TITLE:   GCN CIRCULAR
NUMBER:  33767
SUBJECT: GRB 230511A: Fermi GBM Final Real-time Localization
DATE:    23/05/11 11:25:42 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 11:15:05 UT on 11 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230511A (trigger 705496510.691274 / 230511469).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 145.0, Dec = 1.7 (J2000 degrees, equivalent to J2000 09h 39m, 1d 42'), with a statistical uncertainty of 16.0 degrees.

The angle from the Fermi LAT boresight is 35.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230511469/quicklook/glg_skymap_all_bn230511469.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/bn230511469/quicklook/glg_healpix_all_bn230511469.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230511469/quicklook/glg_lc_medres34_bn230511469.gif