TITLE:   GCN CIRCULAR
NUMBER:  32064
SUBJECT: GRB 220518B: Fermi GBM Final Real-time Localization
DATE:    22/05/18 17:22:18 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 17:11:52 UT on 18 May 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220518B (trigger 674586717.27941 / 220518717).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 293.3, Dec = -66.2 (J2000 degrees, equivalent to J2000 19h 33m, -66d 12'), with a statistical uncertainty of 8.4 degrees.

The angle from the Fermi LAT boresight is 28.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220518717/quicklook/glg_skymap_all_bn220518717.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/bn220518717/quicklook/glg_healpix_all_bn220518717.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220518717/quicklook/glg_lc_medres34_bn220518717.gif