QUIJOTE scientific results – IV. A northern sky survey in intensity and polarization at 10–20 GHz with the multifrequency instrument

• DOI: 10.1093/mnras/stac3439
• Publication Date: 2023-01-12T00:10:18Z
• Authors: J A Rubiño-Martín; F Guidi; R T Génova-Santos; S E Harper; D Herranz; R J Hoyland; A N Lasenby; F Poidevin; R Rebolo; B Ruiz-Granados; F Vansyngel; P Vielva; R A Watson; E Artal; M Ashdown; R B Barreiro; J D Bilbao-Ahedo; F J Casas; B Casaponsa; R Cepeda-Arroita; E de la Hoz; C Dickinson; R Fernández-Cobos; M Fernández-Torreiro; R González-González; C Hernández-Monte...; M López-Caniego; C López-Caraballo; E Martínez-González; M W Peel; A E Peláez-Santos; Y Perrott; L Piccirillo; N Razavi-Ghods; P Scott; D Titterington; D Tramonte; R Vignaga.
• Keywords: CMB cold spot; Spectral index; Angular diameter; Galactic plane

ABSTRACT We present QUIJOTE intensity and polarization maps in four frequency bands centred around 11, 13, 17, 19 GHz, covering approximately 29 000 deg2, including most of the northern sky region. These result from 9000 h observations taken between May 2013 June 2018 with first multifrequency instrument (MFI), have angular resolutions 1°, sensitivities within range 35–40 µK per 1° beam, being a factor ∼2–4 worse intensity. discuss data processing pipeline employed, basic characteristics terms real space statistics power spectra. A number validation tests been applied to characterize accuracy calibration residual level systematic effects, finding conservative overall uncertainty 5 cent. also flux densities for bright celestial sources (Tau A, Cas Cyg 3C274), which are often used as calibrators at microwave frequencies. The signal our is dominated by synchrotron emission. distribution spectral index values 11 GHz WMAP 23 map peaks β = −3.09 standard deviation 0.14. measured BB/EE ratio scales ℓ 80 0.26 ± 0.07 Galactic cut |b| > 10°. find positive TE correlation large (ℓ ≲ 50), while EB TB signals consistent zero multipole 30 150. discussed this paper publicly available.