//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27472 SUBJECT: GRB 200402A: Fermi GBM Final Real-time Localization DATE: 20/04/02 09:49:59 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 09:39:37 UT on 2 Apr 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200402A (trigger 607513182.90837 / 200402403). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 50.5, Dec = 42.3 (J2000 degrees, equivalent to J2000 03h 22m, 42d 17'), with a statistical uncertainty of 5.1 degrees. The angle from the Fermi LAT boresight is 88.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200402403/quicklook/glg_skymap_all_bn200402403.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/bn200402403/quicklook/glg_healpix_all_bn200402403.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200402403/quicklook/glg_lc_medres34_bn200402403.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27474 SUBJECT: GRB 200402A: BALROG localization (Fermi Trigger 607513182 / GRB 200402403) DATE: 20/04/02 10:20:48 GMT FROM: Jochen Greiner at MPE,Garching B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 607513182 at 09:39:37 on 02 April 2020 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) = 44.0+/-2.4 deg Decl.(2000.0) = 43.7+/-2.3 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB200402403/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB200402403/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB200402403/json //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27475 SUBJECT: Fermi GRB 200402A: Global MASTER-Net observations report DATE: 20/04/02 11:30:07 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-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 200402A ( Fermi GBM team, GCN 27472) errorbox 5729 sec after notice time and 5754 sec after trigger time at 2020-04-02 11:15:32 UT, with upper limit up to 17.0 mag. Observations started at twilight. The observations began at zenith distance = 55 deg. The sun altitude is -11.9 deg. The galactic latitude b = -12 deg., longitude l = 151 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1328194 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 5785 | 2020-04-02 11:15:32 | MASTER-Amur | (02h 52m 11.07s , +43d 55m 08.3s) | C | 60 | 15.8 | 5864 | 2020-04-02 11:16:52 | MASTER-Amur | (02h 46m 41.32s , +41d 54m 04.5s) | C | 60 | 15.8 | 5944 | 2020-04-02 11:18:11 | MASTER-Amur | (02h 58m 14.77s , +45d 54m 24.0s) | C | 60 | 16.1 | 6105 | 2020-04-02 11:20:53 | MASTER-Amur | (02h 52m 05.11s , +43d 55m 55.5s) | C | 60 | 16.7 | 6185 | 2020-04-02 11:22:12 | MASTER-Amur | (03h 03m 17.29s , +43d 54m 57.2s) | C | 60 | 17.0 | 6264 | 2020-04-02 11:23:32 | MASTER-Amur | (02h 46m 34.49s , +41d 53m 50.0s) | C | 60 | 16.6 | 6344 | 2020-04-02 11:24:51 | MASTER-Amur | (02h 57m 26.77s , +41d 54m 01.6s) | C | 60 | 16.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.