Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 24870

Subject
GRB 190615B: AstroSat CZTI detection
Date
2019-06-21T10:43:59Z (5 years ago)
From
Prachee Ghumatkar at IUCAA/AstroSat <prachee@iucaa.in>
P. Ghumatkar, 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 190615B, which was also detected by Insight-HXMT/HE (Luo Q. et al., GCN #24843).

The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with the strongest peak at 14:42:23.5 UT. The measured peak count rate associated with the burst is 946 cts/s above the background in the combined data of four quadrants, with a total of 4318 cts. The local mean background count rate was 640 cts/s. Using cumulative rates, we measure a T90 of 27.9 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