TITLE:   GCN CIRCULAR
NUMBER:  26078
SUBJECT: GRB 191027A: Fermi GBM Final Real-time Localization
DATE:    19/10/27 15:29:32 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 15:19:07 UT on 27 Oct 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191027A (trigger 593882352.589944 / 191027638).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 185.5, Dec = 30.4 (J2000 degrees, equivalent to J2000 12h 22m, 30d 23'), with a statistical uncertainty of 2.6 degrees.

The angle from the Fermi LAT boresight is 33.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191027638/quicklook/glg_skymap_all_bn191027638.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191027638/quicklook/glg_healpix_all_bn191027638.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191027638/quicklook/glg_lc_medres34_bn191027638.gif