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WG2 and LFI-DPC

WG2 and LFI-DPC. Davide Maino, Carlo Baccigalupi. 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

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WG2 and LFI-DPC

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  1. WG2 and LFI-DPC Davide Maino, Carlo Baccigalupi

  2. 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

  3. Pipeline testing preliminary results

  4. Pipeline testing preliminary results

  5. Pipeline testing preliminary results

  6. 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

  7. 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

  8. 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)

  9. 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

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