Checking these boxes when designing your AORs does
NOT imply that you will get a spectrum of your source with both orders
of SL or both orders of LL. Selecting this box will result in your
source placed exactly between the two SL subslits. As a result, if you
have a point source, you will not get a spectrum of your source with
either module. Instead you will get a SL1 spectrum of the sky on one
side of the point source and a SL2 spectrum of the sky on the other side
of the point source. The "both" box is in general used for spectral
mapping observations of extended nearby sources where your extended
galaxy or supernova remnant fills both subslits and you take a spectrum
of half the source with one order and half the source with the other order.
Gillian Wilson
2006-11-09
