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GCN Circular 32820

Subject
GRB 221022B: Fermi GBM Final Real-time Localization
Date
2022-10-22T23:05:54Z (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 22:55:48 UT on 22 Oct 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221022B (trigger 688172153.911872 / 221022955).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 167.4, Dec = 15.4 (J2000 degrees, equivalent to J2000 11h 09m, 15d 24'), with a statistical uncertainty of 1.8 degrees.

The angle from the Fermi LAT boresight is 93.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221022955/quicklook/glg_skymap_all_bn221022955.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/bn221022955/quicklook/glg_healpix_all_bn221022955.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221022955/quicklook/glg_lc_medres34_bn221022955.gif
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