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Sara M. Simon

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Review Sep 2026

The Simons Observatory: Commissioning of the Mid-Frequency Small Aperture Telescopes

The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment observing from an altitude of 5,200 m in the Atacama Desert in Chile. The SO Small Aperture Telescopes (SATs) will cover six spectral bands between 30 and 280 GHz primarily to search for evidence of primordial gravitational waves in th...

K. Harrington, R. Gerras, N. Galitzki et al. · 1 citation
Preprint Oct 2026

The Simons Observatory: Frequency-resolved beam calibration for the SO SATs with POLOCALC

We present a far-field beam calibration of the Simons Observatory (SO) Small Aperture Telescopes (SATs) using scanned single-frequency measurements of a drone-mounted source emitting in the 90 GHz band, where the SATs have an angular resolution of $\sim$30$'$. We then compare the results from two campaigns in April and...

N. Dachlythra, G. Coppi, Ludovico Bizzarri et al. · 0 citations
Review Aug 2026

Sensitivity of Next-Generation CMB Surveys to Neutrinos and Other Light Relics

Neutrinos and other light relics leave characteristic imprints in the cosmic microwave background anisotropies, making their observation a sensitive probe of the particle content and thermal history of the early universe. The energy density in these relativistic species is parameterized by their effective number $N_\ma...

C. Trendafilova, Srinivasan Raghunathan, B. Wallisch et al. · 3 citations

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