GCN Circular 34138
Subject
GRB 230701B: AstroSat CZTI detection
Date
2023-07-03T09:14:09Z (2 years ago)
From
Gaurav Waratkar at IIT Bombay <gauravwaratkar@iitb.ac.in>
P K. Navaneeth (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long GRB 230701B which was also detected by Fermi (Trig. 709864601).
The source was clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2023-07-01 00:36:40.91 UTC. The measured peak count rate associated with the burst is 259 (+71, -40) counts/s above the background in the combined data of all quadrants, with a total of 2144 (+493, -544) counts. The local mean background count rate was 1470 (+5, -5) counts/s. We measure a T90 of 27 (+1, -7) s from the cumulative Veto light curve.
CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.
CZTI GRB detections are reported regularly on the payload site at:
http://astrosat.iucaa.in/czti/?q=grb