Swift Burst Alert Telescope Hard X-Ray Monitor and Survey

Tueller J.$^1$, Barthelmy S.$^1$, Fenimore E.$^2$, Gehrels N$^1$.,\newline 
Krimm H.$^3$, Palmer D.$^2$, and Parsons A.$^1$
 

$^1$NASA/GSFC, Greenbelt, MD, USA\newline
$^2$LANL, Los Alamos, NM, USA\newline
$^3$USRA/GSFC, Greenbelt, MD, USA

The Burst Alert Telescope on the Swift gamma ray burst mission will
perform the first new all sky hard X-ray survey since 1977.  BAT is 
a coded aperture instrument with 17 arcminute pixels and a 2 ster
partially coded FOV.  The imaging array has 32768, 4mm CdZnTe 
detectors with an area of 5243 cm^2.  Swift will perform pointings 
covering >64\% of the sky each day and achieve a integrated 
sensitivity in three years of 0.6 milliCrabs for sources well off 
the Galactic plane.  This survey is expected to identify 100s of
new highly obscured AGN.