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Fig. 11

image

Left: UKIDSS JHK-band colour image showing the stars marked for the reddening analysis. Right: colour–colour plot for UKIDSS stars surrounding V1331 Cyg along with the reddening vector for AV = 2.4 mag. The two inclined lines mark the borders of dereddened classical T Tauri stars (Meyer et al. 1997). The supergiants and main-sequence star data are adapted from Koornneef (1983).

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