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Re: NSV stars in DS23
One thing that people should realize (I know it is obvious, but
perhaps not to novice variable star researchers) is that the
NSV etc. lists are *suspected* variables. In many, many cases,
the star is later found to be constant. New novae have been
reported that were ghost images or funny cosmic rays, unfiltered
observations of red stars gave too-bright magnitudes, etc.
So be careful what you do with such matches. Just as for the GCVS,
many of these have poor coordinates, and you have to match magnitudes
and colors as well. Unlike GCVS, you don't have known variability
and period to key in on.