TITLE: GCN CIRCULAR NUMBER: 43686 SUBJECT: GRB 260210A: AstroSat CZTI detection DATE: 26/02/10 17:17:11 GMT FROM: Gaurav Waratkar at Caltech <gauravwaratkar@iitb.ac.in> A. Arya (IITB), A. Goyal (IITB), M. Tembhurnikar (IUCAA), S. Salunke (IUCAA), Harsha K. H. (IUCAA), G. Waratkar (Caltech/IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long GRB 260210A which was also detected by SVOM/GRM (via GCN notices), and KONUS-Wind (via IPN notices). The source was 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 2026-02-10 11:27:38.52 UTC. The measured peak count rate associated with the burst is 292 (+76, -33) counts/s above the background in the combined data of all quadrants, with a total of 3215 (+487, -705) counts. The local mean background count rate was 1390 (+5, -5) counts/s. We measure a T90 of 34 (+2, -9) s from the cumulative Veto light curve. 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. CZTI GRB detections are reported regularly on the payload site at: http://astrosat.iucaa.in/czti/?q=grb View this GCN Circular online at https://gcn.nasa.gov/circulars/43686. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...