TITLE:   GCN CIRCULAR
NUMBER:  31983
SUBJECT: GRB 220501A: Fermi GBM Final Real-time Localization
DATE:    22/05/01 20:02:07 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 19:51:50 UT on 1 May 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220501A (trigger 673127515.736396 / 220501828).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 71.8, Dec = 11.5 (J2000 degrees, equivalent to J2000 04h 47m, 11d 30'), with a statistical uncertainty of 6.3 degrees.

The angle from the Fermi LAT boresight is 89.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220501828/quicklook/glg_skymap_all_bn220501828.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/bn220501828/quicklook/glg_healpix_all_bn220501828.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220501828/quicklook/glg_lc_medres34_bn220501828.gif