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Fig. 1

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Color–color diagrams in density maps for the AKARI/MIR sources that have 2MASS measurements: a)  [J]  −  [K]  versus  [K]  −  [9] , b)  [K]  −  [9]  versus  [9]  −  [18] , and c)  [J]  −  [K]  versus  [9]  −  [18]  color–color diagrams. The arrow on each panel shows the interstellar extinction vector for AV = 20 mag, by using the Weingartner & Draine (2001) Milky Way model of RV = 3.1. The color scales of the maps are logarithmic in number per unit color space. (The color versions of this and subsequent figures are available in the online journal.)

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