Logarithmically scaled contour image resolving the M 31 nucleus (ObsID 10684). Coordinate system in RA and Dec. Image smoothed with Gaussian function of 2 pixel FWHM and contours are chosen at 0.5, 1.1, and 1.5 counts per pixel to illustrate the separation of the two sources at the core of M 31 (double-core east No. 165 and west No. 164). Nos. 162, 169, 170, and 172 were not active in this observation. The region size is the 90% encircled count fraction PSF.