The complex and variable absorption of NGC 3516 observed by BeppoSAX

Details The complex and variable absorption of NGC 3516 observed by BeppoSAX The complex and variable absorption of NGC 3516 observed by BeppoSAX

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..590c&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

Active And Peculiar Galaxies And Related Systems, X-Ray Sources, X-Ray Bursts, Galactic Nuclei, Circumnuclear Matter, And Bulges

Scientific paper

We present 2 BeppoSAX (0.1-150 keV) observations of the Seyfert 1 galaxy NGC 3516, taken 4 months apart (8-11-1996, 12-03-1997). We find that during the 1996 observation the nuclear X-ray continuum was absorbed by an unusually large amount of cold gas clearly associated with the AGN environment. Unabsorbed thermal emission is also seen below 3 keV during this observation. Finally, the 0.1-10 keV spectra of both the observations show the presence of a complex system of ionized absorbing matter which we parameterize with two ``warm absorber'' with quite different degrees of ionization and column densities. .

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