Trigger rejection factors for the EMCal-L1 $\gamma$ (low) (green), EMCal-L1 $\gamma$ (high) (cyan) and the PHOS-PHI7 (red) trigger as a function of the cluster energy. The dip in the EMCal-L1 $\gamma$ (high)/EMCal-L1 $\gamma$ (low) ratio arises due to the trigger turn-on of the EMCal-L1 $\gamma$ (low) trigger of about $4$cGeV as explained in Sec.3.