Design and implementation of the UFFO burst alert and trigger telescope

J. E. Kim, S. Ahmad, P. Barrillon, S. Brandt, C. Budtz-Jorgensen, A. J. Castro-Tirado, P. Chen, Y. J. Choi, P. Connell, S. Dagoret-Campagne, C. Eyles, B. Grossan, M. H.A. Huang, A. Jung, S. Jeong, M. B. Kim, S. W. Kim, Y. W. Kim, A. S. Krasnov, J. LeeH. Lim, E. V. Linder, T. C. Liu, N. Lund, K. W. Min, G. W. Na, J. W. Nam, M. I. Panasyu, I. H. Park, J. Ripa, V. Reglero, J. M. Rodrigo, G. F. Smoot, J. E. Suh, S. Svertilov, N. Vedenkin, M. Z. Wang, I. Yashin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


The Ultra Fast Flash Observatory pathfinder (UFFO-p) is a telescope system designed for the detection of the prompt optical/UV photons from Gamma-Ray Bursts (GRBs), and it will be launched onboard the Lomonosov spacecraft in 2012. The UFFO-p consists of two instruments: the UFFO Burst Alert&Trigger telescope (UBAT) for the detection and location of GRBs, and the Slewing Mirror Telescope (SMT) for measurement of the UV/optical afterglow. The UBAT is a coded-mask aperture X-ray camera with a wide field of view (FOV) of 1.8 sr. The detector module consists of the YSO (Yttrium Oxyorthosilicate) scintillator crystal array, a grid of 36 multi-Anode photomultipliers (MAPMTs), and analog and digital readout electronics. When the γ/X-ray photons hit the YSO scintillator crystal array, it produces UV photons by scintillation in proportion to the energy of the incident γ/X-ray photons. The UBAT detects X-ray source of GRB in the 5 ̃ 100 keV energy range, localizes the GRB within 10 arcmin, and sends the SMT this information as well as drift correction in real time. All the process is controlled by a Field Programmable Gates Arrays (FPGA) to reduce the processing time. We are in the final stages of the development and expect to deliver the instrument for the integration with the spacecraft. In what follows we present the design, fabrication and performance test of the UBAT.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2012
Subtitle of host publicationUltraviolet to Gamma Ray
Publication statusPublished - 2012
EventSpace Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray - Amsterdam, Netherlands
Duration: 2012 Jul 12012 Jul 6

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherSpace Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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