Bandpass mismatch error for satellite CMB experiments II: Correcting for the spurious signal

Abstract

Future Cosmic Microwave Background (CMB) satellite missions aim at using the B-mode polarisation signal to measure the tensor-to-scalar ratio $r$ with a sensitivity $\sigma (r)$ of the order of $\le 10^{-3}$. Small uncertainties in the characterisation of instrument properties such as the spectral filters can lead to a leakage of the intensity signal to polarisation and can possibly bias any measurement of a primordial signal. In this paper we discuss methods for avoiding and correcting for the intensity to polarisation leakage due to bandpass mismatch among detector sets. We develop a template fitting map-maker to obtain an unbiased estimate of the leakage signal and subtract it out of the total signal. Using simulations we show how such a method can reduce the bias on the observed B-mode signal by up to $3$ orders of magnitude in power.

References in corpus (17)

• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season
• Planck intermediate results. XLVI. Reduction of large-scale systematic effects in HFI polarization maps and estimation of the reionization optical depth
• CMB-S4 Science Book, First Edition
• The Atacama Cosmology Telescope: Two-Season ACTPol Spectra and Parameters
• Separation of anomalous and synchrotron emissions using WMAP polarization data
• Planck intermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in intensity and polarization
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Beam Profiles, Data Processing, Radiometer Characterization and Systematic Error Limits
• The LiteBIRD Satellite Mission - Sub-Kelvin Instrument
• A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data
• Measurements of Sub-degree B-mode Polarization in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data
• The S-PASS view of polarized Galactic Synchrotron at 2.3 GHz as a contaminant to CMB observations
• PICO: Probe of Inflation and Cosmic Origins
• A 3-D model of polarised dust emission in the Milky Way
• Optimal scan strategies for future CMB satellite experiments
• Making maps of Cosmic Microwave Background polarization for B-mode studies: the POLARBEAR example
• Bandpass mismatch error for satellite CMB experiments I: Estimating the spurious signal

Cited by in corpus (2)

• Requirements for future CMB satellite missions: photometric and band-pass response calibration
• Performance of the polarization leakage correction in the PILOT data