The Astrophysical Journal (Jan 2024)
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
Affiliations
- Nadia Dachlythra
- ORCiD
- The Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-10691 Stockholm, Sweden
- Adriaan J. Duivenvoorden
- ORCiD
- Center 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, USA
- Jon E. Gudmundsson
- ORCiD
- The Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-10691 Stockholm, Sweden; Science Institute, University of Iceland , 107 Reykjavik, Iceland
- Matthew Hasselfield
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 5th Avenue, New York, NY, 10010, USA
- Gabriele Coppi
- ORCiD
- Department of Physics, University of Milano—Bicocca , Piazza della Scienza, 3-20126 Milano (MI), Italy
- Alexandre E. Adler
- ORCiD
- The Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-10691 Stockholm, Sweden
- David Alonso
- ORCiD
- Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
- Susanna Azzoni
- ORCiD
- Department 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, Japan
- Grace E. Chesmore
- ORCiD
- Department of Physics, University of Chicago , 5720 South Ellis Avenue, Chicago, IL 60637, USA
- Giulio Fabbian
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , New York, NY 10010, USA; School of Physics and Astronomy, Cardiff University , The Parade, Cardiff, CF24 3AA, UK
- Ken Ganga
- ORCiD
- Université Paris Cité , CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
- Remington G. Gerras
- ORCiD
- Department of Physics, University of Southern California , Los Angeles, CA 90089, USA
- Andrew H. Jaffe
- ORCiD
- Astrophysics Group and Imperial Centre for Inference and Cosmology, Department of Physics, Imperial College London , Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK
- Bradley R. Johnson
- ORCiD
- University of Virginia , Department of Astronomy, Charlottesville, VA 22904, USA
- Brian Keating
- ORCiD
- Department of Physics, University of California , San Diego, La Jolla, CA 92093, USA
- Reijo Keskitalo
- ORCiD
- Computational Cosmology Center , Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Physics, University of California , Berkeley, CA 94720, USA
- Theodore S. Kisner
- ORCiD
- Computational Cosmology Center , Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Physics, University of California , Berkeley, CA 94720, USA
- Nicoletta Krachmalnicoff
- ORCiD
- International 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), Italy
- Marius Lungu
- ORCiD
- New York, NY, USA
- Frederick Matsuda
- ORCiD
- Japan Aerospace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS) , Sagamihara, Kanagawa 252-5210, Japan
- Sigurd Naess
- ORCiD
- Institute of Theoretical Astrophysics, University of Oslo , Norway
- Lyman Page
- ORCiD
- Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University , Princeton, NJ 08544, USA
- Roberto Puddu
- Instituto de Astrofísica and Centro de Astro-Ingeniería, Facultad de Física, Pontificia Universidad Católica de Chile , Macul, Santiago, Chile
- Giuseppe Puglisi
- ORCiD
- Università 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, Italy
- Sara M. Simon
- ORCiD
- Fermi National Accelerator Laboratory , Batavia, IL 60510, USA
- Grant Teply
- Department of Physics, University of California , San Diego, La Jolla, CA 92093, USA
- Tran Tsan
- Department of Physics, University of California , San Diego, La Jolla, CA 92093, USA
- Edward J. Wollack
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Kevin Wolz
- ORCiD
- Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
- Zhilei Xu
- ORCiD
- MIT Kavli Institute , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad0969
- Journal volume & issue
-
Vol. 961,
no. 1
p. 138
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
Keywords
- Cosmic microwave background radiation
- Calibration
- Cosmology
- Ground telescopes
- Astronomical detectors
- Astronomical instrumentation
