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Re: TASS Database, Store ra,dec Sigma or not?




  Chris asks "is there a real reason to store the uncertainty in 
position for TASS stars?"  

  I think that people probably won't search on this quantity;
most people who want to pick stars which are DEFINITELY real 
detections will search (obs_count > N), where N = 10 or 15 or
something.  
  
  As long as we store the sum of the squares of the positions,
then we can re-construct the standard deviation as needed.

  My vote for option #3 -- don't save it.


                                  Michael Richmond