TITLE:   GCN CIRCULAR
NUMBER:  39350
SUBJECT: GRB 250217A: Fermi GBM Final Real-time Localization
DATE:    25/02/17 07:57:49 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 SHORT GRB

At 07:47:25 UT on 17 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250217A (trigger 761471250.62418 / 250217325).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 154.9, Dec = 1.9 (J2000 degrees, equivalent to J2000 10h 19m, 1d 53'), with a statistical uncertainty of 11.3 degrees.

The angle from the Fermi LAT boresight is 80.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250217325/quicklook/glg_skymap_all_bn250217325.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250217325/quicklook/glg_healpix_all_bn250217325.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250217325/quicklook/glg_lc_medres34_bn250217325.gif