TITLE:   GCN CIRCULAR
NUMBER:  39783
SUBJECT: GRB 250319B: Fermi GBM Final Localization
DATE:    25/03/19 15:50:43 GMT
FROM:    Cuán de Barra at UCD <cuan.debarra@ucdconnect.ie>

The Fermi GBM team reports the detection of a likely SHORT GRB

"At 05:07:28.91 UT on 19 March 2025, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 250319B (trigger 764053653/250319214).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 246.18, Dec = -70.90 (J2000 degrees, equivalent to J2000 16h 25m, 70d 54'),
with a statistical uncertainty of 3.18 degrees.

The angle from the Fermi LAT boresight is 29 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250319214/quicklook/glg_skymap_all_bn250319214.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250319214/quicklook/glg_healpix_all_bn250319214.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250319214/quicklook/glg_lc_medres34_bn250319214.gif"