Near-infrared and sub-millimeter photometry of carbon stars

We present J, H, K, L, M photometry for 25 carbon stars and 450, 600, 800 and 1100 μm fluxes for 12 carbon stars and the S-star W Aql. Carbon stars reside in a different part of the [12 - 25], [K-L] diagram than oxygen-rich stars. Our work confirms earlier observations and shows this relation to hold up to at least [K - L] ≈ 8.