Design and Fabrication of Detector Module for UFFO Burst Alert & Trigger   Telescope
  The Ultra-Fast Flash Observatory (UFFO) pathfinder is a space mission devoted to the measurement of Gamma-Ray Bursts (GRBs), especially their early light curves which will give crucial information on the progenitor stars and central engines of the GRBs. It consists of two instruments: the UFFO Burst Alert & Trigger telescope (UBAT) for the detection of GRB locations and the Slewing Mirror Telescope (SMT) for the UV/optical afterglow observations, upon triggering by UBAT. The UBAT employs a coded-mask {\gamma}/X-ray camera with a wide field of view (FOV), and is comprised of three parts: a coded mask, a hopper, and a detector module (DM). The UBAT DM consists of a LYSO scintillator crystal array, multi-anode photo multipliers, and analog and digital readout electronics. We present here the design and fabrication of the UBAT DM, as well as its preliminary test results. 
A. Jung, S. Ahmad, K.-B. Ahn, P. Barrillon, S. Blin-Bondil, S. Brandt,   C. Budtz-J{\O}Rgensen, A.J. CaStro-Tirado, P. Chen,...
astro-ph.CO