GRB 190315A, GRB 190315
GCN Circular 23972
Subject
GRB 190315A: AstroSat CZTI detection
Date
2019-03-19T12:17:15Z (7 years ago)
From
Vidushi Sharma at IUCAA <vidushi@iucaa.in>
V. Sharma, P. Ghumatkar, D. Bhattacharya, T. Khanam and A. Vibhute (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 190315A, which was also detected by Fermi/GBM (Kunzweiler F. et al., GCN # 23969).
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with strongest peak at 12:17:52.500 UT. The measured peak count rate associated with the burst is 296 cts/s above the background in the combined data of four quadrants, with a total of 4402 cts. The local mean background count rate was 592 cts/s. Using cumulative rates, we measure a T90 of 31 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.
GCN Circular 23969
Subject
Fermi Trigger 574345067 / GRB 190315512: BALROG localization
Date
2019-03-15T12:40:21Z (7 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
574345067 at 12:17:42 on 15 March 2019 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ (in press; arXiv:1902.01082)).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 146.0+/-1.9 deg
Decl.(2000.0) = -13.8+/-2.5 deg
We estimate an additional systematic error of 0 deg.
Further details and a Healpix map are available at
https://grb.mpe.mpg.de/grb/GRB190315512/