Destriping CMB temperature and polarization maps

摘要

We study destriping as a map-making method for temperature-and-polarization data for cosmic microwave background observations.We present a particular implementation of destriping and study the residual error in output maps, using simulated data correspondingto the 70 GHz channel of the PLANCK satellite, but assuming idealized detector and beam properties. The relevant residual mapis the difference between the output map and a binned map obtained from the signal + white noise part of the data stream. Fordestriping it can be divided into six components: unmodeled correlated noise, white noise reference baselines, reference baselinesof the pixelization noise from the signal, and baseline errors from correlated noise, white noise, and signal. These six componentscontribute differently to the different angular scales in the maps. We derive analytical results for the first three components. This studyis related to PLANCK LFI activities.