TITLE:   GCN CIRCULAR
NUMBER:  46128
SUBJECT: GRB 261102A: Fermi GBM Final Real-time Localization
DATE:    26/11/02 06:20:49 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 06:09:19 UT on 2 Nov 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 261102A (trigger 815292564.30768 / 261102256).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 102.1, Dec = 53.5 (J2000 degrees, equivalent to J2000 06h 48m, 53d 30'), with a statistical uncertainty of 8.3 degrees.

The angle from the Fermi LAT boresight is 27.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261102256/quicklook/glg_skymap_all_bn261102256.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261102256/quicklook/glg_healpix_all_bn261102256.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261102256/quicklook/glg_lc_medres34_bn261102256.gif