GRB 241229C
GCN Circular 38716
Subject
GRB 241229C: Fermi GBM Final Real-time Localization
Date
2024-12-29T23:38:14Z (5 months 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 SHORT GRB
At 23:27:37 UT on 29 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241229C (trigger 757207662.335616 / 241229978).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 219.8, Dec = 15.3 (J2000 degrees, equivalent to J2000 14h 39m, 15d 18'), with a statistical uncertainty of 16.2 degrees.
The angle from the Fermi LAT boresight is 12.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241229978/quicklook/glg_skymap_all_bn241229978.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/bn241229978/quicklook/glg_healpix_all_bn241229978.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241229978/quicklook/glg_lc_medres34_bn241229978.gif
GCN Circular 38718
Subject
Fermi Gamma-ray Burst Monitor trigger 757207662/241229978 (GRB 241229C) is not a GRB
Date
2024-12-30T00:22:47Z (5 months ago)
From
Ava Myers at NASA GSFC <ava.myers@nasa.gov>
Via
Web form
A. Myers (NPP/GSFC) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:
"The Fermi Gamma-ray Burst Monitor (GBM) trigger 757207662/241229978 at 23:27:37.34 UT
on 29 December 2024, tentatively classified as a GRB, is in fact not due
to a GRB. This trigger is likely due to a solar flare."