Binned skew-C_ℓ statistics from the SMICA map for a) ISW-lensing and b) Poisson point sources. Theoretical curves are not fitted to the data shown, but are plotted with the amplitude (the only free parameter) determined from the KSW technique. The Poisson point-source foreground is clearly detected, and the ISW-lensing skew-spectrum is evident and consistent with the overall 2.6σ detection. b_ps is the Poisson point-source amplitude in dimensionless units of 10^-29, and is the ISW-lensing amplitude in units of that expected from the Planck best-fit cosmology. Error bars come from covariance estimates from 1000 simulated maps, and the points are mildly correlated.