TITLE:   GCN CIRCULAR
NUMBER:  31060
SUBJECT: GRB 211109B: Fermi GBM Final Real-time Localization
DATE:    21/11/09 02:53:35 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 02:42:47 UT on 9 Nov 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211109B (trigger 658118572.33636 / 211109113).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 252.8, Dec = -45.1 (J2000 degrees, equivalent to J2000 16h 51m, -45d 06'), with a statistical uncertainty of 1.9 degrees.

The angle from the Fermi LAT boresight is 13.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211109113/quicklook/glg_skymap_all_bn211109113.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211109113/quicklook/glg_healpix_all_bn211109113.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211109113/quicklook/glg_lc_medres34_bn211109113.gif