GCN Circular 33344
Subject
GRB 230218A: Fermi GBM Final Real-time Localization
Date
2023-02-18T15:56:53Z (2 years 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 15:46:27 UT on 18 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230218A (trigger 698427992.71955 / 230218657).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 39.6, Dec = 55.1 (J2000 degrees, equivalent to J2000 02h 38m, 55d 06'), with a statistical uncertainty of 16.0 degrees.
The angle from the Fermi LAT boresight is 10.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230218657/quicklook/glg_skymap_all_bn230218657.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/bn230218657/quicklook/glg_healpix_all_bn230218657.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230218657/quicklook/glg_lc_medres34_bn230218657.gif