Per-trigger NS (left) and AS (right) associated peak yields for electrons from heavy-flavor hadron decays in the intervals $4 \pte 7$ \GeVc and $7 \pte 16$ \GeVc as a function of $\ptassoc$ in central Pb--Pb collisions, compared to measurements in pp collisions . The statistical (systematic) uncertainties are shown as vertical lines (empty boxes). In some $\ptassoc$ intervals the AS yield is consistent with zero within one standard deviation of total uncertainties. For those intervals, upper limits on the yields for 68\% and 95\% confidence levels are shown with arrows and boxes, respectively.