//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27489 SUBJECT: GRB 200403C: Fermi GBM Final Real-time Localization DATE: 20/04/03 23:32:22 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 23:21:57 UT on 3 Apr 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200403C (trigger 607648922.370564 / 200403974). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 48.8, Dec = 19.1 (J2000 degrees, equivalent to J2000 03h 15m, 19d 06'), with a statistical uncertainty of 5.0 degrees. The angle from the Fermi LAT boresight is 107.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200403974/quicklook/glg_skymap_all_bn200403974.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/bn200403974/quicklook/glg_healpix_all_bn200403974.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200403974/quicklook/glg_lc_medres34_bn200403974.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27494 SUBJECT: Fermi GRB 200403C: Global MASTER-Net observations report DATE: 20/04/04 18:15:07 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), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 200403C ( Fermi GBM team, GCN 27489) errorbox 62342 sec after notice time and 62370 sec after trigger time at 2020-04-04 16:41:27 UT, with upper limit up to 17.3 mag. Observations started at twilight. The observations began at zenith distance = 68 deg. The sun altitude is -11.6 deg. The galactic latitude b = -32 deg., longitude l = 163 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1329210 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 62401 | 2020-04-04 16:41:27 | MASTER-Kislovodsk | (03h 11m 42.15s , +19d 58m 00.3s) | C | 60 | 16.7 | 62401 | 2020-04-04 16:41:27 | MASTER-Kislovodsk | (03h 03m 13.52s , +20d 24m 11.0s) | C | 60 | 16.7 | 62642 | 2020-04-04 16:45:29 | MASTER-Kislovodsk | (03h 28m 50.74s , +19d 56m 42.9s) | C | 60 | 17.0 | 62642 | 2020-04-04 16:45:29 | MASTER-Kislovodsk | (03h 20m 20.50s , +20d 22m 48.3s) | C | 60 | 17.0 | 62722 | 2020-04-04 16:46:49 | MASTER-Kislovodsk | (03h 11m 45.22s , +19d 57m 25.2s) | C | 60 | 17.0 | 62722 | 2020-04-04 16:46:49 | MASTER-Kislovodsk | (03h 03m 16.81s , +20d 23m 27.9s) | C | 60 | 17.0 | 62978 | 2020-04-04 16:51:05 | MASTER-Kislovodsk | (03h 28m 45.82s , +19d 57m 12.6s) | C | 60 | 17.1 | 62978 | 2020-04-04 16:51:05 | MASTER-Kislovodsk | (03h 20m 15.83s , +20d 23m 15.2s) | C | 60 | 17.3 | 63058 | 2020-04-04 16:52:25 | MASTER-Kislovodsk | (03h 14m 17.49s , +21d 57m 37.1s) | C | 60 | 16.9 | 63058 | 2020-04-04 16:52:25 | MASTER-Kislovodsk | (03h 05m 41.29s , +22d 23m 38.2s) | C | 60 | 17.0 | 63139 | 2020-04-04 16:53:46 | MASTER-Kislovodsk | (03h 26m 22.18s , +17d 56m 59.2s) | C | 60 | 16.9 | 63139 | 2020-04-04 16:53:46 | MASTER-Kislovodsk | (03h 17m 59.46s , +18d 22m 59.6s) | C | 60 | 17.0 | 63219 | 2020-04-04 16:55:06 | MASTER-Kislovodsk | (03h 31m 31.08s , +21d 56m 01.3s) | C | 60 | 17.3 | 63219 | 2020-04-04 16:55:06 | MASTER-Kislovodsk | (03h 22m 53.40s , +22d 22m 04.8s) | C | 60 | 17.2 | 63300 | 2020-04-04 16:56:27 | MASTER-Kislovodsk | (03h 17m 15.19s , +23d 55m 48.4s) | C | 60 | 16.6 | 63300 | 2020-04-04 16:56:27 | MASTER-Kislovodsk | (03h 08m 30.41s , +24d 21m 49.5s) | C | 60 | 16.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.