# Measurements of E-Mode Polarization and Temperature-E-Mode Correlation in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data

Source: [Measurements of E-Mode Polarization and Temperature-E-Mode Correlation in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data](<https://www.sota2.com/research/paper/68fa2f961e209131ce86da74>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T17:40:11.368Z

Authors: A. T. Crites, J. W. Henning, P. A. R. Ade, K. A. Aird, J. E. Austermann, J. A. Beall, A. N. Bender, B. A. Benson, L. E. Bleem, J. E. Carstrom, C. L. Chang, H. C. Chiang, H-M. Cho, R. Citron, T. M. Crawford, T. De Haan, M. A. Dobbs, W. Everett, J Gallicchio, J. Gao, E. M. George, A. Gilbert, N. W. Halverson, D. Hanson, N. Harrington, G. C. Hilton, G. P. Holder, W. L. Holzapfel, S. Hoover, Z. Hou, J. D. Hrubes, N. Huang, J. Hubmayr, K. D. Irwin, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, D. Li, C. Liang, D. Luong-Van, J. J. McMahon, J. Mehl, S. S. Meyer, L. Mocanu, T. E. Montroy, T. Natoli, J. P. Nibarger, V. Novosad, S. Padin, C. Pryke, C. L. Reichardt, J. E. Ruhl, B. R. Saliwanchik, J.T. Sayre, K. K. Schaffer, G. Smecher, A. A. Stark, K.T. Story, C. Tucker, K. Vanderlinde, J. D. Vieira, G. Wang, N. Whitehorn, V. Yefremenko, O. Zahn

Published: 2014-11-04T20:52:04.000Z

## Abstract

We present measurements of $E$-mode polarization and temperature-$E$-mode correlation in the cosmic microwave background (CMB) using data from the first season of observations with SPTpol, the polarization-sensitive receiver currently installed on the South Pole Telescope (SPT). The observations used in this work cover 100~\\sqdeg\\ of sky with arcminute resolution at $150\\,$GHz. We report the $E$-mode angular auto-power spectrum ($EE$) and the temperature-$E$-mode angular cross-power spectrum ($TE$) over the multipole range $500 \< \\ell \\leq5000$. These power spectra improve on previous measurements in the high-$\\ell$ (small-scale) regime. We fit the combination of the SPTpol power spectra, data from \\planck\\, and previous SPT measurements with a six-parameter \\LCDM cosmological model. We find that the best-fit parameters are consistent with previous results. The improvement in high-$\\ell$ sensitivity over previous measurements leads to a significant improvement in the limit on polarized point-source power: after masking sources brighter than 50\\,mJy in unpolarized flux at 150\\,GHz, we find a 95\\% confidence upper limit on unclustered point-source power in the $EE$ spectrum of $D\_\\ell = \\ell (\\ell+1) C\_\\ell / 2 \\pi \< 0.40 \\ \\mu{\\mbox{K}}^2$ at $\\ell=3000$, indicating that future $EE$ measurements will not be limited by power from unclustered point sources in the multipole range $\\ell \< 3600$, and possibly much higher in $\\ell.$

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1411.1042>)

[PDF](<https://arxiv.org/pdf/1411.1042.pdf>)