TITLE:   GCN CIRCULAR
NUMBER:  39172
SUBJECT: GRB 250206A: Fermi GBM Final Real-time Localization
DATE:    25/02/06 20:02:04 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 19:51:31 UT on 6 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250206A (trigger 760564296.928588 / 250206827).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 222.1, Dec = -65.0 (J2000 degrees, equivalent to J2000 14h 48m, -65d 00'), with a statistical uncertainty of 1.7 degrees.

The angle from the Fermi LAT boresight is 33.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250206827/quicklook/glg_skymap_all_bn250206827.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/bn250206827/quicklook/glg_healpix_all_bn250206827.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250206827/quicklook/glg_lc_medres34_bn250206827.gif