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

GCN Circular 20561

Subject
GRB 170127C: AstroSat CZTI detection
Date
2017-01-28T17:45:19Z (7 years ago)
From
Vidushi Sharma at IUCAA <vidushi@iucaa.in>
V. Sharma, D. Bhattacharya and V. Bhalerao (IUCAA), 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 GRB170127C (Fermi detection: E. Bissaldi et al., GCN Circ. 20543) in the 40-200 keV energy range. The light curve shows single peak structure with main peak at 01:35:47.79 UT, coincident with Fermi trigger. The measured peak count rate is 895.2 counts/sec above the background in combined data of four quadrants, with a total 904.3 counts. The local mean background count rate was 416.8 counts/sec. Using cumulative rates, we measure a T90 of 0.91 secs.

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