Temporal and spectral X-ray variability from the Seyfert 1 galaxy NGC 6814

Details Temporal and spectral X-ray variability from the Seyfert 1 galaxy NGC 6814 Temporal and spectral X-ray variability from the Seyfert 1 galaxy NGC 6814

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254...93l&link_type=abstract

In: Testing the AGN paradigm; Proceedings of the 2nd Annual Topical Astrophysics Conference, Univ. of Maryland, College Park, Oc

Astronomy and Astrophysics

Astronomy

4

Light Curve, Periodic Variations, Seyfert Galaxies, X Ray Spectra, Data Flow Analysis, Ginga Satellite, X Ray Astronomy

Scientific paper

The Seyfert 1 galaxy NGC 6814 was observed with the Japanese X-ray astronomy satellite Ginga in April 1990 and October 1990. Rapid flux variability with a period of about 12000 seconds was confirmed. Furthermore, in the April observation, periodic dips in which the flux dropped nearly to zero were found. In the October observation, variability of the spectral index was found. Detailed analysis of these observations suggests an absorption model, which can explain the rapid changes in flux, as well as the apparent variability in the spectral index.

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