0.005 0.01 0.015 0.02 0.025 k ( ) (eV) 0.005 0.01 0.015 0.02 k ( ) (eV) −0.045 −0.04 −0.035 −0.03 −0.025 −0.02 −0.015 −0.01 −0.005 0.005 0.01 0.015 0.02 Binding Energy (eV) k ( ) (eV) b) c) a) FIG. 2. (Color online) Panels a-c show scattering rates Γ$_{⃗}$ $_{k}$( ω ) extracted directly f rom EDC’s of the spectra show n in Figure 1d-f, respect ively. The dotted lines denote the gap ener gy relative to the midpoint ste p energy. Red lines are fi ts to Eq. 1 with α $^{2}$=1.5, 1.1 and 1.2 includ ing resolution broadening, imp urity scattering and the ω kink = Δ$_{⃗}$ $_{k}$+Ω 0 dependence of the kink ene rgy. The inset of panel a diagrams the locations of cuts in the Brillouin zone. The gap values shown in panels a and c have been corrected for the finite energy resolution and kinematic effects, respectively. the order of 0.001 ˚ A − $^{1}$. As has been pointed out previously 10 ARPES spectra acquired with imaging analyzers such as the Scienta 2002 used in the present experiment suffer from a non-trivial finite III. EXPERIMENTAL ANALYSIS: THE LUCY-RICHARDSON DECONVOLU- TION 4