cmb
5 posts
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PySM: produce CAR output at the smoothing stage
PySM 3 only builds HEALPix skies. Here is how to produce CAR pixelization output at the smoothing stage with a single spherical harmonic transform, and a validation against the smooth-then-reproject route.
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healpy 1.20.0b1 beta — harmonic_ud_grade for artifact-safe map downgrading
pip install --pre healpy==1.20.0b1 harmonicudgrade changes map NSIDE through spherical-harmonic transforms with pixel-window and beam transfer corrections following Eq. 1 of Planck 2015 X (arXiv:1502.01588).
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healpy harmonic_ud_grade vs skytools change_resolution: A Comparison
A comparison of healpy.harmonic_ud_grade and skytools.change_resolution for HEALPix map resolution changes, highlighting API differences, beam/pixel-window support, direct alm input, and agreement levels.
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BK18 added to Panexp model suite and new WebSky radio source models in PySM 3.4.1
Following up on my previous post about Panexp model suite simulations, there have been several important updates: BK18 Simulation Now Available
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New simulations of the Panexp model suite for Planck and WMAP
Following up on my recent post about PySM models for Galactic emission, I have recently executed three new simulations of the Panexp model suite: