cosmomc: cmb_dataset_SZ parameters

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Adam Mantz
Posts: 6
Joined: December 07 2007
Affiliation: NASA/GSFC

cosmomc: cmb_dataset_SZ parameters

Post by Adam Mantz » May 05 2009

Does anyone know what cmb_dataset_SZ_scale should be set to for QuAD data (using the WMAP template)? i.e.

cmb_dataset = data/QuAD.newdat
cmb_dataset_SZ = data/WMAP_SZ_VBand.dat
cmb_dataset_SZ_scale = ???

Antony Lewis
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Joined: September 23 2004
Affiliation: University of Sussex
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Re: cosmomc: cmb_dataset_SZ parameters

Post by Antony Lewis » May 05 2009

The scale is used to scale the SZ template power spectrum (cmb_dataset_SZ) to the frequency actually being used in this dataset.

Adam Mantz
Posts: 6
Joined: December 07 2007
Affiliation: NASA/GSFC

cosmomc: cmb_dataset_SZ parameters

Post by Adam Mantz » May 28 2009

In case anyone else out there is wondering, Clem Pryke had this to say:

"The QUaD results we released are a combination of 100 GHz , 150 GHz and
frequency cross spectra. So the value you seek is basically undefined. However
if you use 150GHz you will not be too far wrong since this gets the largest
weight. And for ell<2000 the SZ contribution is not strong anyway."

Using the WMAP_SZ_VBand.dat template, the scale would then be ~0.28.

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