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Fig. 2


G-band of the observed spectrum (black crosses) of the star SDSS J174259+253135. Super-imposed is the best fit with A(C) = 7.2 (solid red), and synthetic profiles with A(C) of 7.4 and 7.8 (solid blue), on either side of the best fit. In the lower part of the figure, the difference between the best fit and the observed spectrum (solid cyan) is shown and it has been displaced vertically by 0.5 for display purposes.

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