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GCN Circular 26111

Subject
GRB 191031C: Fermi GBM Final Real-time Localization
Date
2019-10-31T21:33:56Z (4 years ago)
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 SHORT GRB

At 21:23:31 UT on 31 Oct 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191031C (trigger 594249816.128134 / 191031891).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 282.8, Dec = 55.0 (J2000 degrees, equivalent to J2000 18h 51m, 55d 00'), with a statistical uncertainty of 2.4 degrees.

The angle from the Fermi LAT boresight is 58.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191031891/quicklook/glg_skymap_all_bn191031891.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191031891/quicklook/glg_healpix_all_bn191031891.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191031891/quicklook/glg_lc_medres34_bn191031891.gif
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