Images of the cluster A402. Left: GMRT 330 MHz contours superimposed on the X-ray Chandra image of the cluster. Contours start at 0.35 mJy beam⁻¹ and are spaced by a factor of two. The first negative contour is dashed. The beam is 13.4″ × 8.6″ and the rms noise of the radio image is ∼0.1 mJy beam⁻¹. Right: PanSTARRS optical image of the field of A402 with the same contours of the left panel (white) plus the low-resolution GMRT 330 MHz contours (yellow). Contours start at 3 mJy beam⁻¹ and are spaced by a factor of two. The rms noise of the low-resolution image is ∼1 mJy beam⁻¹ with beam = 57″ × 42″.