TITLE:   GCN CIRCULAR
NUMBER:  28815
SUBJECT: GRB 201031B: Fermi GBM Final Real-time Localization
DATE:    20/10/31 18:01:39 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 17:51:24 UT on 31 Oct 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201031B (trigger 625859489.53606 / 201031744).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 44.2, Dec = 54.9 (J2000 degrees, equivalent to J2000 02h 56m, 54d 53'), with a statistical uncertainty of 4.0 degrees.

The angle from the Fermi LAT boresight is 16.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201031744/quicklook/glg_skymap_all_bn201031744.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201031744/quicklook/glg_healpix_all_bn201031744.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201031744/quicklook/glg_lc_medres34_bn201031744.gif