GCN Circular 32509
Subject
GRB 220831B: Fermi GBM Final Localization
Date
2022-09-01T16:45:13Z (3 years ago)
From
Joshua Wood at MSFC/Fermi-GBM <joshua.r.wood@nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 13:11:36.16 UT on 31 Aug 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220831B (trigger 683644301 / 220831550).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 167.3, Dec = +1.0 (J2000 degrees, equivalent to J2000 11h 09m, +01d 00'), with a statistical uncertainty of 4.7 degrees.
The angle from the Fermi LAT boresight is 63.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220831550/quicklook/glg_skymap_all_bn220831550.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220831550/quicklook/glg_healpix_all_bn220831550.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220831550/quicklook/glg_lc_medres34_bn220831550.gif