show tserverKeep this window open to monitor the status of the telescope and all the devices.
Then in a second xterm type:
openupThis script will open the slit, check that the devices have been homed, open the telescope mirror and generally prepare for observations. When this command is finished type:
keepopen maxtime=3600or whatever number of seconds you plan to observe. Leave this program running to keep the slit open. Shrink the window to a small size.
Finally open a third command window to type your commands.
tx track onThe tracking only turns on for an hour, so this command will have to be repeated occasionally.
To point the telescope type:
tx point ra=hh:mm:sss dec=dd:mm:ss equinox=yyyyWhere the Right ascension and declination are in sexagesimal format, with no embedded blanks.
For example to point to Arcturus (in current coordinates so I have omitted the equinox) type:
tx point ra=14:15:57.78 dec=19:08:53
If you are lazy, you can do some tricks using the script dopoint and the star finder program bright to make the same command.
bright ra=14 dec=19 faint=1 | dopoint
To take a picture with a 10 second exposure time type:
image time=10It will then write a FITS file in the current working directory with the name
image.fitsYou can use the
ds9to display it.
tx point ..to point to known star
tx offset ..to center the star
tx zero last
cdecto give better pointing.
Note: ideally these constants are near zero degrees.
tx help- will list all the telescope server commands
tx xxx help- to list options of the
tx focus mm=-6.1- will set the telescope focus position to -6.1 millimeters
tx offset dec=.01 ra=.01 cos- will move the telescope .01 degrees in dec and ra
tx dome center- will ensure the dome is still looking out the slit
tx where- will show where the telescope is pointing
lst- will print out the current local sidereal time
fimage.fitswhich you can inspect with your favorite tools. The star should be on finder pixel row=177 col=335 when centered on CCD.
If you want to look at the telescope turn on the room lights type:
tx interlocks lamp=onI leave it as an exercise to figure out how to turn them off.
Other things to check:
tx dome center
tx stage x=0 y=0
closedownThen close down your windows.