XMM-Newton X-ray images with a size of 6.0 × 6.0 arcmin of SNR G306.3–0.9 in three energy bands. Left panel: soft X-ray energies (0.5−1.0 keV). Middle: medium X-ray energies (1.0−2.0 keV). Right: hard X-ray energies (2.0−4.5 keV). Smoothed images were convolved with a 2D Gaussian function with a kernel of σ = 20 arcsec. Overlapping contour levels at 2, 4, 10, 12, and 19 mJy beam^-1 represent the 843 MHz radio image taken from the MOST Supernova Remnant Catalog (Whiteoak & Green 1996).