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Science 7 June 1968:
Vol. 160. no. 3832, pp. 1104 - 1105
DOI: 10.1126/science.160.3832.1104
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Articles

Optical Search for Pulsations from Pulsating Radio Source CP 1919

C. Papaliolios 1, N. P. Carleton 1, P. Horowitz 2, and W. Liller 3

1 Smithsonian Astrophysical Observatory, Cambridge, Massachusetts 02138
2 Lyman Laboratory, Harvard University, Cambridge, Massachusetts 02138
3 Harvard College Observatory, Cambridge, Massachusetts 02138

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.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Photoelectric and Spectroscopic Observations Related to a Possible Optical Counterpart for Pulsar CP 1919+21.
R. Lynds, S. P. Maran, and D. E. Trumbo (1968)
Science 161, 42-43
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Science. ISSN 0036-8075 (print), 1095-9203 (online)