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GCN Circular 35562

Subject
GRB 240118B: Fermi GBM Final Real-time Localization
Date
2024-01-18T12:21:43Z (a month ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB

At 12:11:05 UT on 18 Jan 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240118B (trigger 727272670.288166 / 240118508).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 49.8, Dec = -55.0 (J2000 degrees, equivalent to J2000 03h 19m, -55d 00'), with a statistical uncertainty of 7.1 degrees.

The angle from the Fermi LAT boresight is 44.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240118508/quicklook/glg_skymap_all_bn240118508.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/bn240118508/quicklook/glg_healpix_all_bn240118508.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240118508/quicklook/glg_lc_medres34_bn240118508.gif


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