TITLE:   GCN CIRCULAR
NUMBER:  35927
SUBJECT: GRB 240315A: Fermi GBM Final Real-time Localization
DATE:    24/03/15 11:18:06 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 11:07:29 UT on 15 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240315A (trigger 732193654.441586 / 240315464).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 199.5, Dec = 21.9 (J2000 degrees, equivalent to J2000 13h 18m, 21d 53'), with a statistical uncertainty of 14.1 degrees.

The angle from the Fermi LAT boresight is 77.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240315464/quicklook/glg_skymap_all_bn240315464.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240315464/quicklook/glg_healpix_all_bn240315464.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240315464/quicklook/glg_lc_medres34_bn240315464.gif