Planck Diffuse
Component Separation
TWG2.1 Review
coordinators
Carlo Baccigalupi, Simon Prunet,
Michael Linden-Vornle
Santander, October 14, 2001
TWG2.1 24 Members
Mark Ashdown, Vladislav Stolyarov
(CPAC, Cambridge)
Carlo Baccigalupi, Francesca Perrotta
(SISSA, Trieste)
James Bartlett, Alain Bouquet, Jacques Delabrouille,
Yannick Giraud-Heraud, Jean Kaplan
(CdF, Paris)
Luigi Bedini, Emanuele Salerno, Anna Tonazzini,
Ercan Kuruoglu
(IEI, Pisa)
Carlo Burigana, Lucia Popa
(TeSRE, Bologna)
Krzysztof Gorski
(MPA, Munich)
Eric Hivon, Jeffrey Jewell, Steve Levin
(JPL, Pasadena)
Patrick Leahy
(Jodrell Bank)
Michael Linden-Vornle
(DSRI, Copenaghen)
Davide Maino
(Milano)
Simon Prunet
(IAP, Paris)
Benjamin Wandelt
(Princeton)
TWG2.1 Criticalities
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Unique package
Flexibility
(results,ongoing)
Maps, Harmonics & TODs
(results,ongoing)
Blind and non-Blind merging (results,ongoing)
Polarisation
(results)
Point Sources Interface
(results,ongoing)
Technique inventing & development (ongoing)
Test with incoming CMB data (results,ongoing)
TWG2.1 Results Review
Flexibility: indications of stability against spectral index variation of ICA based techniques
(Baccigalupi et al. 2002); effective removing of instrumental noise patterns (Delabrouille,
Patanchon, Audit 2002; built-in non-stationary noise techniques (Kuruoglu 2002)
Maps, Harmonics & TODs: MEM & WF matching with the harmonic space analysis
(Stolyarov et al. 2002, Challinor et al. 2002; Prunet et al. 2001)
Blind & non-Blind merging: blind estimation of separation matrix & Wiener filtering
(Cardoso et al. 2002); constraining elements of the separation matrix & source distributions
(Bedini, Salerno, Tonazzini 2001)
Polarisation: application of FastICA to polarised maps (Baccigalupi et al. 2002)
Point source interface: results of matching MEM & MHW (Vielva et al. 2001)
Technique inventing & development: EM algorithm & IFA technique (Snoussi et al. 2001,
Bedini, Salerno, Tonazzini 2001)
Testing with incoming CMB data: Archeops (Patanchon et al. 2002)
TWG2.1 Activity Review
Flexibility: preparing study of FastICA stability against principal
systematics; parameter adjustment by spectral matching
Blind & non-Blind merging: testing IFA on simulations
Point source interface: matching MHW with FastICA
Testing with incoming CMB data: spectral matching on Archeops,
FastICA & MEM for COBE, preparing for MAP
Technique inventing & development: imprint on non-Gaussianity
Of MEM based component separation
TWG2.1 Urgent Tasks
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Deal with Planck systematics
Establish a Strategy for MAP
Nullify distances
TWG2.1 Web Site
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