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

Mocanu, L.M.; Crawford, T.M.; Aylor, K.; Benson, B.A.; Bleem, L.E.; Carlstrom, J.E.; Chang, C.L.; Cho, H.-M.; Chown, R.; Crites, A.T.; de Haan, T.; Dobbs, M.A.; Everett, W.B.; George, E.M.; Halverson, N.W.; Harrington, N.L.; Henning, J.W.; Holder, G.P.; Holzapfel, W.L.; Hou, Z.; Hrubes, J.D.; Knox, L.; Lee, A.T.; Luong-Van, D.; Marrone, D.P.; McMahon, J.J.; Meyer, S.S.; Millea, M.; Mohr, J. J.; Natoli, T.; Omori, Y.; Padin, S.; Pryke, C.; Reichardt, C.L.; Ruhl, J.E.; Sayre, J.T.; Schaffer, K.K.; Shirokoff, E.; Staniszewski, Z.; Stark, A.A.; Story, K.T.; Vanderlinde, K.; Vieira, J.D.; Williamson, R.; Wu, W.L.K.

doi:10.1088/1475-7516/2019/07/038

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

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Mohr, J. J.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Zitation

Mocanu, L., Crawford, T., Aylor, K., Benson, B., Bleem, L., Carlstrom, J., et al. (2019). Consistency of cosmic microwave background temperature measurements in three frequency bands in the 2500-square-degree SPT-SZ survey. Journal of Cosmology and Astroparticle Physics, 2019(7): 038. doi:10.1088/1475-7516/2019/07/038.

Zitierlink: https://hdl.handle.net/21.11116/0000-0005-1008-0

Zusammenfassung

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 χ² value of 236.3 for 235 degrees of freedom, and the probability to exceed this χ² value is 46%.