Multi-wavelength images of PSZ1G139.61+24. Upper left panel: High-resolution 144 MHz LOFAR image. Levels:[−3, 3, 7, 10, 20, 30]×σ (where σ = 0.11 mJy beam⁻¹). The beam is 7.4″ × 6.0″ and is shown in the bottom left corner of the image. The insert box shows the image of the two central sources at 4.5″ × 3.8″ resolution, obtained with Briggs weighting robust=−1.25. Upper right panel: Optical Pan-STARRS RGB image with high-resolution LOFAR contours overlaid. Lower left panel: Chandra X-ray image smoothed on a scale of 1″ with overlaid low-resolution source-subtracted LOFAR contours (Levels=[−3, 3, 5, 9, 15, 20]×σ, where σ = 0.3 mJy beam⁻¹ and the beam is 34.6″ × 33″). The black arc indicates the position of the cold front found by Savini et al. (2018). Lower right panel: Residual X-ray image after the subtraction of a circular double β-model. All the panels depict the same region of the sky.