TITLE:   GCN CIRCULAR
NUMBER:  19949
SUBJECT: GRB160910A: AstroSat CZTI detection
DATE:    16/09/27 16:12:44 GMT
FROM:    Varun Bhalerao at IUCAA  <varunb@iucaa.in>

V. Bhalerao (IUCAA), V. Kumar (IUCAA), D. Bhattacharya (IUCAA), A. R. Rao (TIFR), S. Vadawale (PRL) report on behalf of the Astrosat CZTI collaboration:

Analysis of Astrosat data showed the CZTI detection of a very bright GRB160910A (Fermi-GBM detection: P. Veres et al., GCN Circ. 19901).

The source was clearly detected in the 40-200 keV energy range. The light curve shows a single peak at 17:19:47.15 UT, 8 seconds after Fermi Trigger at 17:19:39.15 UT and a peak count rate of 1738 counts/sec above the background (four quadrants summed together), with a total of 7184 counts. The local mean background count rate was 343 counts/sec. Using cumulative rates, we measure a T90 of 9.44 secs.

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.