THE 70 MONTH <i>SWIFT</i> -BAT ALL-SKY HARD X-RAY SURVEY

Abstract

We present the catalog of sources detected in 70 months of observations of\nthe BAT hard X-ray detector on the Swift gamma-ray burst observatory. The\nSwift-BAT 70 month survey has detected 1171 hard X-ray sources (more than twice\nas many sources as the previous 22 month survey) in the 14-195 keV band down to\na significance level of 4.8 sigma, associated with 1210 counterparts. The 70\nmonth Swift-BAT survey is the most sensitive and uniform hard X-ray all-sky\nsurvey and reaches a flux level of 1.03e-11 ergs/sec/cm2 over 50% of the sky\nand 1.34e-11 ergs/sec/cm2 over 90% of the sky. The majority of new sources in\nthe 70 month survey continue to be AGN, with over 700 in the 70 month survey\ncatalog.\n As part of this new edition of the Swift-BAT catalog, we also make available\n8-channel spectra and monthly-sampled lightcurves for each object detected in\nthe survey at the Swift-BAT 70 month website.\n