Cutouts of all 42 sources present in our final sample. ID 13 has already been shown in the main text. For IDs 1 to 14, 42, and 43, the sources belong to the first pointing and therefore are observed in ch3 and not ch4. For IDs 15 to 43, the objects are observed in ch4 and not in ch3; some of them are missing ch1 data because of the different image sizes (see the explanation in Sect. 2.2). These cutouts are 15″ × 15″.