The Simons Observatory: Beam Characterization for the Small Aperture Telescopes
Abstract We use time-domain simulations of Jupiter observations to test and develop a beam reconstruction pipeline for the Simons Observatory Small Aperture Telescopes. The method relies on a mapmaker that estimates and subtracts correlated atmospheric noise and a beam fitting code designed to compe...
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Published in | The Astrophysical journal Vol. 961; no. 1; pp. 138 - 156 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English Norwegian |
Published |
Philadelphia
The American Astronomical Society
01.01.2024
IOP Publishing American Astronomical Society |
Subjects | |
Online Access | Get full text |
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Summary: | Abstract
We use time-domain simulations of Jupiter observations to test and develop a beam reconstruction pipeline for the Simons Observatory Small Aperture Telescopes. The method relies on a mapmaker that estimates and subtracts correlated atmospheric noise and a beam fitting code designed to compensate for the bias caused by the mapmaker. We test our reconstruction performance for four different frequency bands against various algorithmic parameters, atmospheric conditions, and input beams. We additionally show the reconstruction quality as a function of the number of available observations and investigate how different calibration strategies affect the beam uncertainty. For all of the cases considered, we find good agreement between the fitted results and the input beam model within an ∼1.5% error for a multipole range
ℓ
= 30–700 and an ∼0.5% error for a multipole range
ℓ
= 50–200. We conclude by using a harmonic-domain component separation algorithm to verify that the beam reconstruction errors and biases observed in our analysis do not significantly bias the Simons Observatory
r
-measurement |
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Bibliography: | AAS46485 Laboratory Astrophysics, Instrumentation, Software, and Data USDOE |
ISSN: | 0004-637X 1538-4357 1538-4357 |
DOI: | 10.3847/1538-4357/ad0969 |