N&S Mask Design Change - 070514
Read carefully: Standard configurations for IMACS f/2 and f/4 cameras
You must make your slitmasks use the latest version of the maskgen -- the mask making software. Instructions for designing masks and downloading software to do this are found. Old N&S masks that you might have planned to use on future observing runs will not work! You must use the latest version of maskgen to remake these. (All the input parameters can be the same, but different Shack-Hartmann and Principal guide stars must be chosen.) The slits for the new mask will run up-down rather than left-right as previous. New masks need to be submitted for cutting per the normal rules.
All future N&S masks will automatically be made this way by selecting the appropriate choice in the intgui (see the latest maskgen instructions).
Observers using f/2 in the regular "stare" mode are not affected by these changes. Their masks, old and new, are fine, and they will produce spectra along the long axes of the CCDs, with fewer CCD gaps per spectrum.
Spectroscopic observations at the IMACS f/4 camera will continue with the Mosaic Camera in N&S orientation.