TITLE:   GCN CIRCULAR
NUMBER:  33771
SUBJECT: GRB 230511C: Fermi GBM Final Localization
DATE:    23/05/11 14:23:20 GMT
FROM:    Joshua Wood at NASA/MSFC <joshua.r.wood@nasa.gov>

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

"At 03:28:07.47 UT on 11 May 2023, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 230511C (trigger 705468492/230511145).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 262.8, Dec = -13.6 (J2000 degrees, equivalent to J2000 17h 31m, -13d 34'),
with a statistical uncertainty of 9.2 degrees.

The angle from the Fermi LAT boresight is 98 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230511145/quicklook/glg_skymap_all_bn230511145.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/bn230511145/quicklook/glg_healpix_all_bn230511145.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230511145/quicklook/glg_lc_medres34_bn230511145.gif"