Periodic Variations in the SCO X-1 Radio Emission

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Session 55 -- Interacting Binaries: CVs and XRBs
Display presentation, Thursday, January 13, 9:30-6:45, Salons I/II Room (Crystal Gateway)

[55.13] Periodic Variations in the SCO X-1 Radio Emission

C. Bradshaw, B. Geldzahler (GMU), E. Fomalont (NRAO)

SCO X-1 data from 6 cm VLA observations during 1981-1990 were analyzed for periodic or quasi-periodic variations. The data analysis included both standard FFT based periodogram and mean-square fitting. A periodogram algorithm developed by Lomb (1976) and Scargle (1982) provided statistical indicators of the periodic probabilities. The Lomb-Scargle periodogram tests the significance of the sampled data assuming Gaussian noise processes. Through the analysis, we have discovered a periodic signal which we will discuss.

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