//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 23988 SUBJECT: Fermi Trigger 575018216 / GRB 190323303: BALROG localization DATE: 19/03/23 07:45:50 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 575018216 at 07:16:51 on 23 March 2019 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position (1 sigma statistical errors) is: RA(2000.0) = 138.6+/-2.9 deg Decl.(2000.0) = 2.6+/-3.3 deg We estimate an additional systematic error of 2 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB190323303/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB190323303/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB190323303/json //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 23990 SUBJECT: Fermi Trigger 575067924 / GRB 190323879: BALROG localization DATE: 19/03/23 21:28:15 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 575067924 at 21:05:19 on 23 March 2019 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position (1 sigma statistical errors) is: RA(2000.0) = 36.6+/-0.5 deg Decl.(2000.0) = 3.0+/-0.8 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB190323879/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB190323879/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB190323879/json //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 23991 SUBJECT: SWIFT GRB190323.85 Global MASTER-Net observations report DATE: 19/03/23 21:41:30 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to the SWIFT GRB190323.85 ( 2h 40m 36.72s , +61d 14m 45.60s, R=0.05) 41 sec after trigger time at 2019-03-23 20:31:28 UT, with upper limit up to 18.5 mag. The observations began at zenit distance = 57 deg. The sun altitude is -17.5 deg. MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB190323.85 68 sec after trigger time at 2019-03-23 20:31:55 UT, with upper limit up to 16.7 mag. The observations began at zenit distance = 67 deg. The sun altitude is -23.2 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 46 | MASTER-IAC | P- | 10 | 16.4 | 46 | MASTER-IAC | P| | 10 | 16.8 | 74 | MASTER-Tunka | C | 10 | 12.3 | 101 | MASTER-IAC | P- | 20 | 17.0 | 101 | MASTER-IAC | P| | 20 | 17.3 | 138 | MASTER-IAC | P- | 20 | 17.0 | 138 | MASTER-IAC | P| | 20 | 17.3 | 180 | MASTER-IAC | P- | 30 | 17.2 | 180 | MASTER-IAC | P| | 30 | 17.6 | 233 | MASTER-IAC | P- | 40 | 17.4 | 233 | MASTER-IAC | P| | 40 | 17.9 | 293 | MASTER-IAC | P- | 50 | 17.7 | 293 | MASTER-IAC | P| | 50 | 18.0 | 368 | MASTER-IAC | P| | 70 | 18.2 | 368 | MASTER-IAC | P- | 70 | 17.8 | 411 | MASTER-Tunka | P| | 70 | 16.4 | 458 | MASTER-IAC | P- | 80 | 18.0 | 458 | MASTER-IAC | P| | 80 | 18.4 | 563 | MASTER-IAC | P- | 100 | 18.0 | 563 | MASTER-IAC | P| | 100 | 18.5 | 567 | MASTER-Tunka | P| | 100 | 16.5 | 1239 | MASTER-Tunka | P| | 180 | 15.5 | 1489 | MASTER-Tunka | P| | 180 | 15.1 | 2272 | MASTER-Tunka | P| | 180 | 16.4 | 2524 | MASTER-Tunka | P| | 180 | 16.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24005 SUBJECT: GRB 190323A: Insight-HXMT/HE detection DATE: 19/03/25 12:13:39 GMT FROM: Qi Luo at IHEP Q. Luo, C. K. Li, X. B. Li, G. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, X. F. Lu, A. M. Zhang, Y. F. Zhang, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: At 2019-03-23T21:05:24.000 (T0), the Insight-HXMT/HE detected GRB 190323A(trigger ID: HEB190323878) in a routine search of the data, which was also triggered by Fermi/GBM(F. Kunzweiler et al. ,GCN 23990). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 42.40 s measured from T0-5.50 s. The 1-ms peak rate, measured from T0-0.190 s, is 938 cnts/sec. The total counts from this burst is 13490 counts. URL_LC: http://www.hxmt.org/images/GRB/HEB190323878_lc.jpg All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (record energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was fundedjointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24025 SUBJECT: GRB 190323A: AstroSat CZTI detection DATE: 19/03/30 11:48:56 GMT FROM: Vidushi Sharma at IUCAA V. Sharma, D. Bhattacharya, A. Vibhute and T. Khanam (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 190323A, which was also detected by Insight-HXMT/HE (Luo Q. et al., GCN # 24005). The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with strongest peak at 21:05:40.500 UT. The measured peak count rate associated with the burst is 153 cts/s above the background in the combined data of four quadrants, with a total of 1848 cts. The local mean background count rate was 533 cts/s. Using cumulative rates, we measure a T90 of 36.6 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.