BAT AGN Spectroscopic Survey. XVI. General Physical Characteristics of BAT Blazars

Abstract

The recently released 105-month Swift -Burst Alert Telescope (BAT) all-sky hard X-ray survey catalog presents an opportunity to study astrophysical objects detected in the deepest look at the entire hard X-ray (14–195 keV) sky. Here we report the results of a multifrequency study of 146 blazars from this catalog, quadrupling the number compared to past studies, by utilizing recent data from the Fermi -Large Area Telescope (LAT), Swift -BAT, and archival measurements. In our γ -ray analysis of ∼10 yr of the LAT data, 101 are found as γ -ray emitters, whereas, 45 remains LAT undetected. We model the broadband spectral energy distributions with a synchrotron-inverse Compton radiative model. On average, BAT detected sources host massive black holes ( M bh ∼ 10 9 M ⊙ ) and luminous accretion disks ( L d ∼ 10 46 erg s −1 ). At high redshifts ( z > 2), BAT blazars host more powerful jets with luminous accretion disks compared to those detected only with Fermi -LAT. We find good agreement in the black hole masses derived from the single-epoch optical spectroscopic measurements and standard accretion disk modeling approaches. Other physical properties of BAT blazars are similar to those known for Fermi -LAT detected objects.