The BeppoSAX program on X-ray weak Seyfert 2 galaxies

Details The BeppoSAX program on X-ray weak Seyfert 2 galaxies The BeppoSAX program on X-ray weak Seyfert 2 galaxies

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..69..537s&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 69, Issue 1-3, p. 537-541.

Physics

Nuclear Physics

Scientific paper

We present a progress report on the Core Program project dealing with X-ray weak Seyfert 2 galaxies. The aim of the project is to increase the sample of Seyfert 2 galaxies with measured hard X-ray spectra, by adding progressively weaker objects within a well-defined optical sample. The hard X-ray information, together with the [OIII] and IR fluxes, the orientation of the host galaxy and the geometry of the ionization cone, should give the distribution of the absorbing column NH, and assess the reliability of various proposed ``isotropic'' indicators of the luminosity. We have up to now a 100% detection rate, and find systematically low (X/[OIII]), high NH, and high Fe EW. While the first finding is due to our attempt of removing pre-existing biases, the remaining two support strongly the unified scenario, and point to a fraction of X-ray thick sources higher than usually assumed.

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