TITLE: GCN CIRCULAR NUMBER: 42272 SUBJECT: GRB 251014C: Fermi GBM Final Localization DATE: 25/10/14 21:48:07 GMT FROM: Suman Bala at USRA sumanbala2210@gmail.com

The Fermi GBM team reports the detection of a likely LONG GRB

"At 20:45:58.96 UT on 14 October 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251014C (trigger 782167563/251014865).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 133.36, Dec = 14.24 (J2000 degrees, equivalent to J2000 8h 53m, +14d 14'), with a statistical uncertainty of 5.09 degrees.

The angle from the Fermi LAT boresight is 84 degrees.

The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251014865/q...

The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251014865/q...

The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251014865/q..."

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