{
  "circularId": 44390,
  "body": "A. Arya (IITB), A. Goyal (IITB), M. Tembhurnikar (IUCAA), S. Salunke (IUCAA), Harsha K. H. (IUCAA), G. Waratkar (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:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long GRB 260419A  which was also detected by Fermi GBM (Fermi GBM Team, GCN Circ. 44346).\n\nThe source was 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 2026-04-19 07:10:15 UTC. The measured peak count rate associated with the burst is 32 (+19, -2) counts/s above the background in the combined data of two quadrants (out of four), with a total of 715 (+297, -356) counts. The local mean background count rate was 137 (+19, -2) counts/s. Using cumulative rates, we measure a T90 of 47 (+11, -28) s. \n\nThe source was also faintly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.\n\nCZTI 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.\n\nCZTI GRB detections are reported regularly on the payload site at:\nhttp://astrosat.iucaa.in/czti/?q=grb ",
  "submittedHow": "web",
  "createdOn": 1776850400925,
  "submitter": "Anuraag Arya at IIT Bombay <aryaanuraag910@gmail.com>",
  "format": "text/plain",
  "eventId": "GRB 260419A",
  "subject": "GRB 260419A: AstroSat CZTI detection"
}