Cosmomc: ACBAR and CBI

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Loison Hoi
Posts: 23
Joined: February 21 2006
Affiliation: McGill University

Cosmomc: ACBAR and CBI

Post by Loison Hoi » June 18 2006

Hi Antony,

I am trying to use the full data of ACBAR and CBI, i.e. including the data points that are not considered by default. But I have some questions.

ACBAR: I did not find the values in the last column of ACBAR_lge800_.dataset, beam uncertainty, in the ACBAR's paper or in its website. How can I obtain these values for data points that are not listed in ACBAR_lge800_.dataset? Also, how would the value calib_uncertainty=0.2 change?

CBI: The bandpower covariance matrix provided by the CBI website is quite different from yours, CBI2.0_2to14_matrix.dat. Can I use their covariance matrix without changing the code, or how can I obtain the correct covariance martrix for the full CBI data? Again, would the value of calib_uncertainty=0.026 change?

Thanks a lot!

Loison Hoi
18 Jun 2006

Antony Lewis
Posts: 1498
Joined: September 23 2004
Affiliation: University of Sussex
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Re: Cosmomc: ACBAR and CBI

Post by Antony Lewis » June 18 2006

The ACBAR data is at

http://cosmology.berkeley.edu/group/swl ... index.html

CBI at

http://www.astro.caltech.edu/~tjp/CBI/d ... index.html

I think for the covariance matrix you just have to de-normalize their table.

I don't see why the calibration uncertainty would change.

Loison Hoi
Posts: 23
Joined: February 21 2006
Affiliation: McGill University

Cosmomc: ACBAR and CBI

Post by Loison Hoi » June 20 2006

Hi Antony,

Thanks for your help, but

1. For the values of column "beam ncertainty" in ACBAR_lge800_.dataset, I just didn't find them in ACBAR's website and in its paper. Where are they?

2. For the covariance matrix of CBI, given a normalized matrix (as given in CBI's website), how to de-normalize it into cosmomc's format? I am sorry if this question is stupid.

Thank you.

Loison Hoi
19 Jun 2006

Loison Hoi
Posts: 23
Joined: February 21 2006
Affiliation: McGill University

Cosmomc: ACBAR and CBI

Post by Loison Hoi » June 22 2006

Hi All,

Has anyone tried to incorporate the CBI deep (astro-ph/0205384) and mosaic (astro-ph/0205388) data into cosmomc? The bandpowers and their uncertainty can be found in CBI's website, http://www.astro.caltech.edu/~tjp/CBI/data/index.html. The noise power spectra can be found in the figures of their papers; however, they are not tabulated. Does anyone have the tabulated values? Also, I am wondering what the values of the calib_uncertainty (as in CBI2.0_lge600.dataset) are for the CBI deep and mosaic. Finally, I will appreciate if anyone could give me a hint how to convert the covariance matrixs in the CBI website into the cosmomc format.

Thanks!

Loison Hoi
22 Jun 2006

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