[38.02] Comparison of the Swift BAT Hard X-ray Survey AGN with Optical and X-ray AGN Surveys

AAS 207th Meeting, 8-12 January 2006
Session 38 The X-ray and Infrared Backgrounds, AGN Evolution
Oral, Monday, 10:00-11:30am, January 9, 2006, Delaware A

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[38.02] Comparison of the Swift BAT Hard X-ray Survey AGN with Optical and X-ray AGN Surveys

J. Tueller, L. Barbier, S.D. Barthelmy (GSFC), D. Burrows (PSU), J. Cummings (GSFC/NRC), A. Falcone (PSU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD), J. Kennea (PSU), H. Krimm (GSFC/USRA), C. Markwardt (UMD), R. Mushotsky (GSFC), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), R. Sambruna (GSFC), G. Sato (ISAS), G. Skinner (CNRS), Swift Survey Team

The Swift BAT hard x-ray (14-200 keV) survey is the first complete catalog of hard x-ray detected AGN. At 9.5 months, the survey is compete (90% of the sky) to a sensitivity of <2 milliCrab. The observed time dependence of the sensitivity (t^1/2) extends to exposures >2 \times 10⁶ s and we expect this time dependence to continue at longer exposures. At these energies, N_H > ~10²⁴ is required to significantly reduce the BAT flux. We have a high confidence in our identifications. The expectation value of a false detection on the whole sky is <1 (bootstrapped from local image variances). The Swift XRT telescope is used to identify BAT survey sources that cannot be identified from catalog searches and to directly measure N_H for sources without x-ray previous spectra. We will present x-ray measurements for some of the AGN identified by Swift. The distribution of N_H for Swift BAT will be presented by Markwardt et al in this conference. We will present the distributions of L_opt/L_BAT and L_x/L_BAT for the BAT detected AGN. This is a critical test of the completeness of AGN surveys at other wavelengths. These surveys are the basis for understanding the evolution of AGN and the origin of the cosmic x-ray background.

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