GRB 201216C: AstroSat CZTI detection
Abstract
Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al, 2020, arxiv:2011.07067) showed detection of a bright long GRB 201216C, which was also detected by Swift BAT (GCN #29061) and Fermi GBM (GCN #29063). The source was clearly detected in the 20-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-12-16 23:07:47.500 UT. The measured peak count rate associated with the burst is 1160 (+72, -40) cts/s above the background in the combined data of four quadrants, with a total of 18073 (+682, -728) cts. The local mean background count rate was 652 (+4, -4) cts/s. Using cumulative rates, we measure a T90 of 29 (+2, -2) s. It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-12-16 23:07:47.247 UT. The measured peak count rate is 1679 (+106, -78) cts/s above the background in the combined Veto data of four quadrants, with a total of 22904 (+1443 -1654) cts. The local mean background count rate was 2400 (+7, -8) cts/s. We measure a T90 of 26 (+4, -2) s from the cumulative Veto light curve. 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.
- Publication:
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GRB Coordinates Network
- Pub Date:
- December 2020
- Bibcode:
- 2020GCN.29074....1N