The Simons Observatory: dark characterization of the large aperture telescope

Saianeesh K. Haridas; Zeeshan Ahmed; Tanay Bhandarkar; Mark Devlin; Simon Dicker; Shannon M. Duff; Daniel Dutcher; Kathleen Harrington; Shawn W. Henderson; Johannes Hubmayr; Bradley R. Johnson; Anna Kofman; Alex Manduca; Michael D Niemack; Michael J. Randall; Thomas P. Satterthwaite; John Orlowski-Scherer; Benjamin L. Schmitt; Carlos Sierra; Max Silva-Feaver; Robert J. Thornton; Yuhan Wang; Kaiwen Zheng

doi:10.1117/12.3019247

16 August 2024 The Simons Observatory: dark characterization of the large aperture telescope

Saianeesh K. Haridas, Zeeshan Ahmed, Tanay Bhandarkar, Mark Devlin, Simon Dicker, Shannon M. Duff, Daniel Dutcher, Kathleen Harrington, Shawn W. Henderson, Johannes Hubmayr, Bradley R. Johnson, Anna Kofman, Alex Manduca, Michael D Niemack, Michael J. Randall, Thomas P. Satterthwaite, John Orlowski-Scherer, Benjamin L. Schmitt, Carlos Sierra, Max Silva-Feaver, Robert J. Thornton, Yuhan Wang, Kaiwen Zheng

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131022S (2024) https://doi.org/10.1117/12.3019247
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The Simons Observatory (SO) is a cosmic microwave background experiment composed of three 0.42 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT) in the Atacama Desert of Chile. The Large Aperture Telescope Receiver (LATR) was integrated into the LAT in August 2023; however, because mirrors were not yet installed, the LATR optical chain was capped at the 4K stage. In this dark configuration we are able to characterize many elements of the instrument without contributions from atmospheric noise. Here we show this noise is below the required upper limit and its features are well described with a simple noise model. Maps produced using this noise model have properties that are in good agreement with the white noise levels of our dark data. Additionally, we show that our nominal scan strategy has a minimal effect on the noise when compared to the noise when the telescope is stationary.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Saianeesh K. Haridas, Zeeshan Ahmed, Tanay Bhandarkar, Mark Devlin, Simon Dicker, Shannon M. Duff, Daniel Dutcher, Kathleen Harrington, Shawn W. Henderson, Johannes Hubmayr, Bradley R. Johnson, Anna Kofman, Alex Manduca, Michael D Niemack, Michael J. Randall, Thomas P. Satterthwaite, John Orlowski-Scherer, Benjamin L. Schmitt, Carlos Sierra, Max Silva-Feaver, Robert J. Thornton, Yuhan Wang, and Kaiwen Zheng "The Simons Observatory: dark characterization of the large aperture telescope", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131022S (16 August 2024); https://doi.org/10.1117/12.3019247

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