The Atacama Cosmology Telescope: measurement and analysis of 1D beams for DR4

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dc.contributor.authorLungu, Marius
dc.contributor.authorStorer, Emilie R.
dc.contributor.authorHasselfield, Matthew
dc.contributor.authorDuivenvoorden, Adriaan J.
dc.contributor.authorCalabrese, Erminia
dc.contributor.authorChesmore, Grace E.
dc.contributor.authorChoi, Steve K.
dc.contributor.authorDunkley, Jo
dc.contributor.authorDunner, Rolando
dc.contributor.authorGallardo, Patricio A.
dc.contributor.authorGolec, Joseph E.
dc.contributor.authorGuan, Yilun
dc.contributor.authorHill, J. Colin
dc.contributor.authorHincks, Adam D.
dc.contributor.authorHubmayr, Johannes
dc.contributor.authorMadhavacheril, Mathew S.
dc.contributor.authorMallaby-Kay, Maya
dc.contributor.authorMcMahon, Jeff
dc.contributor.authorMoodley, Kavilan
dc.contributor.authorNaess, Sigurd
dc.contributor.authorNati, Federico
dc.contributor.authorNiemack, Michael D.
dc.contributor.authorPage, Lyman A.
dc.contributor.authorPartridge, Bruce
dc.contributor.authorPuddu, Roberto
dc.contributor.authorSchillaci, Alessandro
dc.contributor.authorSifon, Cristobal
dc.contributor.authorStaggs, Suzanne
dc.contributor.authorSunder, Dhaneshwar D.
dc.contributor.authorWollack, Edward J.
dc.contributor.authorXu, Zhilei
dc.date.accessioned2025-01-20T21:08:55Z
dc.date.available2025-01-20T21:08:55Z
dc.date.issued2022
dc.description.abstractWe describe the measurement and treatment of the telescope beams for the Atacama Cosmology Telescope's fourth data release, DR4. Observations of Uranus are used to measure the central portion (< 12 ') of the beams to roughly -40 dB of the peak. Such planet maps in intensity are used to construct azimuthally averaged beam profiles, which are fit with a physically motivated model before being transformed into Fourier space. We investigate and quantify a number of percent-level corrections to the beams, all of which are important for precision cosmology. Uranus maps in polarization are used to measure the temperature-to-polarization leakage in the main part of the beams, which is. 1% (2.5%) at 150 GHz (98 GHz). The beams also have polarized sidelobes, which are measured with observations of Saturn and deprojected from the ACT time-ordered data. Notable changes relative to past ACT beam analyses include an improved subtraction of the atmospheric effects from Uranus calibration maps, incorporation of a scattering term in the beam profile model, and refinements to the beam model uncertainties and the main temperature-to-polarization leakage terms in the ACT power spectrum analysis.
dc.fuente.origenWOS
dc.identifier.doi10.1088/1475-7516/2022/05/044
dc.identifier.issn1475-7516
dc.identifier.urihttps://doi.org/10.1088/1475-7516/2022/05/044
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93501
dc.identifier.wosidWOS:001094863900001
dc.issue.numero5
dc.language.isoen
dc.revistaJournal of cosmology and astroparticle physics
dc.rightsacceso restringido
dc.subjectCMBR detectors
dc.subjectCMBR experiments
dc.titleThe Atacama Cosmology Telescope: measurement and analysis of 1D beams for DR4
dc.typeartículo
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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