TITLE: GCN CIRCULAR NUMBER: 35993 SUBJECT: GRB 240329A: Fermi GBM Final Real-time Localization DATE: 24/03/29 21:53:41 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 21:43:07 UT on 29 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240329A (trigger 733441392.528372 / 240329905).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 259.7, Dec = -4.8 (J2000 degrees, equivalent to J2000 17h 18m, -4d 47'), with a statistical uncertainty of 3.8 degrees.

The angle from the Fermi LAT boresight is 97.0 degrees.

The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240329905/q...

The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240329905/q...

The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240329905/q...

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