Contour plots of the logarithmically scaled merged HRC-I images with dashed circular regions at the radio positions with approximate radio radii (Fesen et al. 1999; Sjouwerman & Dickel 2001) of the known supernova remnants within 90′′ of the center of M 31. The images are smoothed with a Gaussian function of 7-pixel FWHM and contour levels are at 0.53, 0.56, 0.6, and 0.7 counts per pixel. North is up and east to the left. The zoom is slightly different (for region size and SNR names see Table 9). The X-ray catalogue source regions are circles with ~90% encircled count fraction radius.