//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27493 SUBJECT: GRB 200404A: BALROG localization (Fermi Trigger 607712227 / GRB 200404706) DATE: 20/04/04 17:32:47 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 607712227 at 16:57:02 on 04 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) = 59.1+/-2.7 deg Decl.(2000.0) = 6.7+/-1.9 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB200404706/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB200404706/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB200404706/json //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27495 SUBJECT: GRB 200404A: Fermi GBM Final Localization DATE: 20/04/04 19:14:14 GMT FROM: Suraj Poolakkil at UAH The Fermi GBM team reports the detection of a likely LONG GRB. At 16:57:02.83 UT on 4 Apr 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200404A (trigger 607712227 / 200404706). This trigger was initially classified as a solar flare by the flight software, but is in fact a GRB. The on-ground calculated location, using the Fermi GBM trigger data, is RA = 61.93, Dec = 3.27, with a statistical uncertainty of 5.02 degrees. The angle from the Fermi LAT boresight is 90 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200404706/quicklook/glg_skymap_all_bn200404706.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/bn200404706/quicklook/glg_healpix_all_bn200404706.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200404706/quicklook/glg_lc_medres34_bn200404706.gif