Mean optical colours and hardness ratios with their corresponding standard deviations (in brackets) for the different spectroscopic types of sources.
|BLAGN||0.67 (0.53)||0.48 (0.44)||–0.47 (0.26)|
|NELG||1.17 (0.54)||0.68 (0.28)||–0.23 (0.47)|
|ALG||1.46 (0.38)||0.80 (0.18)||–0.62 (0.41)|
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