Abstract
THE optical system recently identified1 with the X-ray source Cen X-3 is an obvious candidate for high frequency optical studies because it provides the possibility of observing optical effects related to the 4.842 s X-ray pulsations2. Observations of this object were made at Cerro Tololo using an S-20 photomultiplier with no filter and making 1-ms integrations on to magnetic tape. The data were analysed by Fourier techniques similar to those used in the HZ Her study3. No clear harmonic activity emerged, and the average upper limits of the optical pulsations for three sets of data were found to be 0.031%, 0.11%, and 0.14% (Table 1).
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References
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LASKER, B. Search for optical pulsations from Cen X-3. Nature 250, 308–309 (1974). https://doi.org/10.1038/250308b0
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DOI: https://doi.org/10.1038/250308b0
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