## Abstract

We present an internal consistency test of South Pole Telescope (SPT) measurements of the cosmic microwave background (CMB) temperature anisotropy using three-band data from the SPT-SZ survey. These measurements are made from observations of ∼ 2500 °^{2} of sky in three frequency bands centered at 95, 150, and 220 GHz. We combine the information from these three bands into six semi-independent estimates of the CMB power spectrum (three single-frequency power spectra and three cross-frequency spectra) over the multipole range 650<ℓ<3000. We subtract an estimate of foreground power from each power spectrum and evaluate the consistency among the resulting CMB-only spectra. We determine that the six foreground-cleaned power spectra are consistent with the null hypothesis, in which the six cleaned spectra contain only CMB power and noise. A fit of the data to this model results in a χ^{2} value of 236.3 for 235 degrees of freedom, and the probability to exceed this χ^{2} value is 46%.

Original language | English (US) |
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Article number | 038 |

Journal | Journal of Cosmology and Astroparticle Physics |

Volume | 2019 |

Issue number | 7 |

DOIs | |

State | Published - Jul 24 2019 |

### Bibliographical note

Publisher Copyright:© 2019 IOP Publishing Ltd and Sissa Medialab.

## Keywords

- CMBR experiments
- cosmological parameters from CMBR