XMM-Newton observations of Seyfert galaxies from the Palomar spectroscopic survey: the X-ray absorption distribution

摘要: We present XMM-Newton spectral analysis of all 38 Seyfert galaxies from the Palomar spectroscopic sample galaxies. These are found at distances up to 67 Mpc and cover absorbed 2-10 keV luminosity range ~10^38-10^43 ergs/s. Our aim is determine distribution X-ray absorption in local Universe. Three these Compton-thick with column densities just above 10^24 cm^-2 high equivalent width FeKa lines (>700 eV). Five more sources have low values [OIII] flux ratio suggesting that they could be associated obscured nuclei. Their individual spectra show neither absorbing columns nor flat indices. However, their stacked spectrum reveals an density N_H~10^23 cm^-2. Therefore fraction (>10^22 as 55+/-12%. A number Seyfert-2 appear host unabsorbed low-luminosity Lx 10^{41}$ \lunits, 21 sources, we find nuclei rises $75\pm19 $ % while 15-20%. The AGN lower than predicted by background synthesis model same redshift range.}