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* LRIS NOTES *
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first round 10.11.99
updated 01.10.00
and again 10.08.02

1.  Get the login info off of the wall.
		
2.  Start up all the lris windows by clicking on the right
    mouse button, selecting "lris control menu", and then selecting
    "startup all lris control".  A bunch of windows will pop up.
    In one of those windows, you will get prompted for various
    questions with mainly obvious answers.  

    This presumes that you're starting up lris from scratch.  The
    startup procedure can be more selective if you're just restarting
    some of the software.  During set-up, a data directory will
    be suggested.  Take the suggestion, and make a note of it.

3.  Move each mask in turn.  Turn on a lamp (neon's fine).  Take
    1s exposures with the trapdoor closed, the mirror in, through
    the clear filter.  When these read out, verify that the right 
    masks are what you think they are.  Use the fwhm key ("s") to read
    off the box positions; note them for both red and blue side.
    (More than likely, you'll set up slitmasks on the blue side, 
    but grab the red side just in case.)  

    At some point, make "xbox" files with the alignment star
    coordinates.  The format should be something like ndwfs10.xbox_b:

                    2531    1937    s76
                    1509    2873    s77
                    1187    2964    s07
                     543     927    s70

    For each mask, make a separate file for the red and blue sides.

4.  Check wavelength coverage.  NeAr lamps are good choices.
    Take 1s exposures and play with MSWAVELENGTH until you're
    happy.  (One strategy:  check that your reddest [rightmost]
    priority object on the slitmask has a starting wavelength
    just shy of the intended dichroic, and check that your bluest
    [leftmost] object goes out to, say, a micron.)

        ......go eat dinner, wait for twilight, maybe take flats/biases....
 
5.  Focus.  Set-up for R-band imaging on the red side;
    clear is okay on the blue side.   Put in the "focus"
    holes" mask and check that the exposure time is okay
    by taking a test image (3s? 10s? 20s?); make sure 
    not saturated.

    Run focus loop separately for red and blue side by
    selecting "focus loop" under the CMD button on the 
    red and blue control panels.  Check that the central
    wavelength and step sizes are satisfactory, then go.
    The focus loop will consist on 7 images labeled
    "rfocXXXX" and "bfocXXXX", respectively.
    
    When the focus loops finish, bring up xfocus under LRIS widgets
    (from the pulldown menu).  An IDL widget will pop up; IGNORE
    the "start" button.  Instead, pull down "file" and highlight
    the 7 focus images. When you hit okay, you will see the focus, FWHM
    and a fitting parabola read out.
 
    This is the focus for imaging in whatever filter you used.  
    Use the posted offsets to get the focus for slitmask spectroscopy,
    etc.

6.  Hit standard stars in longslit mode.  Cover all your spectroscopic
    set-ups, and remember to block 2nd order light with a filter
    or with the dichroic.

7.  Start taking data.  That is, go to your target, set PA, then
    run "malign".  For a slitmask, once malign is done, you have
    to acquire.  (See notes below.)  When last spectroscopic frames is done,
    tell the OA to stop guiding, then close the trap door and 
    take lamps and internal halogen flats. Typical algorithm:

        a)  Tell OA to stop guiding.
        b)  Close trap door.
        c)  Internal halogen flats first.  Take 4 or so 1 s exposures.
        d)  Arc lamps next.  (NeAr are preferred.)  You can slew to next
            target location while doing the arc lamps.
        e)  Lamps off.  Open trap.  Set up on new field.

    Probably, you have masks.  Here're ROUGHLY the details on how to set 
    them up.  Probably, you will set up on the BLUE side, so get the blue
    side into imaging mode, but leave the RED side in the desired 
    spectroscopic mode.

	1.  Go to field; give OA the PA.
	2.  Take a 10s (based on brightness of alignment stars) direct
	    image of field with BLUE side.
	3.  Identify alignment stars; use fwhm ("s" key) to measure position
	    of alignment stars.
	4.  During readout, put in slitmask.  
	5.  At command line, "movb x1 y1 x2 y2" where

		x1 = x position of star ON FIGDISP
		y1 = y position of star ON FIGDISP
		x2 = x position of star NOTED IN SLITMASK DIRECT IMAGE
		y2 = y position of star NOTED IN SLITMASK DIRECT IMAGE

            This moves the observed position of the star to the desired
            position behind the alignment box on the slitmask.

	6.  Take image through mask.
	7.  Run IRAF package "xboxb" to shift mask so that all the guide
	    stars appear in the alignment boxes.  (IMPORTANT:  You
  	    are using xboxb because you are setting up on the BLUE side.
  	    If you were setting up on the red side, you'd use straight
            "xbox".)
	8.  Take another direct image through mask.
	9.  Run xbox/xboxb for second order corrections. Go to spectroscopy
	    mode when the move errors get small, and comparable to their
            uncertainties.
	10. Do spectroscopy.  Dither in "guider x" between integrations.

8.  End of night: More standards.  Cover spectroscopic modes you missed before.
    Maybe some more domes and arc lamps through masks.  Write scripts for this.

9.  Close trap.  Throw in a filter for the helluva it.  Do maybe 10
    1 s bias frames.  Do science-length some darks.  Or not.  
    If so, do it with scripts.