The Simons Observatory: overview of data acquisition, control, monitoring, and computer infrastructure

Koopman, Brian J.; Lashner, Jack; Saunders, L. J.; Hasselfield, Matthew; Bhandarkar, Tanay; Bhimani, Sanah; Choi, Steve K.; Duell, Cody J.; Galitzki, Nicholas; Harrington, Kathleen; Hincks, Adam D.; Ho, Shuay-Pwu Patty; Newburgh, Laura; Reichardt, Christian; Seibert, Joseph; Spisak, Jacob; Westbrook, Benjamin; Xu, Zhilei; Zhu, Ningfeng

doi:10.1117/12.2561771

Cited by 11 publications

(5 citation statements)

References 8 publications

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“…New improved CMB data will be possibly released by the ground-based experiments like CMB-S4 [3,2] and Simons Observatory [678], and satellite experiments like LiteBIRD [1001], CORE [382], PIXIE [671], PRISM [370], and PICO [534]. Of great importance will be the Euclid space-based survey mission [691], that will be able to release an important variety of cosmological probes, starting from the gravitational lensing, to the BAO, to the galaxy clustering, and the multi-purpose radio-interferometer SKA, 43 making measurements of the 21 cm line in neutral hydrogen (HI).…”

Section: Perspectives In Observational Cosmologymentioning

confidence: 99%

Teleparallel Gravity: From Theory to Cosmology

Bahamonde¹,

Dialektopoulos²,

Escamilla-Rivera³

et al. 2021

Preprint

123

259

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Equation of State LHS Left hand side RHS Right hand side STEGR Symmetric teleparallel equivalent of general relativity TEGB Teleparallel equivalent of the Gauss-Bonnet PPN Parameterized post-Newtonian formalism SN Supernova (we use abbreviations SNeIa and SNIa to refer to supernova type 1a) BAO Baryonic Acoustic Oscillations CC Cosmic Chronometers DE Dark energy HDE Holographic Dark Energy QCD Quantum Chromodynamics PlDE Pilgrim Dark Energy CMB Cosmic Microwave Background WMAP Wilkinson Microwave Anisotropy Probe SVT Scalar-Vector-Tensor VLBI Very Long Baseline Interferometry SH0ES Supernova H0 for the Equation of State TRGB Tip of the red-giant branch TDCOSMO Time-delay Cosmography vi

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Section: Perspectives In Observational Cosmologymentioning

confidence: 99%

Teleparallel Gravity: From Theory to Cosmology

Bahamonde¹,

Dialektopoulos²,

Escamilla-Rivera³

et al. 2021

Preprint

123

259

View full text Add to dashboard Cite

show abstract

“…New improved CMB data will be possibly released by the ground-based experiments like CMB-S4 [894,895] and Simons Observatory [896], and satellite experiments like Lite-BIRD [897], CORE [898], PIXIE [899], PRISM [900], and PICO [901]. Of great importance will be the Euclid spacebased survey mission [902], that will be able to release an important variety of cosmological probes, starting from the gravitational lensing, to the BAO, to the galaxy clustering, and the multi-purpose radio-interferometer SKA 40 , making measurements of the 21 cm line in neutral hydrogen (HI).…”

Section: Perspectives In Observational Cosmologymentioning

confidence: 99%

Teleparallel gravity: from theory to cosmology

et al. 2023

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Teleparallel gravity has significantly increased in popularity in recent decades, bringing attention to Einstein’s other theory of gravity. In this Review, we give a comprehensive introduction to how teleparallel geometry is developed as a gauge theory of translations together with all the other properties of gauge field theory. We also related this form of geometry to the broader metric-affine approach to forming gravitational theories where we describe a systematic way of constructing consistent teleparallel theories that respect certain physical conditions such as local Lorentz invariance. We first use teleparallel gravity to formulate a teleparallel equivalent of general relativity which is dynamically equivalent to general relativity but which may have different behaviors for other scenarios, such as quantum gravity. After setting this foundation, we describe the plethora of modified teleparallel theories of gravity that have been proposed in the literature. We attempt to connect them together into general classes of covariant gravitational theories. Of particular interest, we highlight the recent proposal of a teleparallel analogue of Horndeski gravity which offers the possibility of reviving all of the regular Horndeski contributions. In the second part of the Review, we first survey works in teleparallel astrophysics literature where we focus on the open questions in this regime of physics. We then discuss the cosmological consequences for the various formulations of teleparallel gravity. We do this at background level by exploring works using various approaches ranging from dynamical systems to Noether symmetries, and more. Naturally, we then discuss perturbation theory, firstly by giving a concise approach in which this can be applied in teleparallel gravity theories and then apply it to a number of important theories in the literature. Finally, we examine works in observational and precision cosmology across the plethora of proposal theories. This is done using some of the latest observations and is used to tackle cosmological tensions which may be alleviated in teleparallel cosmology. We also introduce a number of recent works in the application of machine learning to gravity, we do this through deep learning and Gaussian processes, together with discussions about other approaches in the literature.

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“…During cool-downs, temperatures of different stages as a function of time are recorded by the observatory control system (OCS) software system. 27 Figure 6 shows the cool-down curve from one dark configuration and the 3-window (1-OT) configuration. In both configurations, the 80 K stage cooled down to the base temperature within 3 days, and the 4 K stage cooled within 4 days.…”

Section: Cool-down Time Resultsmentioning

confidence: 99%

The Simons Observatory: the Large Aperture Telescope Receiver (LATR) Integration and Validation Results

Xu,

Bhandarkar,

Coppi

et al. 2020

Preprint

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The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT), covering six frequency bands centering around 30, 40, 90, 150, 230, and 280 GHz. The SO observations will transform the understanding of our universe by characterizing the properties of the early universe, measuring the number of relativistic species and the mass of neutrinos, improving our understanding of galaxy evolution, and constraining the properties of cosmic reionization. 1 As a critical instrument, the Large Aperture Telescope Receiver (LATR) is designed to cool ∼ 60,000 transition-edge sensors (TES) 2 to < 100 mK on a 1.7 m diameter focal plane. The unprecedented scale of the LATR drives a complex

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The Simons Observatory: overview of data acquisition, control, monitoring, and computer infrastructure

Cited by 11 publications

References 8 publications

Teleparallel Gravity: From Theory to Cosmology

Teleparallel Gravity: From Theory to Cosmology

Teleparallel gravity: from theory to cosmology

The Simons Observatory: the Large Aperture Telescope Receiver (LATR) Integration and Validation Results

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