RE: Question (of course)

["Creager, Robert S" <CreagRS@LOUISVILLE.STORTEK.COM>]

Tom and all,

I think that this what I'm asking.  My plan would be to use Tycho-2 to
calculate the transformation from x,y mag to ra,dec mag with a subset of the
stars found and then (mumble mumble hand waving) and then creating a
"Tencat" catalog from the data.  I haven't figured out what the hand waving
is all about, or if it's needed :-)

Cheers,
Rob

> -----Original Message-----
> 
> 
> Thinking about it, I suspect that Andrew and Rob are thinking of two 
> different things.  The Tycho catalog is used to match stars 
> that have good 
> position and pretty good photometry.  I think we get lots of 
> stars that are 
> not in the Tycho catalog.  We start using the Tycho 
> magnitudes as points in 
> our "fit".  Later we generate our own catalog.
> 
> I am just answering this to try to get Rob pointed in about the right 
> direction.  I hope someone else will explain it better.
> 
> Tom
> 
> At 05:24 PM 12/27/00 -0700, you wrote:
> 
> >Hey all,
> >
> >I was wondering if we all should use the same catalog to 
> 'find' the stars in
> >the Mark IV images?  Would this make it easier to determine 
> the differences
> >between methods?
> >
> >Rob
>