//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28461 SUBJECT: GRB 200919C: Fermi GBM Final Real-time Localization DATE: 20/09/19 23:18:39 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 23:08:22 UT on 19 Sep 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200919C (trigger 622249707.644918 / 200919964). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 273.4, Dec = -23.2 (J2000 degrees, equivalent to J2000 18h 13m, -23d 11'), with a statistical uncertainty of 1.2 degrees. The angle from the Fermi LAT boresight is 69.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200919964/quicklook/glg_skymap_all_bn200919964.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200919964/quicklook/glg_healpix_all_bn200919964.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200919964/quicklook/glg_lc_medres34_bn200919964.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28462 SUBJECT: Fermi GRB 200919C: Global MASTER-Net observations report DATE: 20/09/20 00:30:24 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 200919C ( Fermi GBM team, GCN 28461) errorbox 92 sec after notice time and 120 sec after trigger time at 2020-09-19 23:10:23 UT, with upper limit up to 17.6 mag. Observations started at twilight. The observations began at zenith distance = 9 deg. The sun altitude is -9.6 deg. MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 200919C errorbox 119 sec after notice time and 147 sec after trigger time at 2020-09-19 23:10:50 UT, with upper limit up to 14.2 mag. The observations began at zenith distance = 80 deg. The sun altitude is -57.8 deg. The galactic latitude b = -3 deg., longitude l = 8 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1444890 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 131 | 2020-09-19 23:10:23 | MASTER-OAFA | (18h 19m 08.51s , -22d 37m 56.3s) | C | 20 | 15.9 | 162 | 2020-09-19 23:10:50 | MASTER-SAAO | (18h 19m 36.27s , -22d 32m 15.4s) | C | 30 | 12.7 | 175 | 2020-09-19 23:11:02 | MASTER-OAFA | (18h 15m 37.21s , -23d 14m 33.1s) | C | 30 | 16.2 | 220 | 2020-09-19 23:11:02 | MASTER-OAFA | (18h 15m 37.22s , -23d 14m 33.0s) | C | 120 | 16.7 | Coadd 217 | 2020-09-19 23:11:39 | MASTER-SAAO | (18h 19m 42.17s , -22d 33m 13.2s) | C | 40 | 14.2 | 230 | 2020-09-19 23:11:52 | MASTER-OAFA | (18h 15m 40.83s , -23d 12m 39.1s) | C | 40 | 16.3 | 281 | 2020-09-19 23:12:38 | MASTER-SAAO | (18h 19m 37.00s , -22d 34m 10.9s) | C | 50 | 13.8 | 294 | 2020-09-19 23:12:51 | MASTER-OAFA | (18h 15m 33.60s , -23d 13m 34.7s) | C | 50 | 16.5 | 356 | 2020-09-19 23:13:48 | MASTER-SAAO | (18h 19m 41.80s , -22d 33m 51.0s) | C | 60 | 13.8 | 374 | 2020-09-19 23:14:01 | MASTER-OAFA | (18h 15m 34.31s , -23d 12m 34.4s) | C | 70 | 16.6 | 464 | 2020-09-19 23:14:01 | MASTER-OAFA | (18h 15m 34.30s , -23d 12m 34.4s) | C | 250 | 17.0 | Coadd 445 | 2020-09-19 23:15:08 | MASTER-SAAO | (18h 19m 38.75s , -22d 32m 04.7s) | C | 80 | 12.7 | 469 | 2020-09-19 23:15:31 | MASTER-OAFA | (18h 15m 40.04s , -23d 13m 34.7s) | C | 80 | 16.8 | 555 | 2020-09-19 23:16:47 | MASTER-SAAO | (18h 19m 38.69s , -22d 33m 57.1s) | C | 100 | 13.6 | 578 | 2020-09-19 23:17:10 | MASTER-OAFA | (18h 15m 33.16s , -23d 14m 34.6s) | C | 100 | 16.9 | 685 | 2020-09-19 23:18:47 | MASTER-SAAO | (18h 16m 01.39s , -23d 13m 46.8s) | C | 120 | 12.1 | 712 | 2020-09-19 23:19:10 | MASTER-OAFA | (18h 11m 58.22s , -23d 56m 21.3s) | C | 130 | 17.3 | 882 | 2020-09-19 23:19:10 | MASTER-OAFA | (18h 11m 58.22s , -23d 56m 21.3s) | C | 470 | 17.5 | Coadd 839 | 2020-09-19 23:21:06 | MASTER-SAAO | (18h 15m 54.46s , -23d 14m 35.1s) | C | 150 | 12.5 | 877 | 2020-09-19 23:21:39 | MASTER-OAFA | (18h 11m 55.67s , -23d 54m 35.7s) | C | 160 | 17.4 | 1024 | 2020-09-19 23:23:56 | MASTER-SAAO | (18h 15m 53.68s , -23d 13m 25.4s) | C | 180 | 12.3 | 1066 | 2020-09-19 23:24:39 | MASTER-OAFA | (18h 11m 55.63s , -23d 56m 13.8s) | C | 180 | 17.5 | 1266 | 2020-09-19 23:27:58 | MASTER-OAFA | (18h 11m 58.50s , -23d 54m 40.9s) | C | 180 | 17.6 | 1465 | 2020-09-19 23:31:18 | MASTER-OAFA | (18h 11m 52.71s , -23d 55m 31.2s) | C | 180 | 17.5 | 1665 | 2020-09-19 23:34:37 | MASTER-OAFA | (18h 11m 51.61s , -23d 54m 31.9s) | C | 180 | 17.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28472 SUBJECT: GRB 200919C: Insight-HXMT/HE detection DATE: 20/09/22 15:22:53 GMT FROM: Wangchen Xue at IHEP W. C. Xue, Y. G. Zheng, C. Cai, Q. Luo, S. Xiao, Q. B. Yi, 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 2020-09-19T23:08:22.64 (T0), Insight-HXMT/HE detected GRB 200919C (trigger ID: HEB200919964) in a routine search of the data, which also triggered Fermi/GBM (Fermi GBM team, GCN #28461). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 58.43 s measured from T0+2.33 s. The 1-ms peak rate, measured from T0+50.10 s, is 1160 cnts/sec. The total counts from this burst is 17758 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB200919964_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 (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.