TITLE:   GCN CIRCULAR
NUMBER:  33247
SUBJECT: GRB 230201B: Fermi GBM Final Real-time Localization
DATE:    23/02/01 20:07:10 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 19:56:48 UT on 1 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230201B (trigger 696974213.104426 / 230201831).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 27.4, Dec = 16.5 (J2000 degrees, equivalent to J2000 01h 49m, 16d 30'), with a statistical uncertainty of 2.2 degrees.

The angle from the Fermi LAT boresight is 49.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230201831/quicklook/glg_skymap_all_bn230201831.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/bn230201831/quicklook/glg_healpix_all_bn230201831.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230201831/quicklook/glg_lc_medres34_bn230201831.gif