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Fig. 8


Comparison of our surface brightness upper limits as a function of radius (thick dashed lines) to the reported literature detections of circum-quasar Lyα emission, de-redshifted to z = 2.3, and assuming that the reported maximum extent defines the radius of the detection aperture. The symbols feature results from the CJW06 sample (blue triangles with error bars), from the North et al. (2012) sample (green squares), the nebula from Goto et al. (2012; red diamond) and the fuzz from Francis & McDonnell (2006; cyan circle). We also show the integrated signal at various radii from the de-redshifted Weidinger et al. (2005) surface brightness profile (solid green line).

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