Panel a: reduced, final, image of NGC 352. Stars have been removed and the original image has been rotated so that the major axis of the bar is almost horizontal. Panel b: same image after applying an unsharp masking technique by means of a median filter of 15 × 15 pixels, in which the X-feature is underlined. Arrows point to the characteristic hook morphology of the branches of X. Pixel intensities vary according to the (logarithmic) grey-scale bands below the images. Darker regions correspond to higher intensities.