The forbidden region is my estimation of where objects would have
spectra with blue ends that fell off the right end of the detector, 
based on the combination of the slits and the 2-D spectra. Looking again at
the mask making software, I must be misunderstanding somthing since
the software does select objects nearly to the right end of the
image. My version of the software shows the displacement between
the slits and the central wavelength to be much larger than I measured
it to be.         

   The colors refer to priorities, blue objects are our top priority,
the green objects are the second priority. 

   Bob and I are trying to design a two-tier masks right now
and I am clearly struggling with my understanding of how the slits
map to the spectra. I suppose as long as I have the minimum
separation correct we are OK, and I think that I have that in hand.

  Any advice from the instrument maker would be most welcome!


Bob - I think that I have a workable mask. I'll put the
ODF file on in the masks directory, it is called:

    newODF1.cat   newODF1.fits (I have not touched the fits file)

I have also made an IRAF script that shows the slits and  spectral
extent. I will put in the same place, it is called:

    display_slits.cl

It grabs info from the .cat file and uses tvmark to show the slits.
When you run it, it asks you to edit two lists, one should just
have the priority 2 objects (4th column) and the other has just
the priority 3 objects. This mask has 2 setup stars so it should be
OK.

   All of these files are in the top level masks directory. Let
me know if this is not clear. We still have to do the last bit
of Inger's magic once the slits are set to push the objects
off center, I think(?).

Pat


I deleted the following ID numbers:

208
580
598
670
414
418
460
242
260
135
800
1014
1009
786
1012
660
652
703
534
536
520
491
405
337
320
157