MANUAL INSTRUCTIONS

OPENING THE OBSERVATORY
Before starting, I recommend opening up a looong xterm to display the output of the observatory server tserver by typing:
show tserver
Keep this window open to monitor the status of the telescope and all the devices.

Then in a second xterm type:

openup
This 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=3600
or 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.

POINTING THE TELESCOPE
Before using the telescope remember to turn on the tracking by typing:
tx track on
The 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=yyyy
Where 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
TAKING A PICTURE
Before taking a picture you should check that filter is in the proper position. If you want to use the V filter type:
pfilter V 

To take a picture with a 10 second exposure time type:

 image time=10
It will then write a FITS file in the current working directory with the name image.fits You can use the tv command or ds9 to display it.
ZEROING (SYNCING) THE TELESCOPE
If you find that the telescope is consistently pointing off from the center of the CCD in a consistent manner you can adjust the telescope pointing constants to make the centering better using the following: This will adjust the values of the additive pointing constants cra and cdec to give better pointing.

Note: ideally these constants are near zero degrees.

SOME OTHER THINGS
TROUBLE SHOOTING
You can view the finder telescope as VIDEO 2 in with the axis video server the login is the usual anonymous/guest. The finder image can be converted into a FITS file using the fimage command. It produces a file fimage.fits which 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=on
I leave it as an exercise to figure out how to turn them off.

Other things to check:

CLOSING DOWN THE OBSERVATORY
When you are done observing for the night type:
closedown
Then close down your windows.

Instructions Index