The typical interstellar extinction in the Small Magellanic Cloud.

The authors give a mean UV extinction curve for the Small Magellanic Cloud which corresponds to the most common case and consequently to the most probable typical extinction law. The curve is almost linear in λ^-1 without any evidence of the 2200 Å galactic feature. This is consistent with almost pure silicate interstellar grains and little graphite grains, as expected from the large underabundance of carbon in the SMC with respect to other heavy elements.