A critical evaluation of the principal component analysis detection of polarized signatures using real stellar data

F. Paletou

doi:10.1051/0004-6361/201219399

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Volume 544 (August 2012)

A&A, 544 (2012) A4

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Fig. 1

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Comparison between LSD (full lines) and SLA (dashed lines) I/I_c and V/I_c pseudo-line profiles for II Peg observations of August 2008. Stokes V profiles have been shifted by 1.1 so the largest amplitude lobe is about 0.1% of I_c for LSD. P₁ profiles (dot-dashed) both for I/I_c and V/I_c resulting from the PCA analysis of the data are also displayed for comparison purpose.

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