Exactly Azimuthal Pixelizations of the Sky

Details Exactly Azimuthal Pixelizations of the Sky Exactly Azimuthal Pixelizations of the Sky

1998-06-29

arxiv.org/abs/astro-ph/9806374v1

Astronomy and Astrophysics

Astrophysics

17 pages, 10 postscript figures

Scientific paper

We investigate various pixelizations of the sky which allow for fast spherical transforms, for implementation in full sky CMB experiments such as Planck and MAP. We study the effect of varying pixel shape and area on the extraction of the CMB power spectrum. We argue for the benefits of having a truly azimuthal, or `igloo' pixelization. Such pixelizations are simple and allow for fast, exact simulations of pixelized skies. They also allow for precise correction to be made which accounts for the effects of pixel smoothing on extracted multipole moments.

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