Compact extragalactic objects - A search for 160-minute periodicity in the X-ray data

Details Compact extragalactic objects - A search for 160-minute periodicity in the X-ray data Compact extragalactic objects - A search for 160-minute periodicity in the X-ray data

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pazh...16..771l&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 16, Sept. 1990, p. 771-781. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

1

Light Curve, Quasars, Seyfert Galaxies, X Ray Astronomy, Active Galactic Nuclei, Ariel 5 Satellite, Astronomical Spectroscopy, Exosat Satellite, X Ray Spectra

Scientific paper

Data on the X-ray variability of the Seyfert 1 galaxies NGC 4051 and 4151 collected by the Ariel-5 and Exosat satellites are examined. It is revealed that a statistically significant 160.010 min period with a harmonic amplitude of 4-9 percent exists. It is predicted that the same periodicity exists for the nucleus of the third Seyfert, MCG-6-30-15. Results from this study support with earlier theories concerning the 'ubiquitous' status of the 160 min oscillations, based on observations of the sun and the nuclei of other Seyfert galaxies and the quasar 3C 273.

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