A 15.7-min periodicity in OJ287

Details A 15.7-min periodicity in OJ287 A 15.7-min periodicity in OJ287

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.314..148v&link_type=abstract

Nature (ISSN 0028-0836), vol. 314, March 14, 1985, p. 148, 149. Research supported by the Academy of Finland.

Astronomy and Astrophysics

Astronomy

40

Bl Lacertae Objects, Periodic Variations, Radio Sources (Astronomy), Variable Stars, Amplitudes, Flux Quantization, Light Curve, Power Spectra

Scientific paper

The detection of a 15.7 min periodic flux variation in the BL Lac-type object OJ287, among the brightest and most violently variable objects in its class with a luminosity exceeding 10 to the 47th ergs/s at maximum light and a redshift of 0.306, is reported for April 1981 at 37 GHz. The source has subsequently been monitored for 265 hr at 22 and 37 GHz, as well as in optical photometry, and the same period has been seen in simultaneous observations. The peak-peak amplitude of the variation is 1-10 percent of the total intensity. Other periods may also exist.

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