
Searching for high-proper-motion stars...

I start with a rule to select reasonable input objects:

(Nmeas > 2) && (Nps1 > 2) && (Trange < 180)

this gives me a set of input 'objects' which I would like to link together.

** there is likely to be some leakage for objects which are going
   slowly enough that Trange 180 - 400d.  Anything with Trange > 400d
   is probably slow enough for the regular p.m. search.

foreach catalog:

  * select / mark the objects which meet the criteria
  * loop over all objects
    * for each object, find all neighbors within R < 10.0 arcsec (TBD)
    * if (N < 2) continue to the next object
    
    * accumulate complete array of X[i], Y[i], T[i] for all measurements from nearby objects
    * fit X[i], Y[i], T[i] (+ parallax? probably can skip on first pass?)
      * outlier reject
    * if (Nfit / Ntotal) > X.X && (Chisq < XX) keep this object (mark with a flag)

    * save object groups to a dvo db like high-speed?

