TITLE:   GCN CIRCULAR
NUMBER:  33526
SUBJECT: GRB 230328B: Fermi GBM Final Real-time Localization
DATE:    23/03/28 15:05:06 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 14:54:47 UT on 28 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230328B (trigger 701708092.430074 / 230328621).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 301.8, Dec = 75.6 (J2000 degrees, equivalent to J2000 20h 07m, 75d 35'), with a statistical uncertainty of 3.2 degrees.

The angle from the Fermi LAT boresight is 38.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230328621/quicklook/glg_skymap_all_bn230328621.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/bn230328621/quicklook/glg_healpix_all_bn230328621.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230328621/quicklook/glg_lc_medres34_bn230328621.gif