Flat radio spectrum quasar blue magnitudes
21.1
20.1
18.6
16.8
18.4
17.7
15.8
18.4
18.7
20.7
16.4
20.1
20.3
17.3
20.8
17.5
16.1
16.1
18.1
14.8
18.3
19.3
19.1
17.5
16.3
16.9
17.0
17.5
20.5
17.0
18.2
17.5
19.4
17.3
18.0
18.0
16.0
16.7
16.1
19.4
13.0
16.4
20.3
19.7
18.3
17.9
19.0
17.7
19.6
19.2
19.9
17.4
20.0
16.6
17.2
19.5
16.8
20.1
19.1
17.4
18.8
17.4
17.0
18.8
17.7
19.6
19.3
19.2
18.2