[vsnet-grb-info 21943] GRB 190326B: AstroSat CZTI detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Apr 3 02:14:23 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 24042
SUBJECT: GRB 190326B: AstroSat CZTI detection
DATE: 19/04/02 17:13:12 GMT
FROM: Vidushi Sharma at IUCAA <vidushi at iucaa.in>
V. Sharma, D. Bhattacharya, A. Vibhute and T. Khanam (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed the detection of a long bright GRB 190326B, which was also detected by Fermi-GBM (Kienlin A. von et al., GCN # 24013) and Insight-HXMT/HE detection (Luo Q. et al., GCN # 24019).
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with strongest peak at 07:32:36.5 UT. The measured peak count rate associated with the burst is 418 cts/s above the background in the combined data of four quadrants, with a total of 4932 cts. The local mean background count rate was 630 cts/s. Using cumulative rates, we measure a T90 of 54.3 s.
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. 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.
More information about the vsnet-grb-info
mailing list