TITLE:   GCN CIRCULAR
NUMBER:  33231
SUBJECT: GRB 230128A: Fermi GBM Final Real-time Localization
DATE:    23/01/28 22:57:57 GMT
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 22:47:49 UT on 28 Jan 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230128A (trigger 696638874.07722 / 230128950).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 197.6, Dec = 61.7 (J2000 degrees, equivalent to J2000 13h 10m, 61d 42'), with a statistical uncertainty of 6.3 degrees.

The angle from the Fermi LAT boresight is 90.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230128950/quicklook/glg_skymap_all_bn230128950.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/bn230128950/quicklook/glg_healpix_all_bn230128950.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230128950/quicklook/glg_lc_medres34_bn230128950.gif