XGBoost ML classifier of BASS DR3 sources

Finally, all selected sources in the BASS DR3 catalogue are classified by these classifiers. The classification label and probabilities for individual sources are assigned by different classifiers. When the predicted results by binary classification are the same as multiclass classification with optical and infrared information, the number of star, galaxy, and quasar candidates is separately 12 375 838 (P_S_ > 0.95), 18 606 073 (P_G_ > 0.95), and 798 928 (P_Q_ > 0.95).

For these sources without infrared information, the predicted results can be as a reference. Those candidates may be taken as input catalogue of LAMOST, DESI (Dark Energy Spectroscopic Instrument), or other projects for follow-up observation. The classified result will be of great help and reference for future research of the BASS DR3 sources.