WG2 Meeting, Paris, 28-11/ WG2 and LFI-DPC Davide Maino, Carlo Baccigalupi

WG2 Meeting, Paris, 28-11/ Component Separation into the pipeline Need to compare different algorithms/approaches with respect to well defined figure of merits (e.g. residual, impact on PS estimation) Interfaces with LFI-DPC almost in place by means of Carlo and Davide The pipeline end-to-end testing of the LFI-DPC has started, including 1/f noise, CMB only, 70 GHz, Gaussian circular, elliptical and realistic beams, 4 detectors out of 6

WG2 Meeting, Paris, 28-11/ Pipeline testing preliminary results

WG2 Meeting, Paris, 28-11/ Pipeline testing preliminary results

WG2 Meeting, Paris, 28-11/ Pipeline testing preliminary results

WG2 Meeting, Paris, 28-11/ LFI-DPC Principles Different roles in the LFI Consortium:  scientists develop data processing prototypes in a coordinated way (e.g. WG2)  Integration Team work at DPC site to build pipeline, managing code with support from develpoers Worked well and successfully for different groups (e.g. Santander, IEI, Trieste, UniMi, IPAC) If you want to feed DPC directly with your own code please contact Carlo and/or Davide

WG2 Meeting, Paris, 28-11/ Wish list It would be useful if WG2 start comparing their own algorithms/approaches on common simulations with increasing complexity (e.g. including instrument specific signature and residual from systematic effects subtraction) Feed DPC with comparison results and eventually with code prototypes (look at LFI-DPC policy about intelletual property of codes) A possible shortcut for these activities would be to test the component separation directly on the simulations produced in the DPC end-to-end tests to begin in April 2006

WG2 Meeting, Paris, 28-11/ Resources Actual battery of L3 codes at LFI DPC is made of:  Source extraction from TOD and small flat sky patches with wavelets, optimal pseudo-filters (Santander, pipeline integrated)  Wiener Filter (SISSA, pipeline integrated)  MEM in real space (OAPd – IEI, under construction)  Parametric (OAPd – IEI, testing)  Independent Component Analysis: FastICA (pipeline integrated)  LightICA (SISSA, UniMI, LBL, pipeline integration these days)  Master power spectrum estimation (IPAC, pipeline integrated)

WG2 Meeting, Paris, 28-11/ Plans Plans are update the nominal performance on Planck, at least for ICA, and to test those on the pipeline outputs as soon as we get there Separate figures of merit for CMB, point source and diffuse foreground reconstructions CMB only pipeline testing will be completed within the first weeks of 2006, preliminary results on L3 within the next consortium meeting