TITLE:   GCN CIRCULAR
NUMBER:  25387
SUBJECT: GRB 190817A: Fermi GBM Final Real-time Localization
DATE:    19/08/17 23:02:43 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 22:52:25 UT on 17 Aug 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190817A (trigger 587775150.501982 / 190817953).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 275.2, Dec = -31.1 (J2000 degrees, equivalent to J2000 18h 20m, -31d 06'), with a statistical uncertainty of 11.6 degrees.

The angle from the Fermi LAT boresight is 92.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190817953/quicklook/glg_skymap_all_bn190817953.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/bn190817953/quicklook/glg_healpix_all_bn190817953.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190817953/quicklook/glg_lc_medres34_bn190817953.gif