{
  "bibcode": "2022GCN.32193....1G",
  "body": "R. Gopalakrishnan (IUCAA), V. Prasad (IUCAA), G. Waratkar (IITB), A. \nVibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka \nUniversity/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report \non behalf of the AstroSat CZTI collaboration:\n\nAnalysis of AstroSat CZTI data with the CIFT framework (Sharma et al., \n2021, JApA, 42, 73) showed the detection of a long GRB 220610B which was \nalso detected by INTEGRAL SPI-ACS (TrigNum 9952.0) and Fermi-GBM \n(TrigNum 676537486).\n\nThe source was clearly detected in the 20-200 keV energy range. The \nlight curve peaks at 2022-06-10 07:04:43.50 UTC. The measured peak count \nrate associated with the burst is 125 (+32, -20) counts/s above the \nbackground in the combined data of two quadrants (out of four), with a \ntotal of 969 (+230, -221) counts. The local mean background count rate \nwas 226 (+2, -2) counts/s. Using cumulative rates, we measure a T90 of \n20 (+7, -8) 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 2022-06-10 \n07:04:43.38 UTC. The measured peak count rate is 388 (+69, -71) counts/s \nabove the background in the combined Veto data of four quadrants, with a \ntotal of 2179 (+368, -491) counts. The local mean background count rate \nwas 1471 (+5, -5) counts/s. We measure a T90 of 13 (+5, -3) s from the \ncumulative 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": 32193,
  "createdOn": 1655006470000,
  "email": "gauravwaratkar@iitb.ac.in",
  "subject": "GRB 220610B: AstroSat CZTI detection",
  "submitter": "Gaurav Waratkar at IIT,Bombay  <gauravwaratkar@iitb.ac.in>",
  "eventId": "GRB 220610B"
}