Explanipedia

Thermal testing for cryogenic CMB instrument optical design Open

D. C. Goldfinger, Peter A. R. Ade, Zeeshan Ahmed, M. Amiri, D. Barkats , et al. · 2022

Observations of the Cosmic Microwave Background rely on cryogenic instrumentation with cold detectors, readout, and optics providing the low noise performance and instrumental stability required to make more sensitive measurements. It is t…

Bicep/Keck XV: The Bicep3 Cosmic Microwave Background Polarimeter and the First Three-year Data Set Open

P. A. R. Ade, Zeeshan Ahmed, M. Amiri, D. Barkats, R. Basu Thakur , et al. · 2022

Physics

We report on the design and performance of the B icep3 instrument and its first three-year data set collected from 2016 to 2018. B icep3 is a 52 cm aperture refracting telescope designed to observe the polarization of the cosmic microwave …

Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model Open

J. Montgomery, Peter A. R. Ade, Zeeshan Ahmed, Ethan Anderes, Adam Anderson , et al. · 2022

Physics Computer science Engineering

The third-generation South Pole Telescope camera (SPT-3G) improves upon its predecessor (SPTpol) by an order of magnitude increase in detectors on the focal plane. The technology used to read out and control these detectors, digital freque…

Plastic Laminate Antireflective Coatings for Millimeter-wave Optics in BICEP Array Open

M. Dierickx, P. A. R. Ade, Zeeshan Ahmed, M. Amiri, D. Barkats , et al. · 2021

Materials science Physics

The BICEP/Keck series of experiments target the Cosmic Microwave Background at degree-scale resolution from the South Pole. Over the next few years, the "Stage-3" BICEP Array (BA) telescope will improve the program's frequency coverage and…

Measurements of the -mode polarization and temperature--mode correlation of the CMB from SPT-3G 2018 data Open

D. Dutcher, L. Balkenhol, P. A. R. Ade, Zeeshan Ahmed, Ethan Anderes , et al. · 2021

Mathematics

We present measurements of the $E$-mode ($EE$) polarization power spectrum\nand temperature-$E$-mode ($TE$) cross-power spectrum of the cosmic microwave\nbackground using data collected by SPT-3G, the latest instrument installed on\nthe So…

Polarization Calibration of the BICEP3 CMB polarimeter at the South Pole Open

J. Cornelison, P. A. R. Ade, Zeeshan Ahmed, M. Amiri, D. Barkats , et al. · 2020

Physics Chemistry

The BICEP3 CMB Polarimeter is a small-aperture refracting telescope located at the South Pole and is specifically designed to search for the possible signature of inflationary gravitational waves in the Cosmic Microwave Background (CMB). T…

Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment Open

Y. Chinone, S. Adachi, PAR Ade, Mario Aguilar, Y. Akiba , et al. · 2020

Physics Chemistry

P OLARBEAR is a Cosmic Microwave Background radiation (CMB) polarization experiment that is located in the Atacama Desert in Chile. The scientific goals of the experiment are to characterize the B -mode signal from gravitational lensing, a…

BICEP2/Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Data Set Open

P. A. R. Ade, Zeeshan Ahmed, R. W. Aikin, D. Barkats, S. J. Benton , et al. · 2019

Physics Economics Chemistry

Precision measurements of cosmic microwave background (CMB) polarization require extreme control of instrumental systematics. In a companion paper we have presented cosmological constraints from observations with the BICEP2 and Keck Array …

The C-Band All-Sky Survey (C-BASS): constraining diffuse Galactic radio emission in the North Celestial Pole region Open

C. Dickinson, A. Barr, H. C. Chiang, Charles Copley, R D P Grumitt , et al. · 2019

Physics

The C-Band All-Sky Survey (C-BASS) is a high sensitivity all-sky radio survey at an angular resolution of 45 arcmin and a frequency of 4.7 GHz. We present a total intensity map of the North Celestial Pole (NCP) region of sky, above declina…

Constraints on the Thermal Contents of the X-Ray Cavities of Cluster MS 0735.6+7421 with Sunyaev–Zel’dovich Effect Observations Open

Zubair Abdulla, J. E. Carlstrom, A. Mantz, Daniel P. Marrone, Christopher H. Greer , et al. · 2019

Physics Computer science

Outbursts from active galactic nuclei (AGN) can inflate cavities in the intracluster medium (ICM) of galaxy clusters and are believed to play the primary role in offsetting radiative cooling in the ICM. However, the details of how the ener…

Year two instrument status of the SPT-3G cosmic microwave background receiver Open

Faustin W. Carter, T. Cecil, C. L. Chang, Hsaio-Mei Cho, Jean-François Cliche , et al. · 2018

Physics Geology Chemistry

The South Pole Telescope (SPT) is a millimeter-wavelength telescope surveying the cosmic microwave background (CMB). The SPT measures both the temperature and polarization of the CMB with a large aperture, resulting in high-resolution maps…

The C-Band All-Sky Survey (C-BASS): design and capabilities Open

Michael E. Jones, Angela C. Taylor, Moumita Aich, Charles Copley, H. C. Chiang , et al. · 2018

Physics Geography Chemistry

The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarization survey at a frequency of 5 GHz, designed to provide complementary data to the all-sky surveys of WMAP and Planck, and future CMB B-mode polarization imaging surveys. The ob…

Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz Open

Ahmed Soliman, Steve J. Benton, Colin A. Bischoff, James J. Bock, E. Bullock , et al. · 2018

Physics Computer science Chemistry

BICEP Array is a degree-scale Cosmic Microwave Background (CMB) experiment that will search for primordial B-mode polarization while constraining Galactic foregrounds. BICEP Array will be comprised of four receivers to cover a broad freque…

BICEP Array: a multi-frequency degree-scale CMB polarimeter Open

H. Hui, P. A. R. Ade, Zeeshan Ahmed, R. Aikin, Kate D. Alexander , et al. · 2018

Physics Chemistry

Bicep Array is the newest multi-frequency instrument in the Bicep/Keck Array program. It is comprised of four 550mm aperture refractive telescopes observing the polarization of the cosmic microwave background (CMB) at 30/40, 95, 150 and 22…

A measurement of CMB cluster lensing with SPT and DES year 1 data Open

Eric J. Baxter, S. Raghunathan, T. M. Crawford, P. Fosalba, Z. Hou , et al. · 2018

Physics Computer science

Clusters of galaxies gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint in the CMB on arcminute scales. Measurement of this effect offers a promising way to constrain the masses of galaxy …

A Comparison of Cosmological Parameters Determined from CMB Temperature Power Spectra from the South Pole Telescope and the Planck Satellite Open

K. Aylor, Z. Hou, L. Knox, K. T. Story, B. A. Benson , et al. · 2017

Physics Mathematics

The Planck cosmic microwave background temperature data are best fit with a ΛCDM model that mildly contradicts constraints from other cosmological probes. The South Pole Telescope (SPT) 2540 SPT-SZ survey offers measurements on sub-degree …

BICEP2 / <i>Keck Array</i> IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields Open

P. A. R. Ade, Zeeshan Ahmed, R. W. Aikin, K. D. Alexander, D. Barkats , et al. · 2017

Physics Chemistry Mathematics

We present the strongest constraints to date on anisotropies of cosmic\nmicrowave background (CMB) polarization rotation derived from 150 GHz data\ntaken by the BICEP2/Keck Array CMB experiments up to and including the 2014\nobserving seas…

A Measurement of the Cosmic Microwave Background B-mode Polarization Power Spectrum at Subdegree Scales from Two Years of POLARBEAR Data Open

P. A. R. Ade, Mario Aguilar, Y. Akiba, Kam Arnold, C. Baccigalupi , et al. · 2017

Physics Chemistry Computer science

We report an improved measurement of the cosmic microwave background B-mode polarization power spectrum with the Polarbear experiment at 150 GHz. By adding new data collected during the second season of observations (2013-2014) to re-analy…

CMB Polarization B-mode Delensing with SPTpol and Herschel Open

A. Manzotti, K. T. Story, W. L. K. Wu, Jason E. Austermann, James A. Beall , et al. · 2017

Physics Computer science Chemistry

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 i…

Optimization of Transition Edge Sensor Arrays for Cosmic Microwave Background Observations With the South Pole Telescope Open

J. Ding, P. A. R. Ade, A. J. Anderson, J. S. Avva, Zeeshan Ahmed , et al. · 2016

Physics Materials science Chemistry

In this paper, we describe the optimization of transition-edge-sensor (TES) detector arrays for the third-generation camera for the South Pole Telescope. The camera, which contains ~16 000 detectors, will make high-angular-resolution maps …

COSMOLOGICAL CONSTRAINTS FROM GALAXY CLUSTERS IN THE 2500 SQUARE-DEGREE SPT-SZ SURVEY Open

T. de Haan, B. A. Benson, L. E. Bleem, S. W. Allen, Douglas Applegate , et al. · 2016

Physics

We present cosmological parameter constraints obtained from galaxy clusters identified by their Sunyaev–Zel’dovich effect signature in the 2500 square-degree South Pole Telescope Sunyaev Zel’dovich (SPT-SZ) survey. We consider the 377 clus…

SPT-GMOS: A GEMINI/GMOS-SOUTH SPECTROSCOPIC SURVEY OF GALAXY CLUSTERS IN THE SPT-SZ SURVEY Open

Matthew Bayliss, J. Ruel, C. W. Stubbs, S. W. Allen, Douglas Applegate , et al. · 2016

Physics Computer science

We present the results of SPT-GMOS, a spectroscopic survey with the Gemini Multi-Object Spectrograph (GMOS) on Gemini South. The targets of SPT-GMOS are galaxy clusters identified in the SPT-SZ survey, a millimeter-wave survey of 2500 deg …

MILLIMETER TRANSIENT POINT SOURCES IN THE SPTpol 100 SQUARE DEGREE SURVEY Open

N. Whitehorn, T. Natoli, P. A. R. Ade, Jason E. Austermann, James A. Beall , et al. · 2016

Environmental science Physics Mathematics

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), off…

SPT-GMOS: A Gemini/GMOS-South Spectroscopic Survey of Galaxy Clusters in the SPT-SZ Survey Open

Matthew Bayliss, J. Ruel, C. W. Stubbs, S. W. Allen, Douglas Applegate , et al. · 2016

Geography

We present the results of SPT-GMOS, a spectroscopic survey with the Gemini Multi-Object Spectrograph (GMOS) on Gemini South. The targets of SPT-GMOS are galaxy clusters identified in the SPT-SZ survey, a millimeter-wave survey of 2500 squ.…

Large arrays of dual-polarized multichroic TES detectors for CMB measurements with the SPT-3G receiver Open

C. M. Posada, P. A. R. Ade, A. J. Anderson, J. S. Avva, Zeeshan Ahmed , et al. · 2016

Physics Computer science Art

Detectors for cosmic microwave background (CMB) experiments are now essentially background limited, so a straightforward alternative to improve sensitivity is to increase the number of detectors. Large arrays of multichroic pixels constitu…

BICEP3 performance overview and planned Keck Array upgrade Open

J. Grayson, P. A. R. Ade, Zeeshan Ahmed, K. D. Alexander, M. Amiri , et al. · 2016

Physics Computer science Chemistry

Bicep3 is a 520mm aperture, compact two-lens refractor designed to observe the polarization of the cosmic microwave background (CMB) at 95 GHz. Its focal plane consists of modularized tiles of antenna-coupled transition edge sensors (TESs)…

BICEP2/KECK ARRAY. VII. MATRIX BASED E/B SEPARATION APPLIED TO BICEP2 AND THE KECK ARRAY Open

P. A. R. Ade, Zeeshan Ahmed, R. W. Aikin, K. D. Alexander, D. Barkats , et al. · 2016

Physics

A linear polarization field on the sphere can be uniquely decomposed into an E -mode and a B -mode component. These two components are analytically defined in terms of spin-2 spherical harmonics. Maps that contain filtered modes on a parti…

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