
- select a region

- load average / measure / secfilt / missing

- construct subset based on selection criteria:
  - Minst
  - dMinst
  - X,Y
  - R,D

- merge neighbor stars (join within X.X arcsec)

- mark bad measurements:

  - outside area
  - Minst < cutoff
  - Mcal > 0.015 (lookup from table?)

  - subset for given filter (match by string?):
    - 2x 3sigma 
    - softened chisq > 3.0

- mark objects with fewer than N measurements


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