GCN Circular 27607
Subject
GRB 200420A: Fermi GBM Final Real-time Localization
Date
2020-04-20T02:43:21Z (5 years ago)
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