GCN Circular 43688
Subject
GRB 260210B: Fermi GBM Final Real-time Localization
Event
Date
2026-02-10T18:24:59Z (17 days ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 18:14:06 UT on 10 Feb 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260210B (trigger 792440051.126154 / 260210760).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 6.0, Dec = -48.3 (J2000 degrees, equivalent to J2000 00h 24m, -48d 17'), with a statistical uncertainty of 10.3 degrees.
The angle from the Fermi LAT boresight is 22.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210760/quicklook/glg_skymap_all_bn260210760.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/bn260210760/quicklook/glg_healpix_all_bn260210760.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210760/quicklook/glg_lc_medres34_bn260210760.gif