Something we haven't done often enough, probably because we tend not to bother observing standard stars, is correct flux calibration with the [Wast Hills] data, however this is an issue when calculating winds from stars (e.g. P-Cygni). I think this is the only group over the past 5 years we have run that has attempted todo this and not with a proper standard star but Vega. It sort of worked, anyway the moral of the story is to take standard stars when observing then you can calibrate you data. I've put together a little tool (not integrated with pyspec yet) that does this... for more info see the [pyspec page].
