TITLE:   GCN CIRCULAR
NUMBER:  34622
SUBJECT: GRB 230904C: Fermi GBM Final Localization
DATE:    23/09/04 23:32:23 GMT
FROM:    Sarah Dalessi at UAH <sd0104@uah.edu>

The Fermi GBM team reports the detection of a likely SHORT GRB

"At 20:28:02.19 UT on 04 September 2023, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 230904C (trigger 715552087/230904853).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 127.66, Dec = 55.24 (J2000 degrees, equivalent to J2000 12h 28m, +55d 24'),
with a statistical uncertainty of 3.92 degrees.

The angle from the Fermi LAT boresight is 29 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230904853/quicklook/glg_skymap_all_bn230904853.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230904853/quicklook/glg_healpix_all_bn230904853.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230904853/quicklook/glg_lc_medres34_bn230904853.gif"