Aladin.
With Exposure 1 selected in the APT Tree Editor, we see that
our Orientation is good, but that the pattern is not centered on
the galaxy.
We grab the aperture and move it to center the middle tile on the galaxy. Note that all pieces of the pattern move in conjunction with the single aperture we adjust. Going back to the APT window, we see that our coordinate change is listed as a pending change, which we now commit to the proposal.
However, we noted that the overlap between the NIC2 positions is too small. We switch back to the
Form Editor and select
the LINE pattern to review the parameters. Our point spacing
of 20" is too large, so we change it to 15"
Going back to the Aladin window, we now see that the overlap is sufficient, and the galaxy coverage is good enough that we do not need to add an additional tile.
