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Fig. 3


An example of X-ray images and the surface brightness distributions for individual objects is presented. The object shown here is UGC 8387 (=IC 883). Similar multi-panel figures for the other 43 objects in our C-GOALS sample can be found in Appendix. Upper left: the X-ray (0.4–7 keV) brightness contours overlaid on the HST ACS I-band image. Upper right: the radial surface brightness profiles in the 0.5–2 keV (open circles) and 2–7 keV (filled squares) bands are shown. These profiles are the azimuthal average and are measured from the peak of 2–7 keV emission at 1 arcsec resolution. The Point Spread Function (PSF) computed at 3 keV is shown as a dotted histogram where the peak has been matched to the observed 2–7 keV peak for comparison. The bottom four-panel figure shows (left to right) the raw 0.4–7 keV image, the Gaussian smoothed version of the same image, the 0.5–2 keV smoothed image, and the 2–7 keV smoothed image. The pixel size is  ≈0.5′′ × 0.5′′. The scale bar indicates 5 arcsec.

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