See also the complete list of LIRIS user commands and the UltraDAS commands for the observing system.

To move the Acq/Comp mirror out so that LIRIS can see the sky:

SYS> agmirror out

To move the Acq/Comp mirror in to take Calibrations:

SYS> agcomp

See the available filters and Imaging Scripts

To select a predefined imaging mode, whereby all the wheels will move into the correct position for the chosen filter:

SYS> limage <filter>    

See the available grisms and slits and Spectroscopy Scripts

To select a predefined spectroscopy mode, whereby all the wheels will move into the correct position for the chosen grism and slit:

SYS> lspec <grism> <slit>  

To move only a slit into position, but leave the other wheels unchanged:

SYS> lslit <slit>

To move only a grism into position, but leave the other wheels unchanged:

SYS> lgrism <grism>

SYS> lipol <filter>      See the available filters

N.B. Parameters in square brackets are optional.

The run command takes an exposure and saves it to disk:

SYS> run liris <int time> ["title"]

With multrun N exposures are taken:

SYS> multrun liris <N> <int time> ["title"]

The following variants of the run command do essentially just the same but set the OBSTYPE FITS header keyword to a different value. Also, in the nightlog this image type is then highlighted. These commands are:

bias liris
arc|dark|flat liris <int time> ["title"]
multarc|multdark|multflat liris <N> <int time> ["title"]
 
To take temporary data which is overwritten the next time the same command is invoked (useful for checking and finetuning target positions or for checking exposure times):

SYS> glance liris <int time>

The eposure is saved as s1.fit.

SYS> multglance liris <N> <int time>

These are usually done by the telescope operator (OSA) but they can also be run by the observer from the pink window, but please check with the telescope operator first:

To add a new object to the catalogue:

SYS> object <object_name> <ra(hh mm ss.ss)> < dec(dd mm ss.ss)> <equinox> 

(e.g. SYS> object star 20 10 0.3 25 3 8.6 J2000)

SYS> add

To move the telescope to the just-entered object:

SYS> next

To move the telescope to an object if this is already listed in a catalogue which has been loaded into the TCS:

SYS> gocat <object_name>

To offset the telescope by a small amount, in arcseconds:

SYS> offset arc <x offset><y offset>  

(e.g. offset arc 10 10    will offset the telescope by 10" in both x and y).

N.B.  THESE OFFSETS ARE ALWAYS ABSOLUTE, NOT RELATIVE!

To show detector status and temperature of the monitoring points

SYS> detstat liris

To show mechanisms and LIRIS controller status:

SYS> lmchstat  

The configuration of all internal LIRIS wheels can be checked with:

SYS> lwheelconfig