The new MaskGUI
The code modifications enable the (automatic) use of a curve reference
file which approximates the observed shape of the spectra and is shifted
to best match it. The sky windows are now being computed with the same shape
as the curve reference, and offset from the observed spectrum by a fixed number
of pixels (different for the UT and AT cases). In order to visualize the
choice of the sky windows (hidden in oirChopPhotoImages.c), maskgui has
been modified to display the sky window borders.
In the new version of the mask GUI, yellow (curved) lines delineate the areas
above and below the spectrum used for the sky subtraction. They are only shown
if either Photometry A or B are selected for the background image.
Furthermore, by dragging the cursor across the drawing area, brightness and
contrast change so that they can be adjusted for better background display.