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arXiv · 1904.12995

Consistency of cosmic microwave background temperature measurements in three frequency bands in the 2500-square-degree SPT-SZ survey

L. M. Mocanu·T. M. Crawford·K. Aylor·B. A. Benson·L. E. Bleem·J. E. Carlstrom·C. L. Chang·H-M. Cho·R. Chown·A. T. Crites·T. de Haan·M. A. Dobbs·W. B. Everett·E. M. George·N. W. Halverson·N. L. Harrington·J. W. Henning·G. P. Holder·W. L. Holzapfel·Z. Hou·J. D. Hrubes·L. Knox·A. T. Lee·D. Luong-Van·D. P. Marrone·J. J. McMahon·S. S. Meyer·M. Millea·J. J. Mohr·T. Natoli·Y. Omori·S. Padin·C. Pryke·C. L. Reichardt·J. E. Ruhl·J. T. Sayre·K. K. Schaffer·E. Shirokoff·Z. Staniszewski·A. A. Stark·K. T. Story·K. Vanderlinde·J. D. Vieira·R. Williamson·W. L. K. Wu
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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 deg^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 chi-squared value of 236.3 for 235 degrees of freedom, and the probability to exceed this chi-squared value is 46%.

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L. M. Mocanu, T. M. Crawford, K. Aylor, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H-M. Cho, R. Chown, A. T. Crites, T. de Haan, M. A. Dobbs, W. B. Everett, E. M. George, N. W. Halverson, N. L. Harrington, J. W. Henning, G. P. Holder, W. L. Holzapfel, Z. Hou, J. D. Hrubes, L. Knox, A. T. Lee, D. Luong-Van, D. P. Marrone, J. J. McMahon, S. S. Meyer, M. Millea, J. J. Mohr, T. Natoli, Y. Omori, S. Padin, C. Pryke, C. L. Reichardt, J. E. Ruhl, J. T. Sayre, K. K. Schaffer, E. Shirokoff, Z. Staniszewski, A. A. Stark, K. T. Story, K. Vanderlinde, J. D. Vieira, R. Williamson, W. L. K. Wu. 2019-04-30. Consistency of cosmic microwave background temperature measurements in three frequency bands in the 2500-square-degree SPT-SZ survey. https://doi.org/10.1088/1475-7516%2F2019%2F07%2F038

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