TITLE:   GCN CIRCULAR
NUMBER:  27607
SUBJECT: GRB 200420A: Fermi GBM Final Real-time Localization
DATE:    20/04/20 02:43:21 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely SHORT GRB

At 02:32:58 UT on 20 Apr 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200420A (trigger 609042783.59756 / 200420106).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 310.3, Dec = -27.5 (J2000 degrees, equivalent to J2000 20h 41m, -27d 30'), with a statistical uncertainty of 85.4 degrees.

The angle from the Fermi LAT boresight is 19.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200420106/quicklook/glg_skymap_all_bn200420106.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/bn200420106/quicklook/glg_healpix_all_bn200420106.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200420106/quicklook/glg_lc_medres34_bn200420106.gif