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[ascl:2410.010] lensitbiases: rFFT-based flat-sky CMB lensing tools

lensitbiases is an rFFT-based N1 lensing bias calculation and tests. It is tuned for TT, P-only or MV (GMV) like quadratic estimators. It performs rFFT-based N1 and N1 matrix calculations in ~ O(ms) time per lensing multipole for Planck-like config, which allows on-the-fly evaluation of the bias. It also calculates 5 rFFT's of moderate size per L for N1 TT, 20 for PP, and 45 for MV or GMV. lensitbiases is not particularly efficient for low lensing L's, since in this case one must use large boxes.

Code site:
https://github.com/NextGenCMB/lensitbiases
Used in:
https://ui.adsabs.harvard.edu/abs/2022JCAP...09..039C
Bibcode:
2024ascl.soft10010C

Views: 161

ascl:2410.010
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