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Fig. 7

image

Average number of quasars in the sky per square degree, detected by the CNN, against the recall. The larger the recall, the higher the number of the detected quasars is. For a recall of 0.92, the average number of detected quasars is 20 per square degree. Then this number is drastically increased since the precision is reduced and so the contamination of non-quasar sources is increased.

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