TITLE:   GCN CIRCULAR
NUMBER:  24691
SUBJECT: GRB 190531A: Fermi GBM Final Real-time Localization
DATE:    19/05/31 07:40:41 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 LONG GRB

At 07:29:11 UT on 31 May 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190531A (trigger 580980556.825258 / 190531312).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 21.1, Dec = 16.4 (J2000 degrees, equivalent to J2000 01h 24m, 16d 23'), with a statistical uncertainty of 2.2 degrees.

The angle from the Fermi LAT boresight is 57.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190531312/quicklook/glg_skymap_all_bn190531312.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190531312/quicklook/glg_healpix_all_bn190531312.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190531312/quicklook/glg_lc_medres34_bn190531312.gif