Skip to main content
New Swift-BAT/GUANO and IceCube Notice Types Available! See news and announcements

GCN Circular 21348

Subject
GRB 170702A: AstroSat CZTI detection
Date
2017-07-15T20:38:55Z (6 years ago)
From
Vidushi Sharma at IUCAA <vidushi@iucaa.in>
V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IITB), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:

Analysis of AstroSat CZTI data showed clear detection of GRB 170702A (CALET Gamma-Ray Burst Monitor detection: Ozawa S. et al, GCN Circ. 21334) in the 40-200 keV energy range. The light curve shows multiple peaks of emission with the strongest peak at 23:41:36.0 UT, around ~2 s after the CALET trigger. The measured peak count rate is 1192.5 counts/s above the background in combined data of four quadrants, with a total 3911 counts. The local mean background count rate was 334.5 counts/s. Using cumulative rates, we measure a T90 of 8.7 s.

It was clearly detected in the CsI anticoincidence detector (Veto) also as bright detection 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