The 17-d periodicity of Cygnus X-3

Details The 17-d periodicity of Cygnus X-3 The 17-d periodicity of Cygnus X-3

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.266..749o&link_type=abstract

Nature, vol. 266, Apr. 21, 1977, p. 749; Reply, p. 749.

Astronomy and Astrophysics

Astronomy

1

Periodic Variations, Power Spectra, X Ray Sources, Background Noise, Root-Mean-Square Errors, Sky Surveys (Astronomy)

Scientific paper

The results of digitization and power-spectrum analysis of the primary data of Ariel V observations of the flux variations of Cygnus X-3, first reported by Holt et al. (1976), indicate that there is about 50% likelihood that there exists a 16.75-day periodicity, as suggested in the first report. In an accompanying reply, Holt concurs that the 16.75-day periodicity may be artifactual, but emphasizes that the possible periodicity was mentioned because the same effect was present in the Ariel V Sky Survey Experimental data, which constitute a completely independent set of data.

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