TITLE:   GCN CIRCULAR
NUMBER:  33775
SUBJECT: GRB 230511D: Fermi GBM Final Real-time Localization
DATE:    23/05/11 22:50:51 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 22:40:18 UT on 11 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230511D (trigger 705537623.19843 / 230511945).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 237.5, Dec = -17.4 (J2000 degrees, equivalent to J2000 15h 50m, -17d 23'), with a statistical uncertainty of 21.7 degrees.

The angle from the Fermi LAT boresight is 79.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230511945/quicklook/glg_skymap_all_bn230511945.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/bn230511945/quicklook/glg_healpix_all_bn230511945.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230511945/quicklook/glg_lc_medres34_bn230511945.gif