Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 23438

GRB 181119A: AstroSat CZTI detection
2018-11-23T20:27:47Z (6 years ago)
Vidushi Sharma at IUCAA <>
V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:

Analysis of AstroSat CZTI data showed the detection of a long GRB 181119A, which was also detected by Insight-HXMT/HE detection (Yi Q. B. et al., GCN 23430).

The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple peaks of emission with strongest peak at 14:32:27.500 UT. The measured peak count rate is 350 cts/s above the background in combined data of four quadrants, with a total of 1971 cts. The local mean background count rate was 488 cts/s. Using cumulative rates, we measure a T90 of 19.6 s.

It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.

CZTI GRB detections are reported regularly on the payload site at CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
Looking for U.S. government information and services? Visit