//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 23969 SUBJECT: Fermi Trigger 574345067 / GRB 190315512: BALROG localization DATE: 19/03/15 12:40:21 GMT FROM: Jochen Greiner at MPE,Garching 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/ //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 23972 SUBJECT: GRB 190315A: AstroSat CZTI detection DATE: 19/03/19 12:17:15 GMT FROM: Vidushi Sharma at IUCAA 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.