TITLE:   GCN CIRCULAR
NUMBER:  32092
SUBJECT: GRB 220523A: Fermi GBM Final Real-time Localization
DATE:    22/05/23 04:21:51 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 LONG GRB

At 04:11:29 UT on 23 May 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220523A (trigger 674971894.896998 / 220523175).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 136.7, Dec = -37.5 (J2000 degrees, equivalent to J2000 09h 06m, -37d 30'), with a statistical uncertainty of 8.3 degrees.

The angle from the Fermi LAT boresight is 64.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220523175/quicklook/glg_skymap_all_bn220523175.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220523175/quicklook/glg_healpix_all_bn220523175.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220523175/quicklook/glg_lc_medres34_bn220523175.gif