A Possible 456-Day Optical Period of OQ 530

Details A Possible 456-Day Optical Period of OQ 530 A Possible 456-Day Optical Period of OQ 530

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007chjaa...7..380l&link_type=abstract

Chinese Journal of Astronomy and Astrophysics, Volume 7, Issue 3, pp. 380-388 (2007).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The post-1994 observations of the blazar OQ 530 in optical BVRI bands, and radio observations at 22 GHz and 37 GHz were collected. The date compensated discrete Fourier transform (DCDFT) and CLEANest methods were used to search for possible periodicities. Two possible periods of 456±100 days and 258±29 days were found in the optical bands. The existence of possible correlations between the optical and radio emissions was investigated by means of discrete correlation function (DCF) analysis, and no significant correlation was found. Some possible mechanisms for the periodic variability are discussed.

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