Left panel: combined/total spectrum of the source plus the nebular emission in the X-rays (in red) and the nebular X-ray spectrum of T Pyx (in black). Middle panel: fit of a single componant plasma model to the X-ray nebular spectrum and the residuals in sigmas. Black denotes the spectrum derived from the 2×2 pixel smoothed images (also on the left) and the red spectrum is the one derived from the 3×3 pixel smoothed images. Right panel: Chandra ACIS-S3 combined spectrum fitted with (tbabs*(MEKAL+CEVMKL)+tbabs*MEKAL) model of emission. The dotted lines show the contribution of the three fitted models, two of which fit the X-ray nebular spectrum and the third fits the central source spectrum. The lower panel shows the residuals in standard deviations (in sigma).