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Table 3

Summary of the performance of the different classifiers.

Name Test Test 1 deg2 DESI cross-match (point-like) DESI cross-match (all)
f1 score Test purity comp. f1 score purity comp. f1 score purity comp. f1 score purity comp.
SQUEZE 0.59 0.69 0.51 0.36 0.27 0.53 0.69 0.65 0.73 0.40 0.28 0.66
0.36 0.51 0.29 0.17 0.12 0.28 0.60 0.68 0.53 0.28 0.20 0.47
CNN1 0.87 0.91 0.83 0.76 0.71 0.83 0.65 0.54 0.82 0.25 0.15 0.82
0.76 0.77 0.76 0.41 0.28 0.75 0.64 0.58 0.73 0.40 0.29 0.64
CNN1NE 0.74 0.83 0.67 0.63 0.57 0.71 0.73 0.73 0.73 0.48 0.36 0.74
0.67 0.64 0.69 0.30 0.19 0.67 0.63 0.53 0.78 0.25 0.15 0.69
CNN2 0.81 0.91 0.73 0.74 0.72 0.76 0.67 0.63 0.73 0.27 0.17 0.72
0.73 0.72 0.73 0.36 0.24 0.73 0.70 0.63 0.77 0.44 0.33 0.67
RF 0.63 0.57 0.71 0.32 0.21 0.69 0.59 0.59 0.59 0.26 0.16 0.62
0.59 0.54 0.65 0.20 0.12 0.63 0.55 0.43 0.75 0.24 0.15 0.68
LGBM 0.72 0.81 0.65 0.59 0.50 0.71 0.71 0.72 0.70 0.46 0.34 0.70
0.65 0.64 0.67 0.27 0.18 0.62 0.63 0.55 0.75 0.29 0.19 0.67
ANN1 0.76 0.85 0.69 0.72 0.66 0.79 0.78 0.80 0.75 0.58 0.47 0.74
0.71 0.69 0.72 0.36 0.23 0.74 0.61 0.49 0.79 0.24 0.14 0.72
ANN2 0.73 0.86 0.64 0.61 0.54 0.69 0.78 0.80 0.75 0.55 0.43 0.76
0.69 0.65 0.74 0.30 0.19 0.71 0.60 0.48 0.78 0.24 0.14 0.71
Combined algorithm 0.88 0.91 0.85 0.78 0.72 0.86 0.61 0.50 0.80 0.22 0.13 0.80
0.79 0.79 0.79 0.43 0.30 0.80 0.66 0.61 0.73 0.44 0.33 0.64

Notes. Metrics are given including objects brighter than r = 23.6. For each classifier, the first row corresponds to metrics for the high-z quasars (with z ≥ 2.1) and the second row corresponds to metrics for the low-z quasars (with z < 2.1). The first bloc corresponds to the performance on mocks (on the test and test 1 deg2 samples), and the second bloc corresponds to the performance on the DESI cross-match data (excluding and including the extended sources).

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