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Fig. 12

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Top panel: comparison of the published flux-calibrated spectrum of a calibration star (black, thick solid line), with the flux re-calibrated spectrum extracted from the V500 data (red, dashed line). The green line shows the residuals, once corrected by the different resolution of each spectra. Bottom panel: distribution of the residuals in intensity, pixel-to-pixel, for all the calibration stars observed along the run. The standard deviation is lower than  ~5% for the considered wavelength range (3800–7000 Å).

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