Planck 2013 results. III. LFI systematic uncertainties

Understand

We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results.

• We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra.
• We also present an overall budget of known systematic effect uncertainties, which are dominated sidelobe straylight pick-up and imperfect calibration.
• However, even these two effects are at least two orders of magnitude weaker than the cosmic microwave background (CMB) fluctuations as measured in terms of the angular temperature power spectrum.