Fig. 8.
Comparison of the spectroscopic and photometric redshifts for SDSS test-set quasars. Left: random test (r < 21.3). Right: faint extrapolation (21.3 < r < 22). The mean photo-z error for the random and faint test equals 0.009 ± 0.12 and −0.0004 ± 0.19, respectively. Every redshift estimate is a Gaussian probability density function, the standard deviation of which represents the uncertainty (color coded).
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