The Swift/BAT Hard X-ray Transient Monitor

The Swift/Burst Alert Telescope (BAT) hard X-ray transient monitor provides near real-time coverage of the X-ray sky in the energy range 15−50 keV. The BAT observes 88% of the sky each day with a detection sensitivity of 5.3 mCrab for a Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA Universities Space Research Association, 10211 Wincopin Circle, Suite 500, Columbia, MD 21044, USA Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA Department of Physics and Center for Space Sciences and Technology, University of Maryland Baltimore County, Baltimore, MD 21250, USA Department of Applied Physics, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 USA INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Via U. La Malfa 153, I-90146 Palermo, Italy Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 USA Department of Astronomy, University of California, Berkeley, Berkeley CA, 94720-3411, USA NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA NASA Postdoctoral Program Fellow, Goddard Space Flight Center, Greenbelt, MD 20771, USA Los Alamos National Laboratory, B244, Los Alamos, NM, 87545, USA Department of Physics and Mathematics, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara-shi, Kanagawa 252-5258, Japan Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA