A foreground-robust CMB lensing B-mode template combining SPT-3G lensing reconstructions with a Planck CIB tracer achieves residual lensing amplitude 0.48 over ell=20-200, the best delensing efficiency reported to date.
We obtain these auto- and cross-spectra by fitting to the measured CIB auto-spectrum and CIB-κcross-spectrum, as discussed in the previous section
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SPT-3G D1: Foreground-Robust Lensing Templates for Primordial Gravitational Wave Searches
A foreground-robust CMB lensing B-mode template combining SPT-3G lensing reconstructions with a Planck CIB tracer achieves residual lensing amplitude 0.48 over ell=20-200, the best delensing efficiency reported to date.