Four-year Cosmology Large Angular Scale Surveyor (CLASS) observations: on-sky receiver performance at 40, 90, 150, and 220 GHz frequency bands

S Dahal, JW Appel, R Datta, MK Brewer… - The Astrophysical …, 2022 - iopscience.iop.org
Abstract The Cosmology Large Angular Scale Surveyor (CLASS) observes the polarized
cosmic microwave background (CMB) over the angular scales of 1≲ θ≤ 90 with the aim of …

Two-year cosmology large angular scale surveyor (CLASS) observations: 40 GHz telescope pointing, beam profile, window function, and polarization performance

Z Xu, MK Brewer, PF Rojas, Y Li, K Osumi… - The Astrophysical …, 2020 - iopscience.iop.org
Abstract The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array that
observes the cosmic microwave background (CMB) over 75% of the sky from the Atacama …

CLASS Angular Power Spectra and Map-component Analysis for 40 GHz Observations through 2022

JR Eimer, Y Li, MK Brewer, R Shi, A Ali… - The Astrophysical …, 2024 - iopscience.iop.org
Measurement of the largest angular scale (ℓ< 30) features of the cosmic microwave
background (CMB) polarization is a powerful way to constrain the optical depth to …

Calibration of transition-edge sensor (TES) bolometer arrays with application to CLASS

JW Appel, CL Bennett, MK Brewer… - The Astrophysical …, 2022 - iopscience.iop.org
The current and future cosmic microwave background (CMB) experiments fielding kilopixel
arrays of transition-edge sensor (TES) bolometers require accurate and robust gain …

On-sky Performance of the CLASS Q-band Telescope

JW Appel, Z Xu, IL Padilla, K Harrington… - The Astrophysical …, 2019 - iopscience.iop.org
Abstract The Cosmology Large Angular Scale Surveyor (CLASS) is mapping the
polarization of the cosmic microwave background (CMB) at large angular scales (2< ℓ≲ 200) …

Cosmology Large Angular Scale Surveyor (CLASS): 90 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance

R Datta, MK Brewer, JD Couto… - The Astrophysical …, 2024 - editors.iopscience.iop.org
Abstract The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array that
observes the cosmic microwave background (CMB) over∼ 75% of the sky from the Atacama …

The cosmology large angular scale surveyor receiver design

J Iuliano, J Eimer, L Parker, G Rhoades… - … , and Far-Infrared …, 2018 - spiedigitallibrary.org
The Cosmology Large Angular Scale Surveyor consists of four instruments performing a
CMB polarization survey. Currently, the 40 GHz and first 90 GHz instruments are deployed …

Variable-delay polarization modulators for the CLASS telescopes

K Harrington, J Eimer, DT Chuss… - … , and Far-Infrared …, 2018 - spiedigitallibrary.org
The search for inflationary primordial gravitational waves and the measurement of the
optical depth to reionization, both through their imprint on the large angular scale …

On-sky performance of new 90 GHz detectors for the Cosmology Large Angular Scale Surveyor (CLASS)

C Núñez, JW Appel, MK Brewer… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
The Cosmology Large Angular Scale Surveyor (CLASS) is a polarization-sensitive
telescope array located at an altitude of 5,200 m in the Chilean Atacama Desert and …

[HTML][HTML] SiAl composite feedhorn arrays for astrophysical applications: Cryogenic material properties

AM Ali, T Essinger-Hileman, T Marriage… - Review of Scientific …, 2022 - pubs.aip.org
A study investigating the physical properties and use of the SiAl composite Controlled
Expansion 7 (CE7) for the packaging of silicon bolometric detectors for millimeter-wave …