3. In '''Exposures & Guiding''':
* Move GUIDE MIRROR IN BEAM by clicking on that box. Alternatively, if using SpUpNIC, click on the guide mirror in the instrument schematic on the SpUpNIC Control GUI to move the mirror.
* Click '''Expose''' and select exposure time from drop-down menu to start images.
* Under “Image Options” select the preferred LUT and SCALE.
9. Once the star is well positioned on the science detector, select a guide star.
* Ensure that XY slides have been initializedcentered. (Click "InitializeCenter" under XY slides control).
* Open the guide star software (the icon of a star with a long tail).
* Enter coordinates of the field and click "GET IMAGE". A window should appear with a 10x10 arcmin DSS map.
**NOTE: this chart is centered on the coordinates. If you have adjusted the position of the target to be away from the center of the acquisition frame, there will be the same offset in whatever guide star is selected.
* Under "XY Slides Control," click "GoTo GS". The star should appear in the acquisition image. If not, try a different star.
* Under “Pointer" click "Guide Star" , then click on . The software will automatically choose the chosen guide most appropriate star in the acquisition camera FOV. This will and put a dark blue box around (guide point) upon it.* Press GUIDE on the star and begin Exposures & Guiding box to start guiding.
** NOTE: if the star is near a hot pixel, that could cause trouble with guiding. Click "Move XY" and click on the star: this will center it (just moving the XY stages, and not effecting the science target).
* To stop or restart guiding (e.g. after brief intervals of cloud), press GUIDE.