UBAT of UFFO/Lomonosov: The X-Ray Space Telescope to Observe Early Photons from Gamma-Ray Bursts

DOI: 
10.1007/s11214-017-0454-5
Publication date: 
08/01/2018
Main author: 
Jeong S.
IAA authors: 
Jeong, S.;Castro-Tirado, A.J.
Authors: 
Jeong S., Panasyuk M.I., Reglero V., Connell P., Kim M.B., Lee J., Rodrigo J.M., Ripa J., Eyles C., Lim H., Gaikov G., Jeong H., Leonov V., Chen P., Castro-Tirado A.J., Nam J.W., Svertilov S., Yashin I., Garipov G., Huang M.-H.A., Huang J.-J., Kim J.E., Liu T.-C., Petrov V., Bogomolov V., Budtz-Jørgensen C., Brandt S., Park I.H.
Journal: 
Space Science Reviews
Refereed: 
Yes
Publication type: 
Article
Volume: 
214
Pages: 
16
Number: 
16
Abstract: 
The Ultra-Fast Flash Observatory (UFFO) Burst Alert and Trigger Telescope (UBAT) has been designed and built for the localization of transient X-ray sources such as Gamma Ray Bursts (GRBs). As one of main instruments in the UFFO payload onboard the Lomonosov satellite (hereafter UFFO/Lomonosov), the UBAT’s roles are to monitor the X-ray sky, to rapidly locate and track transient sources, and to trigger the slewing of a UV/optical telescope, namely Slewing Mirror Telescope (SMT). The SMT, a pioneering application of rapid slewing mirror technology has a line of sight parallel to the UBAT, allowing us to measure the early UV/optical GRB counterpart and study the extremely early moments of GRB evolution. To detect X-rays, the UBAT utilizes a 191.1 cm2 scintillation detector composed of Yttrium Oxyorthosilicate (YSO) crystals, Multi-Anode Photomultiplier Tubes (MAPMTs), and associated electronics. To estimate a direction vector of a GRB source in its field of view, it employs the well-known coded aperture mask technique. All functions are written for implementation on a field programmable gate array to enable fast triggering and to run the device’s imaging algorithms. The UFFO/Lomonosov satellite was launched on April 28, 2016, and is now collecting GRB observation data. In this study, we describe the UBAT’s design, fabrication, integration, and performance as a GRB X-ray trigger and localization telescope, both on the ground and in space. © 2017, The Author(s).
Database: 
SCOPUS
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2018SSRv..214...16J/abstract
ADS Bibcode: 
2018SSRv..214...16J
Keywords: 
Coded mask; Gamma Ray Burst; Lomonosov; UFFO; YSO