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GCN Circular 33171

Subject
GRB 230116A: Fermi GBM Final Real-time Localization
Date
2023-01-16T05:05:00Z (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 04:54:34 UT on 16 Jan 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230116A (trigger 695537679.288856 / 230116205).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 81.3, Dec = -49.7 (J2000 degrees, equivalent to J2000 05h 25m, -49d 42'), with a statistical uncertainty of 2.1 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/bn230116205/quicklook/glg_skymap_all_bn230116205.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/bn230116205/quicklook/glg_healpix_all_bn230116205.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116205/quicklook/glg_lc_medres34_bn230116205.gif
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