LoTSS DR3 map of the wider area surrounding the LHAASO sources in Galactic coordinates. The central frequency is 144 MHz and the noise level is σ_rms = 100 μJy beam⁻¹ at a resolution of 6″. The green circles show the 39% containment radius of the LHAASO sources, and the red contours mark the 0.5 − 7 keV emission around XMMU J034124.2+525720 smoothed to 20″ resolution, starting at 5 × 10⁻⁶ cts s⁻¹ arcsec⁻² and increasing in factors of two.