GRB 230217A: AstroSat CZTI detection
Abstract
Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a short GRB230217A which was also detected by Fermi-GBM (Fermi GBM team, GCN Circ. 33338), Swift-BAT (Moss et al., GCN Circ. 33339), AGILE/MCAL (Casentini et al., GCN Circ. 33343), Swift-XRT (Capalbi et al., GCN Circ. 33348) and Konus-Wind (Svinkin et al., GCN Circ. 33349). The source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-02-17 21:53:10.9 UTC. The measured peak count rate associated with the burst is 6691 (+436, -444) counts/s above the background in the combined data of all quadrants, with a total of 3487 (+142, -172) counts. The local mean background count rate was 454 (+9, -10) counts/s. Using cumulative rates, we measure a T90 of 0.77 (+0.19, -0.07) s. It was also 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, URSC, 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:
- February 2023
- Bibcode:
- 2023GCN.33361....1N