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GCN Circular 32806

Subject
GRB 221020A: Fermi GBM Final Real-time Localization
Date
2022-10-20T05:34:08Z (a year 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 LONG GRB

At 05:23:52 UT on 20 Oct 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221020A (trigger 687936237.82563 / 221020225).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 172.9, Dec = 16.0 (J2000 degrees, equivalent to J2000 11h 31m, 16d 00'), with a statistical uncertainty of 3.0 degrees.

The angle from the Fermi LAT boresight is 36.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221020225/quicklook/glg_skymap_all_bn221020225.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/bn221020225/quicklook/glg_healpix_all_bn221020225.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221020225/quicklook/glg_lc_medres34_bn221020225.gif
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