Astrophysical Journal Pub Date: August 1975 DOI: 10.1086/153775 Bibcode: 1975ApJ...200..177C Keywords: Light Emission; Pulsed Radiation; Stellar Radiation; X Ray Stars; Binary Stars; Emission Spectra; Luminous Intensity; Pulsars; X Ray Astronomy; Astronomy full text sources ADS | data products SIMBAD (5)