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The Flux and Spectral Variability of NGC6814 as Observed with EXOSAT

Published online by Cambridge University Press:  07 August 2017

J.P.D. Mittaz  and
G. Branduardi-Raymont
J.P.D. Mittaz
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, ENGLAND
G. Branduardi-Raymont
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, ENGLAND

Extract

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We observed the Seyfert galaxy NGC6814 five times with EXOSAT between September 1983 and October 1985. For a more detailed description of the data see Mittaz and Branduardi-Raymont (1988). Between observations both the LE (0.02 - 2.5 keV) and ME (2 - 6 keV) fluxes vary in the same sense, NGC6814 being brightest during observation 1 and weakest during observation 3 when it was undetected by the CMA. Both variable luminosity and variable low-energy absorption can explain this.

Type
Part 3: X-rays and the Central Source
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 179 - 181
Copyright
Copyright © Kluwer 1989 

References

Mittaz, J.P.D. and Branduardi-Raymont, G. 1988, Mon. Not. R. astr. Soc., (submitted).Google Scholar
Moskalik, P. and Sikora, M. 1986, Nature, 319, 649.Google Scholar