Fig. 2.
Left: composite g-r image of NGC 4104 with X-ray Chandra contours overlaid. Middle: Chandra adaptively smoothed image in the [0.5–7.0 keV] band. Right: XMM-Newton merged MOS1, MOS2, and pn image in the same energy band as the Chandra image. The contours and colours of the X-ray images are in logarithmic scale. The circles on the images, with R = 25″ and 90″, correspond to the extraction regions for the spectral analysis. The overall shape of the X-ray emission follows the ellipticity of NGC 4104. We note that the two brightest galaxies on the stellar envelope to the southwest, SDSS J120633.94 and SDSS J120630.86, are themselves X-ray sources.
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