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GCN Circular 33357

Subject
GRB 230220B: Fermi GBM Final Real-time Localization
Date
2023-02-20T21:35:14Z (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 21:25:05 UT on 20 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230220B (trigger 698621110.792684 / 230220892).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 45.2, Dec = 28.0 (J2000 degrees, equivalent to J2000 03h 00m, 28d 00'), with a statistical uncertainty of 7.0 degrees.

The angle from the Fermi LAT boresight is 70.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230220892/quicklook/glg_skymap_all_bn230220892.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230220892/quicklook/glg_healpix_all_bn230220892.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230220892/quicklook/glg_lc_medres34_bn230220892.gif
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