TITLE:   GCN CIRCULAR
NUMBER:  35759
SUBJECT: GRB 240220A: Fermi GBM Final Real-time Localization
DATE:    24/02/20 11:25:52 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 11:15:23 UT on 20 Feb 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240220A (trigger 730120528.966366 / 240220469).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 55.2, Dec = 26.4 (J2000 degrees, equivalent to J2000 03h 40m, 26d 23'), with a statistical uncertainty of 2.2 degrees.

The angle from the Fermi LAT boresight is 77.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240220469/quicklook/glg_skymap_all_bn240220469.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240220469/quicklook/glg_healpix_all_bn240220469.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240220469/quicklook/glg_lc_medres34_bn240220469.gif