Fig. 4a and b. Overlay of the HRI X-ray contours onto the optical image of NGC 4303 a taken from Frei et al. (1996) and the H image b taken from MR92. The contour levels are at 5, 7, 10, 15, 20, and 30 above the mean background with = 1.510 cts s^-1 arcsec^-2. The images are centered on the coordinates of the pointed observation. The axis scales are relative to the central X-ray maximum at coordinates = ; = . North is up, east is to the left.