TITLE:   GCN CIRCULAR
NUMBER:  25799
SUBJECT: GRB 190921A: Fermi GBM Final Real-time Localization
DATE:    19/09/21 16:56:12 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 16:45:55 UT on 21 Sep 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190921A (trigger 590777160.12475 / 190921699).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 338.4, Dec = -63.4 (J2000 degrees, equivalent to J2000 22h 33m, -63d 23'), with a statistical uncertainty of 5.4 degrees.

The angle from the Fermi LAT boresight is 17.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190921699/quicklook/glg_skymap_all_bn190921699.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/bn190921699/quicklook/glg_healpix_all_bn190921699.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190921699/quicklook/glg_lc_medres34_bn190921699.gif