Top left panel: full-resolution LOFAR image contours (white; shown in the top right panel) of Abell 2048, overlaid on an exposure-corrected background-subtracted XMM-Newton image in the 0.5−2.0 keV energy band with a total integration time of 68 ks. Top right panel: 150 MHz LOFAR image (13″ × 6″) of the source Abell 2048. The black contours and dashed lines show the (1,2,4,...) × 5 × σ_LOFAR150 and −3 × σ_LOFAR150 levels, respectively, where σ_LOFAR150 = 266 μJy beam⁻¹. Middle left panel: 325 MHz GMRT image (11″ × 8″) of Abell 2048. The black contours and dashed lines show the (1,2,4,...) × 5 × σ_GMRT325 and −3 × σ_GMRT325 levels, respectively, where σ_GMRT325 = 125 μJy beam⁻¹. Middle right panel: 610 MHz GMRT image (8″ × 5″) of Abell 2048. The black contours and dashed lines show the (1,2,4,...) ×5 × σ_GMRT610 and −3 × σ_GMRT610 levels, respectively, where σ_GMRT610 = 117 μJy beam⁻¹. Bottom left panel: LOFAR 150 MHz contours (shown in the left panel in red) overlaid on an DSS2 r-band image of Abell 2048. A possible optical counterpart is labelled RG. Bottom right panel: LOFAR 150 MHz contours (shown in the top right panel) overplotted on the high-resolution (20″ × 20″) spectral index map of Abell 2048.