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 N-H, 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 N-H, 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.

Salvati, M., Maiolino, R., Bassani, L., Dadina, M., Della Ceca, R., Matt, G., et al. (1999). The BeppoSAX program on X-ray weak Seyfert 2 galaxies. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 69(1-3), 537-541 [10.1016/S0920-5632(98)00279-5].

The BeppoSAX program on X-ray weak Seyfert 2 galaxies

MATT, Giorgio;
1999-01-01

Abstract

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 N-H, 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 N-H, 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.
1999
Salvati, M., Maiolino, R., Bassani, L., Dadina, M., Della Ceca, R., Matt, G., et al. (1999). The BeppoSAX program on X-ray weak Seyfert 2 galaxies. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 69(1-3), 537-541 [10.1016/S0920-5632(98)00279-5].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/147360
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