Steep radio spectrum quasar blue magnitudes
18.4
19.7
17.5
17.1
19.5
16.0
19.2
19.3
19.8
19.0
18.6
20.2
17.4
20.0
16.7
19.0
18.9
18.8
16.6
20.9
20.9
18.1
15.3
20.8
20.2
18.8
20.3
19.8
18.9
20.0
19.8
19.5
18.8
18.8 
18.3