Photometric properties of NGC 752. (a) Spatial distribution of NGC 752 members and UV detections. The Gaia-based cluster members (grey circles), UVOT detections (red triangles), UVIT detections (blue-filled triangles), and the stars brighter than 15.8 Gmag analysed via SED fitting (grey-filled circles) are shown. The large grey circle denotes the UVOT field of view. (b) Photometric errors in UVIT/F148W and UVIT/F169M photometry. Cluster members are shown as blue circles, while all UV detections are shown with dots. The magnitude errors in the F169M filter are offset by 0.2 mag for clarity. (c) Gaia CMD of the cluster members and their UV detections. The symbols are the same as in panel a. (d) UVOT-Gaia CMD. (e) UVIT-Gaia CMD. (f) UVIT-UVOT CMD. The reddened PARSEC isochrone (grey curve) and binary isochrone (dashed grey curve) are shown for reference in panels c–f.