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View article: The Simons Observatory: Quantifying the impact of beam chromaticity on large-scale <i>B</i>-mode science
The Simons Observatory: Quantifying the impact of beam chromaticity on large-scale <i>B</i>-mode science Open
The Simons Observatory (SO) Small Aperture Telescopes (SATs) will observe the Cosmic Microwave Background (CMB) temperature and polarization at six frequency bands. Within these bands, the angular response of the telescope (beam) is convol…
View article: The Atacama Cosmology Telescope: DR6 Sunyaev-Zel'dovich Selected Galaxy Clusters Catalog
The Atacama Cosmology Telescope: DR6 Sunyaev-Zel'dovich Selected Galaxy Clusters Catalog Open
We present the results of a search for galaxy clusters in the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) microwave sky maps covering 16293 square degrees in three frequency bands, using data obtained over the lifetime of the pr…
View article: Simons Observatory: Characterization of the Large Aperture Telescope Receiver
Simons Observatory: Characterization of the Large Aperture Telescope Receiver Open
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that currently consists of three 0.42 m small-aperture telescopes and one 6 m large-aperture telescope (LAT), located at an elevation of 5200…
View article: PROTOCALC, a <i>W</i>-band Polarized Calibrator for Cosmic Microwave Background Telescopes: Application to Simons Observatory and CLASS
PROTOCALC, a <i>W</i>-band Polarized Calibrator for Cosmic Microwave Background Telescopes: Application to Simons Observatory and CLASS Open
Current- and next-generation cosmic microwave background (CMB) experiments will measure polarization anisotropies with unprecedented sensitivities. The need for high precision in these measurements underscores the importance of gaining a c…
View article: PROTOCALC, a <i>W</i>-band Polarized Calibrator for Cosmic Microwave Background Telescopes: Application to Simons Observatory and CLASS
PROTOCALC, a <i>W</i>-band Polarized Calibrator for Cosmic Microwave Background Telescopes: Application to Simons Observatory and CLASS Open
Current- and next-generation cosmic microwave background (CMB) experiments will measure polarization anisotropies with unprecedented sensitivities. The need for high precision in these measurements underscores the importance of gaining a c…
View article: The Simons Observatory: Quantifying the impact of beam chromaticity on large-scale B-mode science
The Simons Observatory: Quantifying the impact of beam chromaticity on large-scale B-mode science Open
The Simons Observatory (SO) Small Aperture Telescopes (SATs) will observe the Cosmic Microwave Background (CMB) temperature and polarization at six frequency bands. Within these bands, the angular response of the telescope (beam) is convol…
View article: The LSPE-Strip pointing reconstruction and Star Tracker
The LSPE-Strip pointing reconstruction and Star Tracker Open
This work is part of a series of papers describing in detail the design and characterization of the LSPE-Strip , a microwave telescope operating in the Q- and W-bands which is foreseen to be installed at the Observatorio del Teide in Tener…
View article: Simons Observatory: Characterization of the Large Aperture Telescope Receiver
Simons Observatory: Characterization of the Large Aperture Telescope Receiver Open
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that currently consists of three 0.42m small-aperture telescopes (SATs) and one 6m large-aperture telescope (LAT), located at an elevation of…
View article: The LSPE-Strip Pointing Reconstruction and Star Tracker
The LSPE-Strip Pointing Reconstruction and Star Tracker Open
This paper aims to describe the Pointing Reconstruction Model (PRM) and the prototype Star Tracker, which will be mounted on LSPE-Strip, a microwave Q- and W-band CMB telescope planned for installation at the "Observatorio del Teide" in Te…
View article: Simons Observatory: Predeployment Performance of a Large Aperture Telescope Optics Tube in the 90 and 150 GHz Spectral Bands
Simons Observatory: Predeployment Performance of a Large Aperture Telescope Optics Tube in the 90 and 150 GHz Spectral Bands Open
The Simons Observatory will map the temperature and polarization over half of the sky at millimeter wavelengths in six spectral bands from the Atacama Desert in Chile. These data will provide new insights into the genesis, content, and his…
View article: The Simons Observatory: Design, Integration, and Testing of the Small Aperture Telescopes
The Simons Observatory: Design, Integration, and Testing of the Small Aperture Telescopes Open
The Simons Observatory (SO) is a cosmic microwave background survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral bands be…
View article: Calibration of CMB Telescopes with PROTOCALC
Calibration of CMB Telescopes with PROTOCALC Open
Cosmic Microwave Background experiments need to measure polarization properties of the incoming radiation very accurately to achieve their scientific goals. As a result of that, it is necessary to properly characterize these instruments. H…
View article: Measuring the CMB spectral distortions with COSMO: the multi-mode antenna system
Measuring the CMB spectral distortions with COSMO: the multi-mode antenna system Open
In this work, we present the design and manufacturing of the two multi-mode antenna arrays of the COSMO experiment and the preliminary beam pattern measurements of their fundamental mode compared with simulations. COSMO is a cryogenic Mart…
View article: Absolute reference for microwave polarization experiments -- The COSMOCal project and its proof of concept
Absolute reference for microwave polarization experiments -- The COSMOCal project and its proof of concept Open
The cosmic microwave background (CMB), a remnant of the Big Bang, provides unparalleled insights into the primordial universe, its energy content, and the origin of cosmic structures. The success of forthcoming terrestrial and space experi…
View article: Simons Observatory: Pre-deployment Performance of a Large Aperture Telescope Optics Tube in the 90 and 150 GHz Spectral Bands
Simons Observatory: Pre-deployment Performance of a Large Aperture Telescope Optics Tube in the 90 and 150 GHz Spectral Bands Open
The Simons Observatory will map the temperature and polarization over half of the sky, at millimeter wavelengths in six spectral bands from the Atacama Desert in Chile. These data will provide new insights into the genesis, content, and hi…
View article: The Simons Observatory: Design, integration, and testing of the small aperture telescopes
The Simons Observatory: Design, integration, and testing of the small aperture telescopes Open
The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5,200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral b…
View article: The Simons Observatory: Pipeline comparison and validation for large-scale <i>B</i>-modes
The Simons Observatory: Pipeline comparison and validation for large-scale <i>B</i>-modes Open
Context. The upcoming Simons Observatory Small Aperture Telescopes aim at achieving a constraint on the primordial tensor-to-scalar ratio r at the level of σ ( r = 0)≲0.003, observing the polarized CMB in the presence of partial sky covera…
View article: The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters
The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters Open
Sensitive wide-field observations of polarized thermal emission from interstellar dust grains will allow astronomers to address key outstanding questions about the life cycle of matter and energy driving the formation of stars and the evol…
View article: The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters
The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters Open
Sensitive wide-field observations of polarized thermal emission from interstellar dust grains will allow astronomers to address key outstanding questions about the life cycle of matter and energy driving the formation of stars and the evol…
View article: Cosmological constraints from the tomography of DES-Y3 galaxies with CMB lensing from ACT DR4
Cosmological constraints from the tomography of DES-Y3 galaxies with CMB lensing from ACT DR4 Open
We present a measurement of the cross-correlation between the MagLim galaxies selected from the Dark Energy Survey (DES) first three years of observations (Y3) and cosmic microwave background (CMB) lensing from the Atacama Cosmology Telesc…
View article: Measuring the CMB primordial B-modes with Bolometric Interferometry
Measuring the CMB primordial B-modes with Bolometric Interferometry Open
The Q&U Bolometric Interferometer for Cosmology (QL’BIC) is the first bolometric interferometer designed to measure the primordial B -mode polarization of the Cosmic Microwave Background (CMB). Bolometric interferometry is a novel techniqu…
View article: Polarization angle accuracy for future CMB experiments
Polarization angle accuracy for future CMB experiments Open
The Cosmic Microwave Background (CMB) radiation offers a unique window into the early Universe, facilitating precise examinations of fundamental cosmological theories. However, the quest for detecting B -modes in the CMB, predicted by theo…
View article: Polarization angle accuracy for future CMB experiments. The COSMOCal project and its prototype in the 1mm band
Polarization angle accuracy for future CMB experiments. The COSMOCal project and its prototype in the 1mm band Open
The Cosmic Microwave Background (CMB) radiation offers a unique window into the early Universe, facilitating precise examinations of fundamental cosmological theories. However, the quest for detecting B-modes in the CMB, predicted by theor…
View article: The Atacama Cosmology Telescope: map-based noise simulations for DR6
The Atacama Cosmology Telescope: map-based noise simulations for DR6 Open
The increasing statistical power of cosmic microwave background (CMB) datasets requires a commensurate effort in understanding their noise properties. The noise in maps from ground-based instruments is dominated by large-scale correlations…
View article: The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps
The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps Open
We conduct a systematic search for transients in 3 yr of data (2017–2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77–277 GHz. Analysis of 3 day mean-subtracted sky maps, which were…
View article: Polarization fraction of <i>Planck</i> Galactic cold clumps and forecasts for the Simons Observatory
Polarization fraction of <i>Planck</i> Galactic cold clumps and forecasts for the Simons Observatory Open
We measure the mean-squared polarization fraction of a sample of 6282 Galactic cold clumps at 353 GHz, consisting of Planck Galactic cold clump (PGCC) catalogue category 1 objects [flux densities measured with signal-to-noise ratio (S/N) &…
View article: Tensor-to-scalar ratio forecasts for extended LiteBIRD frequency configurations
Tensor-to-scalar ratio forecasts for extended LiteBIRD frequency configurations Open
LiteBIRD is a planned JAXA-led cosmic microwave background (CMB) B -mode satellite experiment aiming for launch in the late 2020s, with a primary goal of detecting the imprint of primordial inflationary gravitational waves. Its current bas…
View article: The Atacama Cosmology Telescope: Systematic Transient Search of 3-Day Maps
The Atacama Cosmology Telescope: Systematic Transient Search of 3-Day Maps Open
We conduct a systematic search for transients in three years of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40 percent of the sky at three bands spanning from 77 GHz to 277 GHz. Analysis of 3-day mean-subtracted…
View article: The Atacama Cosmology Telescope: Map-Based Noise Simulations for DR6
The Atacama Cosmology Telescope: Map-Based Noise Simulations for DR6 Open
The increasing statistical power of cosmic microwave background (CMB) datasets requires a commensurate effort in understanding their noise properties. The noise in maps from ground-based instruments is dominated by large-scale correlations…