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 …

Small aperture telescopes for the Simons Observatory

AM Ali, S Adachi, K Arnold, P Ashton, A Bazarko… - Journal of Low …, 2020 - Springer
Abstract The Simons Observatory (SO) is an upcoming cosmic microwave background
(CMB) experiment located on Cerro Toco, Chile, that will map the microwave sky in …

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 …

The Simons Observatory: metamaterial microwave absorber (MMA) and its cryogenic applications

Z Xu, GE Chesmore, S Adachi, AM Ali… - arXiv preprint arXiv …, 2020 - arxiv.org
Controlling stray light at millimeter wavelengths requires special optical design and
selection of absorptive materials that should be compatible with cryogenic operating …

CLASS Data Pipeline and Maps for 40 GHz Observations through 2022

Y Li, JR Eimer, K Osumi, JW Appel… - The Astrophysical …, 2023 - iopscience.iop.org
Abstract The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array that
observes the cosmic microwave background over 75% of the sky from the Atacama Desert …

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) …

Simons observatory: broadband metamaterial antireflection cuttings for large-aperture alumina optics

JE Golec, S Sutariya, R Jackson, J Zimmerman… - Applied Optics, 2022 - opg.optica.org
We present the design, fabrication, and measured performance of metamaterial
antireflection cuttings (ARCs) for large-format alumina filters operating over more than an …

Large and small field inflation from hyperbolic sigma models

R Schimmrigk - Physical Review D, 2022 - APS
Long standing themes in inflation include the issue of large field vs. small field inflation as
well as the question what fraction of phase space leads to sufficient inflation and furthermore …

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

R Datta, MK Brewer, JD Couto, J Eimer… - The Astrophysical …, 2024 - 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 …