GRB 200629A: AstroSat CZTI detection
Abstract
Analysis of AstroSat CZTI data showed the detection of a long GRB 200629A, which was also detected by BALROG (Biltzinger B. et al., GCN #28039), Fermi GBM (GCN #28040) and Global MASTER-Net (Lipunov V. et al., GCN # 28041). The source was clearly detected in the 40-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-06-29 12:49:53.599 UT. The measured peak count rate associated with the burst is 337 +/- 28 cts/s above the background in the combined data of four quadrants, with a total of 3117 +/- 32 cts. The local mean background count rate was 486 +/- 1 cts/s. Using cumulative rates, we measure a T90 of 27.14 +/- 0.12 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 2020-06-29 12:49:52.574 UT. The measured peak count rate is 310 +/- 33 cts/s above the background in the combined Veto data of four quadrants, with a total of 2105 +/- 42 cts. The local mean background count rate was 1414 +/- 1 cts/s. We measure a T90 of 21.01 +/- 0.20 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:
- June 2020
- Bibcode:
- 2020GCN.28045....1G