TITLE: GCN CIRCULAR NUMBER: 43685 SUBJECT: GRB 260208C: AstroSat CZTI detection DATE: 26/02/10 17:14:45 GMT FROM: Gaurav Waratkar at Caltech <gauravwaratkar@iitb.ac.in> M. Tembhurnikar (IUCAA), Harsha K. H. (IUCAA), S. Salunke (IUCAA), A. Arya (IITB), A. Goyal (IITB), 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 260208C which was also detected by Fermi/GBM (Fermi GBM Team, GCN Circ. 43646) and SVOM/GRM (Yue Wang, GCN Circ. 43679). The source was clearly detected in the CZT detectors in the 20-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2026-02-08 15:12:17.5 UTC. The measured peak count rate associated with the burst is 99 (+40, -11) counts/s above the background in the combined data of all quadrants, with a total of 577 (+174, -169) counts. The local mean background count rate was 283 (+3, -4) counts/s. Using cumulative rates, we measure a T90 of 13 (+1, -8) s. 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/43685. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...