{
  "bibcode": "2021GCN.31099....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 GRB 211118A, which was also\ndetected by Swift/BAT-GUANO (Raman et al., GCN 31096).\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\n2021-11-18 23:38:13.65 UT. The measured peak count rate associated with\nthe burst is 915 (+217, -92) cts/s above the background in the combined\ndata of two quadrants, with a total of 806 (+94, -109) cts. The local\nmean background count rate was 446 (+7, -8) cts/s. Using cumulative\nrates, we measure a T90 of 2.2 (+0.6, -0.4) 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\n  \n\nLinks:\n------\n[1] http://astrosat.iucaa.in/czti/?q=grb",
  "circularId": 31099,
  "createdOn": 1637432496000,
  "email": "gauravwaratkar@iitb.ac.in",
  "subject": "GRB 211118A: AstroSat CZTI detection",
  "submitter": "Gaurav Waratkar at IIT,Bombay  <gauravwaratkar@iitb.ac.in>",
  "eventId": "GRB 211118A"
}