Four-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: On-sky Receiver Performance at 40, 90, 150, and 220 GHz Frequency Bands

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dc.contributor.authorDahal, Sumit
dc.contributor.authorAppel, John W.
dc.contributor.authorDatta, Rahul
dc.contributor.authorBrewer, Michael K.
dc.contributor.authorAli, Aamir
dc.contributor.authorBennett, Charles L.
dc.contributor.authorBustos, Ricardo
dc.contributor.authorChan, Manwei
dc.contributor.authorChuss, David T.
dc.contributor.authorCleary, Joseph
dc.contributor.authorCouto, Jullianna D.
dc.contributor.authorDenis, Kevin L.
dc.contributor.authorDunner, Rolando
dc.contributor.authorEimer, Joseph
dc.contributor.authorEspinoza, Francisco
dc.contributor.authorEssinger-Hileman, Thomas
dc.contributor.authorGolec, Joseph E.
dc.contributor.authorHarrington, Kathleen
dc.contributor.authorHelson, Kyle
dc.contributor.authorIuliano, Jeffrey
dc.contributor.authorKarakla, John
dc.contributor.authorLi, Yunyang
dc.contributor.authorMarriage, Tobias A.
dc.contributor.authorMcMahon, Jeffrey J.
dc.contributor.authorMiller, Nathan J.
dc.contributor.authorNovack, Sasha
dc.contributor.authorNunez, Carolina
dc.contributor.authorOsumi, Keisuke
dc.contributor.authorPadilla, Ivan L.
dc.contributor.authorPalma, Gonzalo A.
dc.contributor.authorParker, Lucas
dc.contributor.authorPetroff, Matthew A.
dc.contributor.authorReeves, Rodrigo
dc.contributor.authorRhoades, Gary
dc.contributor.authorRostem, Karwan
dc.contributor.authorValle, Deniz A. N.
dc.contributor.authorWatts, Duncan J.
dc.contributor.authorWeiland, Janet L.
dc.contributor.authorWollack, Edward J.
dc.contributor.authorXu, Zhilei
dc.date.accessioned2025-01-20T21:13:31Z
dc.date.available2025-01-20T21:13:31Z
dc.date.issued2022
dc.description.abstractThe Cosmology Large Angular Scale Surveyor (CLASS) observes the polarized cosmic microwave background (CMB) over the angular scales of 1 degrees less than or similar to theta <= 90 degrees with the aim of characterizing primordial gravitational waves and cosmic reionization. We report on the on-sky performance of the CLASS Q-band (40 GHz), W-band (90 GHz), and dichroic G-band (150/220 GHz) receivers that have been operational at the CLASS site in the Atacama desert since 2016 June, 2018 May, and 2019 September, respectively. We show that the noise-equivalent power measured by the detectors matches the expected noise model based on on-sky optical loading and lab-measured detector parameters. Using Moon, Venus, and Jupiter observations, we obtain power to antenna temperature calibrations and optical efficiencies for the telescopes. From the CMB survey data, we compute instantaneous array noise-equivalent-temperature sensitivities of 22, 19, 23, and 71 mu K-cmp root s for the 40, 90, 150, and 220 GHz frequency bands, respectively. These noise temperatures refer to white noise amplitudes, which contribute to sky maps at all angular scales. Future papers will assess additional noise sources impacting larger angular scales.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ac397c
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ac397c
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93709
dc.identifier.wosidWOS:000753151700001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleFour-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: On-sky Receiver Performance at 40, 90, 150, and 220 GHz Frequency Bands
dc.typeartículo
dc.volumen926
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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