GRB 241223A: Swift-XRT observations

Swift-XRT has performed follow-up observations of the Fermi/GBM-detected burst GRB 241223A, collecting 2.2 ks of Photon Counting (PC) mode data between T0+20.5 ks and T0+99.8 ks. No X-ray sources have been detected at the position of the GOTO optical source (GCN Circ. 38655). The 3-sigma upper limit in the field ranges from ~0.005 to ~0.006 ct s^-1, corresponding to a 0.3-10 keV observed flux of 2.0e-13 to 2.5e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum). The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/00021749. This circular is an official product of the Swift-XRT team.