TITLE:   GCN CIRCULAR
NUMBER:  42124
SUBJECT: GRB 251006A: Fermi GBM Final Real-time Localization
DATE:    25/10/06 13:38:08 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 13:27:35 UT on 6 Oct 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251006A (trigger 781450060.028394 / 251006561).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 269.1, Dec = -16.6 (J2000 degrees, equivalent to J2000 17h 56m, -16d 36'), with a statistical uncertainty of 12.0 degrees.

The angle from the Fermi LAT boresight is 30.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251006561/quicklook/glg_skymap_all_bn251006561.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/bn251006561/quicklook/glg_healpix_all_bn251006561.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251006561/quicklook/glg_lc_medres34_bn251006561.gif