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GCN Circular 33066

Subject
GRB 221216A: Fermi GBM Final Real-time Localization
Date
2022-12-16T11:31:45Z (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 11:21:18 UT on 16 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221216A (trigger 692882483.183742 / 221216473).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 276.3, Dec = -58.1 (J2000 degrees, equivalent to J2000 18h 25m, -58d 06'), with a statistical uncertainty of 5.7 degrees.

The angle from the Fermi LAT boresight is 139.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221216473/quicklook/glg_skymap_all_bn221216473.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/bn221216473/quicklook/glg_healpix_all_bn221216473.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221216473/quicklook/glg_lc_medres34_bn221216473.gif
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