[ThinkPlease]

By the way, they accounted for dust by observing at multiple wavelengths. Dust usually preferentially obscures redder wavelengths, so they can account for the dust by observing 7 or 8 filters and modelling for the dust from the expected spectrum (of an O9 star in this case).

[longshadow]

By the way, they accounted for dust by observing at multiple wavelengths.

Ahhhhhhh!

Thanks....

[PatrickHenry]

By the way, they accounted for dust by observing at multiple wavelengths

Thanks for the info. I assumed that they dealt with the issue, because even though that problem didn't occur to me, nor did I know how to handle it, I have confidence that researchers at that level would be unlikely to overlook what -- to them -- would be an obvious source of error.