{
  "bibcode": "2022GCN.32990....1D",
  "body": "M. Dixit (IITB), V. Prasad (IUCAA), G. Waratkar (IITB), A. Vibhute \n(IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), \nA. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the \nAstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., \n2021, JApA, 42, 73) showed the detection of long GRB 221126A which was \nalso detected by Fermi-GBM (GCN Cir. 32985) and Swift/BAT-GUANO (GCN \nCir. 32987).\n\nThe source was clearly detected in the 20-200 keV energy range. The \nlight curve peaks at 2022-11-26 13:07:28.950 UTC. The measured peak \ncount rate associated with the burst is 590.6 (+51.2, -55.0) counts/s \nabove the background in the combined data of all quadrants, with a total \nof 2093 (+254, -271) counts. The local mean background count rate was \n433.4 (+2.7, -3.0) counts/s. Using cumulative rates, we measure a T90 of \n4.89 (+4.45, -1.03) s.\n\nIt was also clearly detected in the CsI anticoincidence (Veto) detector \nin the 100-500 keV energy range. The light curve peaks at 2022-11-26 \n13:07:28.640 UTC. The measured peak count rate is 663.6 (+72.1, -79.1) \ncounts/s above the background in the combined Veto data of all \nquadrants, with a total of 1770 (+234, -259) counts. The local mean \nbackground count rate was 1410.0 (+4.9, -5.4) counts/s. We measure a T90 \nof 4.18 (+1.11, -1.24) s from the cumulative Veto light curve.\n\nCZTI GRB detections are reported regularly on the payload site at \nhttp://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led \nconsortium of institutes across India, including VSSC, URSC, IUCAA, SAC, \nand PRL. The Indian Space Research Organisation funded, managed, and \nfacilitated the project.",
  "circularId": 32990,
  "createdOn": 1669643907000,
  "email": "gauravwaratkar@iitb.ac.in",
  "subject": "GRB 221126A: AstroSat CZTI detection",
  "submitter": "Gaurav Waratkar at IIT,Bombay  <gauravwaratkar@iitb.ac.in>",
  "eventId": "GRB 221126A"
}