GCN Circular 23191
Subject
GRB 180828A: AstroSat CZTI detection
Date
2018-08-29T21:32:04Z (6 years ago)
From
Vidushi Sharma at IUCAA <vidushi@iucaa.in>
T. Khanam, 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 180828A, which was also detected by Swift (Beardmore A. P. et al., GCN 23182) and Fermi-GBM (Roberts O. J. et al., GCN 23183).
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple peaks of emission with strongest peak at 18:57:35.500 UT. The measured peak count rate is 947 cts/s above the background in combined data of four quadrants, with a total of 3607 cts. The local mean background count rate was 557 cts/s. Using cumulative rates, we measure a T90 of 8.9 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.