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

GCN Circular 27642

Subject
GRB 200424A: AstroSat CZTI detection
Date
2020-04-25T11:54:17Z (4 years ago)
From
Soumya Gupta at IUCAA/ASTROSAT <soumya@iucaa>
S. Gupta, 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 200424A, which was also detected by  INTEGRAL (Mereghetti S. et al., GCN #27634), Swift(Evans P. et al., GCN #27636) and  LCO (Strausbaugh R. et al., GCN #27637).

The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple peaks of emission with the strongest peak at 2020-04-24 12:07:18.525 UT. The measured peak count rate associated with the burst is 232 +/- 28 cts/s above the background in the combined data of four quadrants, with a total of 1849 +/- 44 cts. The local mean background count rate was 596 +/- 1 cts/s. Using cumulative rates, we measure a T90 of 43.3 +/- 0.02 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 http://astrosat.iucaa.in/czti/?q=grb. 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 USA.gov