Check Telescope Pointing by taking a Lucifer Science Image and running ptcorr

Jan. 2011: At the beginning of the night, the Operator will go to a star near your first target and tune up pointing and collimation, so you don't have to do this.

1. Find a pointing star.

In telescope Control gui,

Click on LOAD CATALOGUE

LOAD TARGET FILE

This brings up another gui, Look in

observer

TargetCoordinates

PointingStars.tab

Select a star near your first target. Unfortunately, it does not do this for you.

Commit Star

Close PointingStars.tab

2. Go to the Pointing Star

Click SET TARGET

SET GUIDE STAR (we won't be guiding)

Rot-Mode = Parllactic Tel-Mode = track Set Telescope Commit Telescope Set Up --> This MOVES THE TELESCOPE TO THE SELECTED STAR.

3. Manually take a short (2 second) image

FW1 = BR gam

FW2 = CLEAR

COMMIT INSTRUMENT SETUP

in New read out setup gui:

DIT = 2 sec then hit SET NEW VALUES

START READ

4. Go over to the NX-Observer machine and look at the image in SKYCAT

Click on the NX-Observer box
at the bottom of the Sun screen. This takes you to the Lucifer Computer

To return to the obs2 computer, put the cursor in the upper right hand corner of the right hand monitor and CLICK.

The image you just took should show up in the SKYCAT window. Note the number of the fits file.

5. Go back to obs2 and run ptcorr in IRAF.

lauch iraf by going into shell and saying cl.

epar LBTTOOLS and make sure UTDATE is today's date, e.g. 20100107

LBTtools

Lucifer

ptcorr <Fits file number>

The image will appear in DS9.

Zoom to locate pointing star. CLICK TWICE on the image of the star, and delete the green region circle that you create. This should send CA and IE corrections to the telescope.

It will try to centroid on the star, and failing that, take your cursor position, compute an offset and send
the offset to the telescope.

J. Bechtold, F. Bian E. McLinden Jan 2010
Topic revision: r3 - 08 Jan 2011, XiaohuiFan
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