{
  "bibcode": "2021GCN.31104....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.,\n2021, JApA, 42, 73) showed detection of a long GRB 211120A, which was\nalso detected by GECAM (Li et al., GCN 31100).\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\n2021-11-20 23:05:22.85 UT. The measured peak count rate associated with\nthe burst is 1756 (+251, -174) cts/s above the background in the\ncombined data of two quadrants, with a total of 2263 (+183, -134) cts.\nThe local mean background count rate was 443 (+4, -8) cts/s. Using\ncumulative rates, we measure a T90 of 4.8 (+0.6, -0.2) s.\n\nIt was also clearly detected in the CsI anticoincidence (Veto) detector\nin the 100-500 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": 31104,
  "createdOn": 1637646740000,
  "email": "gauravwaratkar@iitb.ac.in",
  "subject": "GRB 211120A: AstroSat CZTI detection",
  "submitter": "Gaurav Waratkar at IIT,Bombay  <gauravwaratkar@iitb.ac.in>",
  "eventId": "GRB 211120A"
}