SIMBAD references

We present the results of the analysis of the first 9 months of data of the Swift BAT survey of AGNs in the 14-195 keV band. Using archival X-ray data or follow-up Swift XRT observations, we have identified 129 (103 AGNs) of 130 objects detected at|b|>15° and with significance >4.8 σ. One source remains unidentified. These same X-ray data have allowed measurement of the X-ray properties of the objects. We fit a power law to the logN-logS distribution, and find the slope to be 1.42±0.14. Characterizing the differential luminosity function data as a broken power law, we find a break luminosity logL_*(erg/s) = 43.85±0.26, a low-luminosity power law slope a=0.84^+0.16_–0.22, and a high-luminosity power law slope b=2.55^+0.43_–0.30, similar to the values that have been reported based on INTEGRAL data. We obtain a mean photon index 1.98 in the 14-195 keV band, with an rms spread of 0.27. Integration of our luminosity function gives a local volume density of AGNs above 10⁴¹ erg/s of 2.4x10^–3/Mpc3, which is about 10% of the total luminous local galaxy density above M_*=-19.75. We have obtained X-ray spectra from the literature and from Swift XRT follow-up observations. These show that the distribution of logn_H is essentially flat from n_H=10²⁰ to 10²⁴/cm2, with 50% of the objects having column densities of less than 10²²/cm2. BAT Seyfert galaxies have a median redshift of 0.03, a maximum log luminosity of 45.1, and approximately half have logn_H>22.