Target coordinates and CCD read-out size:

Here you enter the target coordinates. If you pick an ObjectName that is Simbad-resolvable, hit 'enter' after you filling out the field and wait for the data retrieval. Alternatively, you can specify RA and Dec (2000.0) either in natural units, i.e., degrees, or you might enter RA and Dec in sexagesimal format, using colons as separator chars, i.e., 4:54:53.86 for the right ascension. For the spectrograph, the V magnitude is also required. B-V and proper motions are used if stated.

To ease the selection of the read-out window, a few standard setups are provided in the Camera section. To avoid that your target object is exactely on the amplifier edges, a pitchdistance and pitchangle are pre-defined. With the advanced settings, different geometries might be achievable. Note the two-amplifier readout on the current CCD, implying an x-size of only half the required size. The window offsets are in pixel from the upper-left corner. The entire chip is 4100x4100 pixel (including some ovserscan).

Both telescopes are equipped with a piggy-back guider scope. The Extra focus, if tagged, issues a focus sequence prior to the science exposure. The time accounts to the user's granted total allowance and amounts to an extra time of typically 50 seconds. Check pointing allows the user to verify the pointing on the imager and the detection of close bright twin on the spectrograph. See How to gurantee guiding for details.