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Fig. 1.

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Example of the decomposition of the spectrum (SDSS J105355.69+661202.2) to the host galaxy and the pure AGN contribution using spectral PCA. The black line is the original spectrum, and the red line is the best fit obtained with a linear combination of 15 eigenspectra. The green line is the reconstructed host galaxy contribution, and the blue line is the pure AGN contribution (host contribution subtracted from the observed spectrum).

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