TITLE: GCN CIRCULAR NUMBER: 31029 SUBJECT: GRB 211102A: Fermi GBM Final Real-time Localization DATE: 21/11/02 08:17:17 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 08:06:03 UT on 2 Nov 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211102A (trigger 657533168.218864 / 211102338).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 30.8, Dec = 56.8 (J2000 degrees, equivalent to J2000 02h 03m, 56d 47'), with a statistical uncertainty of 4.1 degrees.

The angle from the Fermi LAT boresight is 17.0 degrees.

The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211102338/q...

The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211102338/q...

The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211102338/q...