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SouthPole Site
Observing & Analysis
SPT Team
News & Publications
Internal pages

Project Supported by

NSF, National Science Foundation

KICP, Kavli Institute for Cosmological Physics

USAP, United States Antarctic Program

Antarctic Support Contract

Related Websites

CBI, Cosmic Background Imager

DASI, Degree Angular Scale Interferometer

WMAP, Wilkinson Microwave Anisotropy Probe

Likelihood Code



This page provides data products associated with the SPTpol measurement of the CMB BB polarization power spectra over 500 square degrees described in arXiv:1910.05748, Sayre et al., 2019. The power spectra are presented over the multipole range 52 < ell <= 2301 and can be used to constrain cosmological models using the likelihood package provided below.

If you have any questions regarding this data set or its use, please contact Christian Reichardt (christian_dot_reichardt_at_unimelb_dot_edu_dot_au).




Individual figures are available in PDF format here or bundled in a tarballe here. We highlight some figures below.

The SPTpol 500 square-degree BB polarization maps at 95 GHz (top) and 150 GHz(bottom). (Figure 1 in Sayre et al., 2019)

The SPTpol BB power spectrum, along with measurements from several other experiments. The bandpower errors shown do not include beam or calibration uncertainties. (Figure 2 in Sayre et al., 2019)


Bandpowers for plotting


We provide a text file with the combined bandpowers for plotting here.


Likelihood Code


We provide files in a gzipped tarball here that can be added to the Jul19 version of CosmoMC to interface with the SPTpol BB bandpowers discussed above. These files include the SPTpol likelihood, SPTpol data (bandpowers, covariance matrix, bandpower window functions, and beam error eigenvectors), batch file, and a README with instructions for how to compile CosmoMC with the SPTpol likelihood.

If you have any questions regarding the use of this likelihood, please contact Christian Reichardt (christian_dot_reichardt_at_unimelb_dot_edu_dot_au).

v2.0: Nov 8, 2019 - Previous version had wrong bandpower file (numbers didn't match paper). Thank you to Hua Zhai for noticing this. Also fixed a typo in the ini file pointed out by Pavel Motloch.
v1.0: Oct 11, 2019 - Initial version released with arXiv submission.

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Last update:


November 3, 2014