Fig. 4.

Example set of images from LGZ for two different sources (top and bottom panels). From left to right panels: LoTSS (yellow contours), FIRST (green contours), and Pan-STARRS (colour); Pan-STARRS (colour) and Pan-STARRS and WISE catalogued sources (x’s and crosses, respectively); LoTSS, FIRST, and WISE band 1 (colour). The gridding interval in the vertical (N–S) direction is 1 arcmin. In the top panels the PYBDSF object of interest (indicated with the red cross) is a lobe of a radio galaxy. The volunteer should associate it with the core and northern lobe, but not with the smaller source on the northern edge of the image, which appears unrelated. No Pan-STARRS counterpart to the radio source is apparent, but there is a clear WISE band 1 detection and a marginal FIRST detection (green contours) co-located with the central LoTSS component, suggesting that this is very probably the host galaxy. In the bottom panels there is no other PYBDSF source to associate with the one of interest and there are clear Pan-STARRS and WISE detections coincident with the FIRST core.
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