Power spectrum analysis of the soft X-ray emission of M81 nucleus.

Details Power spectrum analysis of the soft X-ray emission of M81 nucleus. Power spectrum analysis of the soft X-ray emission of M81 nucleus.

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arbei..33....1y&link_type=abstract

Astrophysics Reports, Publications of the Beijing Astronomical Observatory, No. 33, p. 1 - 6

Astronomy and Astrophysics

Astrophysics

Active Galactic Nuclei: X-Ray Variations, Liners: X-Ray Variations

Scientific paper

This paper will devote itself the detection of periodic X-ray variability of M81 nucleus. Using ROSAT PSPC pointed observation of M81 from Sep to Oct 3 in 1992, 9 individual continuous exposures, including the 3 longest ones of ≡3000 s, are analyzed with the aid of the PDS method. At the 99.9% confidence level no periodic X-ray variability on the timescale of <1 hour is detected in the PDS analysis. This result may suggest that the lack of rapid (<1 day) periodic variability may be an intrinsic behavior of AGNs. It will also offer an observational clue to the physical models of AGNs and LINERs.

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