Completeness of the performed source detection in I_Ebased on artificial GC tests. Our assessment shows that the GC detection is 80% complete at I_E = 26.7 (without considering the extinction). This magnitude is roughly the expected location of GCLF TOM for dwarf galaxies at the distance of the Perseus cluster (72 Mpc) (when taking into account the average Galactic foreground dust extinction A_IE = 0.2 mag).