Planck 2013 results
Free Access

Fig. E.1


Intrinsic colour of quasars as a function of redshift for (uz), (ui), (gr) and (gi), top to bottom. The black points give the intercept of the (mXmY) vs. NH i relation in each bin of redshift (see Eq. (E.7)). The triangles give the intrinsic colour of quasars computed with the composite spectrum (see Eq. (E.8)).

This figure is made of several images, please see below:

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