Image cutouts centred on the position oſ MCXC J1016.2+4108 from RASS (left), Swift (centre), and SDSS9-i (right). The cluster apertures R_ap = 5.5′ and R₅₀₀ = 5′ are indicated in blue and red, respectively. We identified this NORAS cluster, previously without redshift, with the SDSS cluster WHL J101620.6+410545 (WH) or RMJ 101620.6+410544.7 (RM) at ɀ_spec = 0.2782. The offset between the X–ray peak (blue cross) and the optical centre (white circle, in the right image), D = 2.63′, is due to contamination by AGN emission from a cluster galaxy member, the QSO FBQS J101616.8+410812. The X-ray emission is peaked on this QSO, while diffuse emission extends mainly to the South (resolved in the Swift image), coincident with the concentration of the WHL spectroscopic redshiſts of cluster members (blue octagons).