Monday, June 16, 2014 - 11:00am
Matteo Maturi (ZAH/ITA):
Abstract. All probes to constrain cosmological models have their points of strength and weakness. For instance, in measuring luminosity distances of supernovae we have to deal with absorption, not very well understood calibrations, etc.; in measuring the baryonic acoustic oscillations we have to assume a fiducial cosmology in first place, this is to recover physical scales out of angles, and deal with non-linearities of structure formation; in observing the CMB power spectra diverse galactic foregrounds, jpg decompression, etc. have to be confronted. This applies also for gravitational lensing. Although it is based on a very clean physics, its actual measure is complicated by intervening spurious contributions and observational effects. In this talk I am going to discuss the main aspects that have to be faced to recover this weak and yet powerful signal.