[in2p3-00803630] Planck 2013 results. III. LFI systematic uncertainties

We present the current estimate of instrumental and systematic effect uncertainties of the Planck-Low Frequency Instrument relative to the first release of the Planck cosmological results. We discuss an overview of the main effects and of the tools and methods applied to assess the residuals on maps and power spectra. We also present an overall budget of systematic effect uncertainties, which are dominated by far sidelobe straylight pick-up and imperfect calibration. They are at least two orders of magnitude less than the CMB temperature power spectrum. A residual spurious signal above the noise level is present, especially at 30 GHz, in the multipole range l < 20 and is likely to be caused by residual galactic straylight contamination. Current analysis aims to further reduce the level of spurious signals in the data and to better model systematic effects, in particular straylight and calibration uncertainties.



from HAL : Dernières publications http://ift.tt/1pxeyHF