Upper panels: smoothed γ-ray test static (TS) maps (10° × 10° scale with 0.°2 per pixel; GB6 J2113+1121 not included in the mode file) of the region that is spatially compatible with the arrival direction of the neutrino IC 191001A. The left one is based on the Fermi-LAT data with a time range between MJD 54,683 (i.e., the beginning of its operation) and MJD 58,383 (marked as a black vertical dashed line in the bottom panel), while the right one corresponds to the rest of the Fermi-LAT data. The black circle represents the 95% C. L. γ-ray localization error radius of GB6 J2113+1121, and the black cross corresponds to its radio location. Bottom panel: half-year time bin γ-ray light curves of the three γ-ray sources spatially coincident with the neutrino IC 191001A. Blue circles and red triangles are flux estimations and upper limits, and TS values corresponding to each time bin are also shown. The horizontal lines represent the averaged fluxes of the sources for the entire data set along with the 1σ uncertainties. The red vertical line marks the arrival time of the neutrino IC 191001A.