Notes

• A suitable flat-field spectrum, arc spectrum and standard-star spectrum should previously have been reduced and filed with the calibration system.

• It is recommended that the observation types of the observations are set to OBJECT and SKY as appropriate. This is inconvenient if you wish to set up a sequence using an offset iterator in ORAC-OT, so any frames with a telescope offset greater than 30 arcsec will be assumed to be a sky position.

• Variances are propagated if KAPPA 1.0 or later is available. A warning is displayed if variances are lost.

• Any number of sky-object pairs in any jitter pattern may be used.

• A variant of this recipe, MAP_EXTENDED_SOURCE_NOSTD, is available which does not divide the spectrum by a standard-star or flux calibrate the spectrum. It may be useful to specify this recipe on the command line when running ORAC-DR if you choose to defer observation of your standard until after you have observed your object.