GCN Circular 27313

H. M. Antia, Tilak Katoch, Parag Shah, Dhiraj Dedhia (TIFR),
S. Gupta, R. Gaikwad, V. Sharma, A. Vibhute and D. Bhattacharya (IUCAA) 
on
behalf of the AstroSat LAXPC and CZTI collaboration report:

Analysis of AstroSat LAXPC and CZTI data showed the detection of a long 
GRB 2002010A.

The source was clearly detected in the 3-400 keV energy range. The light 
curve showed
multiple peaks of emission with the strongest peak at 2020-02-10 
08:03:40.00 UT. The
measured peak count rate above the background associated with the burst 
is 354 +/- 29 cts/s
in LAXPC10 and 197 +/- 21 in LAXPC20, with a total of 5524 +/- 143 cts 
in LAXPC10 and
3384 +/- 99 in LAXPC20. LAXPC20 has a nominal energy range of 3-100 keV 
but due to lower
gain in LAXPC10 the energy range is about 30-400 keV. The background 
subtracted light curve
with 1 sec time-bin in LAXPC detectors is available at the web-site:

  https://www.tifr.res.in/~astrosat_laxpc/grb200210lc.jpg

The measured peak count rate associated with the burst in CZTI is 288 
+/- 29 cts/s above
the background in the combined data of four quadrants, with a total of 
6338 +/- 67 cts.
The local mean background count rate was 533 +/- 15 cts/s. Using 
cumulative rates, we
measure a T90 of 29.2 +/- 0.01 s. CZTI operates in the energy range of 
40-200 keV. It was
also clearly detected in the CsI anticoincidence (Veto) detector in the 
100-500 keV energy
range.

CZTI GRB detections are reported regularly on the payload site at
http://astrosat.iucaa.in/czti/?q=grb.

LAXPC is built by TIFR in collaboration with the Indian Space Research 
Organisation.
CZTI is built by a TIFR-led consortium of institutes across India, 
including VSSC, ISAC,
IUCAA, SAC and PRL. The Indian Space Research Organisation funded, 
managed and
facilitated the project.