Reports

Optical Search for Pulsations from Pulsating Radio Source CP 1919

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Science  07 Jun 1968:
Vol. 160, Issue 3832, pp. 1104-1105
DOI: 10.1126/science.160.3832.1104

Abstract

Optical observations of the 18th magnitude blue star and of the faint red object in the approximate location of the pulsating radio source CP 1919 disclose no pulsations of visible light, in a mode similar to that of the radio pulsations, of more than 0.4 percent or 0.8 percent, respectively, of the total visible output; or, for a sinusoidal modulation with the same period, no more than a 4-percent, or 8-percent, root-mean-square intensity fluctuation.

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