TITLE:   GCN CIRCULAR
NUMBER:  39327
SUBJECT: GRB 250215A: Fermi GBM Final Real-time Localization
DATE:    25/02/15 02:42:29 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 02:31:54 UT on 15 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250215A (trigger 761279519.94116 / 250215105).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 157.6, Dec = -34.5 (J2000 degrees, equivalent to J2000 10h 30m, -34d 30'), with a statistical uncertainty of 2.7 degrees.

The angle from the Fermi LAT boresight is 21.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250215105/quicklook/glg_skymap_all_bn250215105.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/bn250215105/quicklook/glg_healpix_all_bn250215105.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250215105/quicklook/glg_lc_medres34_bn250215105.gif