LoTSS survey image (red) overlaid on a Panoramic Survey Telescope & Rapid Response System (Pan-STARRS; Flewelling et al. 2020) survey color composite (g, r, and i bands) image. The green cross marks the center position of the galaxy cluster Abell 1318 according to Abell et al. (1989). The magenta triangle marks the position of an X-ray source from the 2RXS catalog (Boller et al. 2016) and the orange plus sign marks the position of the X-ray point source highlighted in Fig. 3. The dashed white circle marks the R₂₀₀ radius of A1318 given in Wen et al. (2012) based on the cluster members found using SDSS DR12 data. The solid green circle marks the aperture in which we have searched for LoTSS catalog entries around the target; the identified sources are marked by white squares and listed in Table A.1. Yellow circles mark the cosmological neighbors of the A1318 BGG (SDSS J113603.51+550430.9) identified by the statistical analysis outlined in Sect. 3.4. The BGG is marked with a solid white circle, while the scalebar in the upper right corner indicates the linear scale for its redshift.