W1 magnitude distributions for the three main types of anomalies identified by OCSVM in AllWISE: with W1−W2 < 0, solid black (575 423 sources); with 0 ≤ W1−W2 < 0.8, orange dotted (26 990 sources); with W1−W2 ≥ 0.8, blue dashed (39 940 sources), compared with the known sources from AllWISE×SDSS used to train the OCSVM algorithm: galaxies, magenta dot-dashed (1 827 241 sources); stars, red dashed (298 269 sources); and quasars, cyan triple-dot-dashed (141 494 sources).