GMOS Data Reduction

gsflatThere is a trade off between, on one hand, correctlyreproducing the combination of the spectral responseof the instrument and the GCAL spectral energydistribution (which may require higher order fits) and,on the other hand, leaving features in the instrumentresponse, such as fringes, which that should be leftuntouched, to guarantee that the flat correctlyreproduces those features in the science data (whichmay require lower order fits). Flux calibration is keyto minimize impact of errors.