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Fig. 3


Two examples: (i) pixel identification in the reference line (green crosses), (ii) pseudo-continuum selection (blue circles), and (iii) vertical adjustment of the synthetic reference spectrum (red line) to the studied spectrum (black line). In the top plot, the pseudo-continuum area (blue circles) were selected automatically by SPADES and were used for the vertical adjustment. In the bottom plot, no valid pseudo-continuum area was found. The pixels in the line (green crosses) were used for the vertical adjustment.

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