MEASUREMENTS OF SUB-DEGREE<i>B</i>-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

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

doi:10.1088/0004-637x/807/2/151

Cited by 130 publications

(127 citation statements)

References 47 publications

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“…Using a multi-epoch likelihood method, we examine these maps for sources present for periods of time significantly shorter than the one year survey period. This field is shared with recent SPTpol cosmology analyses (e.g., Keisler et al 2015) and is well out of the Galactic plane.…”

Section: Survey Methodssupporting

confidence: 62%

“…We use observation quality criteria nearly identical to those of Keisler et al (2015). These criteria remove observations of the field with elevated or non-Gaussian noise, as well as periods with abnormally low observing efficiency due, for example, to telescope maintenance or hardware problems.…”

Section: Data Selectionmentioning

confidence: 99%

“…As atmospheric foregrounds are unpolarized and instrumental polarization leakage is low (Keisler et al 2015), the detection of a polarization fraction f p >0 can be taken as independent a posteriori evidence for an astrophysical source. Using Monte Carlo simulations, we would have expected to have a polarization   D 2 13 by chance in these data, given the observed intensity curve in 1.5% of cases.…”

Section: Candidate Objectmentioning

confidence: 99%

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MILLIMETER TRANSIENT POINT SOURCES IN THE SPTpol 100 SQUARE DEGREE SURVEY

Whitehorn

Natoli

Ade

et al. 2016

ApJ

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The millimeter transient sky is largely unexplored, with measurements limited to follow-up of objects detected at other wavelengths. High-angular-resolution telescopes, designed for measurement of the cosmic microwave background (CMB), offer the possibility to discover new, unknown transient sources in this band-particularly the afterglows of unobserved gamma-ray bursts (GRBs). Here, we use the 10 m millimeter-wave South Pole Telescope, designed for the primary purpose of observing the CMB at arcminute and larger angular scales, to conduct a search for such objects. During the 2012-2013 season, the telescope was used to continuously observe a 100 deg 2 patch of sky centered at R.A. 23 h 30 m and decl. −55°using the polarization-sensitive SPTpol camera in two bands centered at 95 and 150 GHz. These 6000 hr of observations provided continuous monitoring for day-to month-scale millimeter-wave transient sources at the 10 mJy level. One candidate object was observed with properties broadly consistent with a GRB afterglow, but at a statistical significance too low (p = 0.01) to confirm detection.

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Section: Survey Methodssupporting

confidence: 62%

Section: Data Selectionmentioning

confidence: 99%

Section: Candidate Objectmentioning

confidence: 99%

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MILLIMETER TRANSIENT POINT SOURCES IN THE SPTpol 100 SQUARE DEGREE SURVEY

Whitehorn

Natoli

Ade

et al. 2016

ApJ

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“…Forming maps from detector time streams follows the same procedures discussed in C15 and Keisler et al (2015), which are similar to those described in Couchot et al (1999) and Jones et al (2007). We review the process here.…”

Section: Mapsmentioning

confidence: 99%

Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data

Henning

Sayre

Reichardt

et al. 2018

ApJ

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264

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We present measurements of the E-mode polarization angular auto-power spectrum (EE) and temperature-E-mode cross-power spectrum (TE) of the cosmic microwave background (CMB) using 150 GHz data from three seasons of SPTpol observations. We report the power spectra over the spherical harmonic multipole range ℓ 50 8000  < and detect nine acoustic peaks in the EE spectrum with high signal-to-noise ratio. These measurements are the most sensitive to date of the EE and TE power spectra at ℓ 1050 > and ℓ 1475 > , respectively. The observations cover 500 deg 2 , a fivefold increase in area compared to previous SPTpol analyses, which increases our sensitivity to the photon diffusion damping tail of the CMB power spectra enabling tighter constraints on ΛCDM model extensions. After masking all sources with unpolarized flux 50 > mJy, we place a 95% confidence upper limit on residual polarized point-source power of D ℓ ℓ C 1 2 0.107 K ℓ ℓ 2 p m = + < ( ) at ℓ 3000 = , suggesting that the EE damping

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“…Lensing B modes were first detected with SPTpol in cross-correlation with LSS (Hanson et al 2013) and several subsequent detections have been made (POLARBEAR Collaboration 2014b;van Engelen et al 2015;Planck Collaboration et al 2016b). The (lensing) B-mode auto-spectrum has also now been detected (POLARBEAR Collaboration 2014a; BICEP2 Collaboration 2014; Keisler et al 2015).…”

Section: Introductionmentioning

confidence: 99%

CMB Polarization B-mode Delensing with SPTpol and Herschel

Manzotti

Story

et al. 2017

ApJ

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We present a demonstration of delensing the observed cosmic microwave background (CMB) B-mode polarization anisotropy. This process of reducing the gravitational-lensing-generated B-mode component will become increasingly important for improving searches for the B modes produced by primordial gravitational waves. In this work, we delens B-mode maps constructed from multi-frequency SPTpol observations of a 90 deg 2 patch of sky by subtracting a B-mode template constructed from two inputs: SPTpol E-mode maps and a lensing potential map estimated from the Herschel 500 μm map of the cosmic infrared background. We find that our delensing procedure reduces the measured B-mode power spectrum by 28% in the multipole range < < ℓ 300 2300; this is shown to be consistent with expectations from simulations and to be robust against systematics. The null hypothesis of no delensing is rejected at s 6.9 . Furthermore, we build and use a suite of realistic simulations to study the general properties of the delensing process and find that the delensing efficiency achieved in this work is limited primarily by the noise in the lensing potential map. We demonstrate the importance of including realistic experimental nonidealities in the delensing forecasts used to inform instrument and survey-strategy planning of upcoming lowernoise experiments, such as CMB-S4.

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MEASUREMENTS OF SUB-DEGREEB-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

Cited by 130 publications

References 47 publications

MILLIMETER TRANSIENT POINT SOURCES IN THE SPTpol 100 SQUARE DEGREE SURVEY

MILLIMETER TRANSIENT POINT SOURCES IN THE SPTpol 100 SQUARE DEGREE SURVEY

Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data

CMB Polarization B-mode Delensing with SPTpol and Herschel

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