J. A. Brevik
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View article: BICEP2/Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Data Set
BICEP2/Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Data Set Open
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 …
View article: BICEP Array cryostat and mount design
BICEP Array cryostat and mount design Open
Bicep Array is a cosmic microwave background (CMB) polarization experiment that will begin observing at the South Pole in early 2019. This experiment replaces the five Bicep2 style receivers that compose the Keck Array with four larger Bic…
View article: Ultra-Thin Large-Aperture Vacuum Windows for Millimeter Wavelengths Receivers
Ultra-Thin Large-Aperture Vacuum Windows for Millimeter Wavelengths Receivers Open
Targeting faint polarization patterns arising from Primordial Gravitational Waves in the Cosmic Microwave Background requires excellent observational sensitivity. Optical elements in small aperture experiments such as Bicep3 and Keck Array…
View article: Measurements of Degree-Scale B-mode Polarization with the BICEP/Keck Experiments at South Pole
Measurements of Degree-Scale B-mode Polarization with the BICEP/Keck Experiments at South Pole Open
The BICEP and Keck Array experiments are a suite of small-aperture refracting telescopes observing the microwave sky from the South Pole. They target the degree-scale B-mode polarization signal imprinted in the Cosmic Microwave Background …
View article: BICEP2 / <i>Keck Array</i> IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields
BICEP2 / <i>Keck Array</i> IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields Open
We present the strongest constraints to date on anisotropies of cosmic microwave background (CMB) polarization rotation derived from 150 GHz data taken by the BICEP2 & Keck Array CMB experiments up to and including the 2014 observing seaso…
View article: BICEP2/KECK ARRAY. VII. MATRIX BASED E/B SEPARATION APPLIED TO BICEP2 AND THE KECK ARRAY
BICEP2/KECK ARRAY. VII. MATRIX BASED E/B SEPARATION APPLIED TO BICEP2 AND THE KECK ARRAY Open
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…
View article: Improved Constraints on Cosmology and Foregrounds from BICEP2 and Keck Array Cosmic Microwave Background Data with Inclusion of 95 GHz Band
Improved Constraints on Cosmology and Foregrounds from BICEP2 and Keck Array Cosmic Microwave Background Data with Inclusion of 95 GHz Band Open
We present results from an analysis of all data taken by the BICEP2 and Keck Array cosmic microwave background (CMB) polarization experiments up to and including the 2014 observing season. This includes the first Keck Array observations at…