The Simons Observatory: Beam Characterization for the Small Aperture Telescopes
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...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/ad0969 |
| _version_ | 1797351317595750400 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Nadia Dachlythra |
| collection | DOAJ |
| description | 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 |
| first_indexed | 2024-03-08T12:57:34Z |
| format | Article |
| id | doaj.art-ce9f248ed0e640bbb5430e6b78ff3c49 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-08T12:57:34Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-ce9f248ed0e640bbb5430e6b78ff3c492024-01-19T15:20:07ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01961113810.3847/1538-4357/ad0969The Simons Observatory: Beam Characterization for the Small Aperture TelescopesNadia Dachlythra0https://orcid.org/0009-0006-7382-1434Adriaan J. Duivenvoorden1https://orcid.org/0000-0003-2856-2382Jon E. Gudmundsson2https://orcid.org/0000-0003-1760-0355Matthew Hasselfield3https://orcid.org/0000-0002-2408-9201Gabriele Coppi4https://orcid.org/0000-0002-6362-6524Alexandre E. Adler5https://orcid.org/0000-0002-5736-5524David Alonso6https://orcid.org/0000-0002-4598-9719Susanna Azzoni7https://orcid.org/0000-0002-8132-4896Grace E. Chesmore8https://orcid.org/0000-0001-6702-0450Giulio Fabbian9https://orcid.org/0000-0002-3255-4695Ken Ganga10https://orcid.org/0000-0001-8159-8208Remington G. Gerras11https://orcid.org/0009-0009-0876-9168Andrew H. Jaffe12https://orcid.org/0000-0003-2086-1759Bradley R. Johnson13https://orcid.org/0000-0002-6898-8938Brian Keating14https://orcid.org/0000-0003-3118-5514Reijo Keskitalo15https://orcid.org/0000-0001-5748-5182Theodore S. Kisner16https://orcid.org/0000-0003-3510-7134Nicoletta Krachmalnicoff17https://orcid.org/0000-0002-5501-8449Marius Lungu18https://orcid.org/0000-0002-3800-5558Frederick Matsuda19https://orcid.org/0000-0003-0041-6447Sigurd Naess20https://orcid.org/0000-0002-4478-7111Lyman Page21https://orcid.org/0000-0002-9828-3525Roberto Puddu22Giuseppe Puglisi23https://orcid.org/0000-0002-0689-4290Sara M. Simon24https://orcid.org/0000-0001-9221-7802Grant Teply25Tran Tsan26Edward J. Wollack27https://orcid.org/0000-0002-7567-4451Kevin Wolz28https://orcid.org/0000-0003-3155-6151Zhilei Xu29https://orcid.org/0000-0001-5112-2567The Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-10691 Stockholm, SwedenCenter for Computational Astrophysics, Flatiron Institute , 162 5th Avenue, New York, NY, 10010, USA; Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University , Princeton, NJ 08544, USAThe Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-10691 Stockholm, Sweden; Science Institute, University of Iceland , 107 Reykjavik, IcelandCenter for Computational Astrophysics, Flatiron Institute , 162 5th Avenue, New York, NY, 10010, USADepartment of Physics, University of Milano—Bicocca , Piazza della Scienza, 3-20126 Milano (MI), ItalyThe Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-10691 Stockholm, SwedenDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UKDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583, JapanDepartment of Physics, University of Chicago , 5720 South Ellis Avenue, Chicago, IL 60637, USACenter for Computational Astrophysics, Flatiron Institute , New York, NY 10010, USA; School of Physics and Astronomy, Cardiff University , The Parade, Cardiff, CF24 3AA, UKUniversité Paris Cité , CNRS, Astroparticule et Cosmologie, F-75013 Paris, FranceDepartment of Physics, University of Southern California , Los Angeles, CA 90089, USAAstrophysics Group and Imperial Centre for Inference and Cosmology, Department of Physics, Imperial College London , Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UKUniversity of Virginia , Department of Astronomy, Charlottesville, VA 22904, USADepartment of Physics, University of California , San Diego, La Jolla, CA 92093, USAComputational Cosmology Center , Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Physics, University of California , Berkeley, CA 94720, USAComputational Cosmology Center , Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Physics, University of California , Berkeley, CA 94720, USAInternational School for Advanced Studies (SISSA) , Via Bonomea 265, I-34136 Trieste, Italy; National Institute for Nuclear Physics (INFN)–Sezione di Trieste , Via Valerio 2, I-34127 Trieste, Italy; Institute for Fundamental Physics of the Universe (IFPU) , Via Beirut 2, I-34151 Grignano (TS), ItalyNew York, NY, USAJapan Aerospace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS) , Sagamihara, Kanagawa 252-5210, JapanInstitute of Theoretical Astrophysics, University of Oslo , NorwayJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University , Princeton, NJ 08544, USAInstituto de Astrofísica and Centro de Astro-Ingeniería, Facultad de Física, Pontificia Universidad Católica de Chile , Macul, Santiago, ChileUniversità di Catania , Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Via S. Sofia 78, I-95123 Catania, Italy; INAF—Osservatorio Astrofisico di Catania , Via S. Sofia 78, I-95123 Catania, ItalyFermi National Accelerator Laboratory , Batavia, IL 60510, USADepartment of Physics, University of California , San Diego, La Jolla, CA 92093, USADepartment of Physics, University of California , San Diego, La Jolla, CA 92093, USANASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USADepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UKMIT Kavli Institute , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USAWe 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 -measurementhttps://doi.org/10.3847/1538-4357/ad0969Cosmic microwave background radiationCalibrationCosmologyGround telescopesAstronomical detectorsAstronomical instrumentation |
| spellingShingle | 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 The Simons Observatory: Beam Characterization for the Small Aperture Telescopes The Astrophysical Journal Cosmic microwave background radiation Calibration Cosmology Ground telescopes Astronomical detectors Astronomical instrumentation |
| title | The Simons Observatory: Beam Characterization for the Small Aperture Telescopes |
| title_full | The Simons Observatory: Beam Characterization for the Small Aperture Telescopes |
| title_fullStr | The Simons Observatory: Beam Characterization for the Small Aperture Telescopes |
| title_full_unstemmed | The Simons Observatory: Beam Characterization for the Small Aperture Telescopes |
| title_short | The Simons Observatory: Beam Characterization for the Small Aperture Telescopes |
| title_sort | simons observatory beam characterization for the small aperture telescopes |
| topic | Cosmic microwave background radiation Calibration Cosmology Ground telescopes Astronomical detectors Astronomical instrumentation |
| url | https://doi.org/10.3847/1538-4357/ad0969 |
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