Cluster pair RXCJ1825/CIZAJ1824 as observed with LOFAR HBA at high (left) and medium (center) resolution, and with XMM-Newton in the 0.5 − 2.0 keV band (right). The resolution and rms noise of the LOFAR images are 8.5″ × 4.7″ and σ = 110 μJy beam⁻¹ (high), and 27.1″ × 24.4″ and σ = 220 μJy beam⁻¹ (medium). The beam sizes are shown in the bottom left corners. The blue box in the LOFAR medium-resolution image shows the region where we evaluate the flux density of the halo. Yellow circles in the XMM-Newton image denote the approximate location of r₅₀₀ for each cluster (cf. Table 1), while the arrow indicates the Southern Galaxy. The displayed images have matched coordinates and cover a FoV of 33′×33′ (cf. Fig. 2).