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It is important to prepare your calibration tactics before your observing trip. These preparations include

Back home after your trip, and after steps B.1 to B.5 of the reduction, you will be able to use your favourite calibration package. FIGARO, for instance, allows you to calibrate in wavelength in 2-D which is very useful, specially if you are working with extended objects. You can then extract 1-D spectra and 1-D sky to subtract, and you will be ready to eliminate atmospheric absorptions, calibrate in flux and write your papers.

Wed Apr 6 22:56:39 BST 1994