Multi-tracer CMB Delensing Maps from Planck and WISE Data

We provide optimally combined multi-tracer delensing maps constructed
from Planck and Wide-field Infrared Survey Explorer (WISE) data. The
maps cover about 43% of the sky. They can be used as tracers of the
CMB lensing convergence field for the purpose of delensing CMB
temperature and polarization maps, so as to improve constraints on the
tensor-to-scalar ratio and other cosmological parameters.

The methodology is described
in Yu, Hill, and Sherwin (2017).

The maps are provided in HEALPix format (these are
FITS files at HEALPix resolution Nside=2048 / RING ordering / Galactic
coordinates) under the condition that you cite the above paper when using these maps in any scientific analyses.

We provide maps constructed with or without the Planck 2015 lensing
convergence map (i.e., CIB + WISE + Planck lens or CIB +
WISE), as the noise properties of the CIB + WISE map should be
essentially independent of the CMB (modulo small residuals in the CIB map), whereas the Planck lensing noise
is not. However, inclusion of the Planck lensing map leads to a more
optimal delensing tracer, particularly on large angular scales (note
the band-limits of the maps below).

Data products:

CIB + WISE + Planck lensing convergence map (band-limited to L=[8, 2007]) --- imageCIB + WISE map (band-limited to L = [108, 2007]) --- image

mask (unapodized)

mask (apodized with a gaussian taper of FWHM=30 arcmin)

extended mask (extended by 30 arcmin at all edges)

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contact: jch2200 at columbia dot edu

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