{
  "bibcode": "2021GCN.30446....1P",
  "body": "V. Prasad (IUCAA), P. Sawant (IUCAA), G. Waratkar (IITB), A. Vibhute\n(IUCAA), V. Bhalerao (IITB), D. Bhattacharya (IUCAA), A. R. Rao\n(IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat\nCZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al,\n2020, arxiv:2011.07067) showed detection of a long GRB 210709A, which\nwas also detected by Fermi-GBM (GCN 30427).\n\nThe source was clearly detected in the 20-200 keV energy range. The\nlight curve showed multiple peaks of emission with the strongest peak at\n2021-07-09 04:49:04.5 UT. The measured peak count rate associated with\nthe burst is 201 (+40, -42) cts/s above the background in the combined\ndata of four quadrants, with a total of 909 (+221, -239) cts. The local\nmean background count rate was 386 (+4, -4) cts/s. Using cumulative\nrates, we measure a T90 of 14 (+4, -4) s. \n\nIt was also detected in the CsI anticoincidence (Veto) detector in the\n100-500 keV energy range. \n\nCZTI GRB detections are reported regularly on the payload site at\nhttp://astrosat.iucaa.in/czti/?q=grb [1]. CZTI is built by a TIFR-led\nconsortium of institutes across India, including VSSC, ISAC, IUCAA, SAC,\nand PRL. The Indian Space Research Organisation funded, managed, and\nfacilitated the project. \n\nLinks:\n------\n[1] http://astrosat.iucaa.in/czti/?q=grb",
  "circularId": 30446,
  "createdOn": 1626065097000,
  "email": "gauravwaratkar@iitb.ac.in",
  "subject": "GRB 210709A: AstroSat CZTI detection",
  "submitter": "Gaurav Waratkar at IIT,Bombay  <gauravwaratkar@iitb.ac.in>",
  "eventId": "GRB 210709A"
}