Target acquisition

An observer noted that it was not clear what the scale was on the images provided in the fiber-viewing movie which made it hard to decide what step-size to use when trying to center a star. The script that displays the movie images and also draws the cross centered on was changed to include a line and the corresponding size showing the scale on the screen.

The use of narrow-band filters was tested for acquisition of very bright stars on the FIES fibers. This to be able to use longer exposure so the images are less effected by scintillation affects and the stars can be better centered on the fiber, in order to not introduce shifts in the radial velocity. Using a narrow-band filter turned-out not to be adequate, and in the end a solution was found using a Strømgren y filter and a ND=2 neutral density filter.

It is planned to speed-up the target acquisition process by doing the first full-frame StanCam image in binned 4x4 mode, instead of binned 2x2.