Quality control for association J8HBBOKQ I: the detection image and the co-added grism image (left side); statistical analysis of the object parameters from the detection list (right side). The upper left panel shows the object size, the upper right panel the stellarity parameter s2 (Pirzkal et al. 2009) and the lower right panel the central surface brightness as a function of object brightness. The solid and dotted lines mark the exact locus of point-like objects and the enclosing tolerance area, respectively.