//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27985 SUBJECT: GRB 200619A: Insight-HXMT/HE detection DATE: 20/06/19 11:52:34 GMT FROM: Shuo Xiao at IHEP S. Xiao, Y. G. Zheng, C. Cai, Y. F. Du, W. C. Xue, Q. Luo, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong,C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, 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 2020-06-19T02:36:11.60 (T0), Insight-HXMT/HE detected GRB 200619A (trigger ID: HEB200619108) in a routine search of the data, which also triggered Fermi/GBM and INTEGRAL (EXB 200619108). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 18.49 s measured from T0+0.35 s. The 1-ms peak rate, measured from T0-0.04 s, is 2889 cnts/sec. The total counts from this burst is 14248 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB200619108_lc.jpg All measurements above are made with the CsI detectors operating in the normal mode with the energy range of about 80-800 keV (deposited 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 funded jointly 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: 27991 SUBJECT: GRB 200619A: AGILE detection DATE: 20/06/19 14:02:02 GMT FROM: Alessandro Ursi at INAF/IAPS A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Longo (Univ. Trieste and INFN Trieste), N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli, C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), A. Argan, M. Cardillo, C. Casentini, Y. Evangelista, G. Piano (INAF/IAPS), A. Bulgarelli, V. Fioretti, F. Fuschino, (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), report on behalf of the AGILE Team: The AGILE satellite detected the GRB 200619A reported by Insight-HXMT/HE (Xiao et al., GCN #27985), occurring at T0 = 2020-06-19T02:36:11.60 +/- 0.01 s (UTC). The event is visible in the scientific ratemeters (RMs) of the Anti-Coincidence (AC, 80-200 keV) and Mini-Calorimeter (MCAL, 0.4-100 MeV) detectors. Their light curves show a FRED profile, lasting ~15 s and releasing ~54380 counts in the AC RMs and ~22675 counts in the MCAL RMs. The ratemeters light curves can be found at http://www.agilescienceapp.it/notices/RM_GRB200619A.png . Additional analysis of AGILE data is in progress. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27993 SUBJECT: GRB 200619A: Fermi GBM observation DATE: 20/06/19 21:15:01 GMT FROM: Cori Fletcher at USRA C. Fletcher (USRA) and C. Meegan (UAH) report on behalf of the Fermi GBM Team: "At 02:36:11.67 UT on 19 June 2020, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 200619A (trigger 614226976 / 200619108). This burst was also detected by the AGILE satellite (A. Ursi et al. 2020, GCN 27991) and Insight-HXMT/HE (S. Xiao et al. 2020, GCN 27985). The on-ground calculated location, using the GBM trigger data, is RA = 101.4, DEC = 56.7 (J2000 degrees, equivalent to 06h 45m, 56d 44'), with a statistical uncertainty of 4.0 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a core-plus-tail model, with 90% of GRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg systematic error. [Connaughton et al. 2015, ApJS, 216, 32] ). The angle from the Fermi LAT boresight at the GBM trigger time is 103 degrees. The GBM light curve consists of a single bright peak with a duration (T90) of about 29 s (50-300 keV). The time-averaged spectrum from T0+0.003 s to T0+29.120 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.82 +/- 0.06 and the cutoff energy, parameterized as Epeak, is 1268 +/- 199 keV. The event fluence (10-1000 keV) in this time interval is (1.42 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.064 s in the 10-1000 keV band is 4.8 +/- 0.4 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"