The Simons Observatory: Beam Characterization for the Small Aperture Telescopes

Nadia Dachlythra; Adriaan J. Duivenvoorden; Jon E. Gudmundsson; Matthew Hasselfield; Gabriele Coppi; Alexandre E. Adler; David Alonso; Susanna Azzoni; Grace E. Chesmore; Giulio Fabbian; Ken Ganga; Remington G. Gerras; Andrew H. Jaffe; Bradley R. Johnson; Brian Keating; Reijo Keskitalo; Theodore S. Kisner; Nicoletta Krachmalnicoff; Marius Lungu; Frederick Matsuda; Sigurd Naess; Lyman Page; Roberto Puddu; Giuseppe Puglisi; Sara M. Simon; Grant Teply; Tran Tsan; Edward J. Wollack; Kevin Wolz; Zhilei Xu

doi:10.3847/1538-4357/ad0969

The Simons Observatory: Beam Characterization for the Small Aperture Telescopes

Nadia Dachlythra, Adriaan J. Duivenvoorden, Jon E. Gudmundsson, Matthew Hasselfield, Gabriele Coppi, Alexandre E. Adler, David Alonso, Susanna Azzoni, Grace E. Chesmore, Giulio Fabbian, Ken Ganga, Remington G. Gerras, Andrew H. Jaffe, Bradley R. Johnson, Brian Keating, Reijo Keskitalo, Theodore S. Kisner, Nicoletta Krachmalnicoff, Marius Lungu, Frederick MatsudaSigurd Naess, Lyman Page, Roberto Puddu, Giuseppe Puglisi, Sara M. Simon, Grant Teply, Tran Tsan, Edward J. Wollack, Kevin Wolz, Zhilei Xu

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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.

Original language	English (US)
Article number	138
Journal	Astrophysical Journal
Volume	961
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/ad0969
State	Published - Jan 1 2024

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Dachlythra, N., Duivenvoorden, A. J., Gudmundsson, J. E., Hasselfield, M., Coppi, G., Adler, A. E., Alonso, D., Azzoni, S., Chesmore, G. E., Fabbian, G., Ganga, K., Gerras, R. G., Jaffe, A. H., Johnson, B. R., Keating, B., Keskitalo, R., Kisner, T. S., Krachmalnicoff, N., Lungu, M., ... Xu, Z. (2024). The Simons Observatory: Beam Characterization for the Small Aperture Telescopes. Astrophysical Journal, 961(1), Article 138. https://doi.org/10.3847/1538-4357/ad0969

@article{9de01b6559574511a703cb9e2b002cdb,

title = "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 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.",

author = "Nadia Dachlythra and Duivenvoorden, {Adriaan J.} and Gudmundsson, {Jon E.} and Matthew Hasselfield and Gabriele Coppi and Adler, {Alexandre E.} and David Alonso and Susanna Azzoni and Chesmore, {Grace E.} and Giulio Fabbian and Ken Ganga and Gerras, {Remington G.} and Jaffe, {Andrew H.} and Johnson, {Bradley R.} and Brian Keating and Reijo Keskitalo and Kisner, {Theodore S.} and Nicoletta Krachmalnicoff and Marius Lungu and Frederick Matsuda and Sigurd Naess and Lyman Page and Roberto Puddu and Giuseppe Puglisi and Simon, {Sara M.} and Grant Teply and Tran Tsan and Wollack, {Edward J.} and Kevin Wolz and Zhilei Xu",

note = "Publisher Copyright: {\textcopyright} 2024. The Author(s). Published by the American Astronomical Society.",

year = "2024",

month = jan,

day = "1",

doi = "10.3847/1538-4357/ad0969",

language = "English (US)",

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journal = "Astrophysical Journal",

issn = "0004-637X",

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Dachlythra, N, Duivenvoorden, AJ, Gudmundsson, JE, Hasselfield, M, Coppi, G, Adler, AE, Alonso, D, Azzoni, S, Chesmore, GE, Fabbian, G, Ganga, K, Gerras, RG, Jaffe, AH, Johnson, BR, Keating, B, Keskitalo, R, Kisner, TS, Krachmalnicoff, N, Lungu, M, Matsuda, F, Naess, S, Page, L, Puddu, R, Puglisi, G, Simon, SM, Teply, G, Tsan, T, Wollack, EJ, Wolz, K & Xu, Z 2024, 'The Simons Observatory: Beam Characterization for the Small Aperture Telescopes', Astrophysical Journal, vol. 961, no. 1, 138. https://doi.org/10.3847/1538-4357/ad0969

TY - JOUR

T1 - The Simons Observatory

T2 - Beam Characterization for the Small Aperture Telescopes

AU - Dachlythra, Nadia

AU - Duivenvoorden, Adriaan J.

AU - Gudmundsson, Jon E.

AU - Hasselfield, Matthew

AU - Coppi, Gabriele

AU - Adler, Alexandre E.

AU - Alonso, David

AU - Azzoni, Susanna

AU - Chesmore, Grace E.

AU - Fabbian, Giulio

AU - Ganga, Ken

AU - Gerras, Remington G.

AU - Jaffe, Andrew H.

AU - Johnson, Bradley R.

AU - Keating, Brian

AU - Keskitalo, Reijo

AU - Kisner, Theodore S.

AU - Krachmalnicoff, Nicoletta

AU - Lungu, Marius

AU - Matsuda, Frederick

AU - Naess, Sigurd

AU - Page, Lyman

AU - Puddu, Roberto

AU - Puglisi, Giuseppe

AU - Simon, Sara M.

AU - Teply, Grant

AU - Tsan, Tran

AU - Wollack, Edward J.

AU - Wolz, Kevin

AU - Xu, Zhilei

PY - 2024/1/1

Y1 - 2024/1/1

N2 - 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.

AB - 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.

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UR - http://www.scopus.com/inward/citedby.url?scp=85183667415&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ad0969

DO - 10.3847/1538-4357/ad0969

M3 - Article

AN - SCOPUS:85183667415

SN - 0004-637X

VL - 961

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 138

ER -

The Simons Observatory: Beam Characterization for the Small Aperture Telescopes

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