[vsnet-chat 4576] Re: new Tycho variables & HD 235749

[crawl@zoom.co.uk]

The NSV Supplement is invariably missed out in these searches, despite
containing 10,000+ objects.  Last I tried a search it wasn't in SIMBAD, so
professional authors often miss them.  Indeed, last time I tried for a
specific "old" NSV object in SIMBAD [ie NSV <15,000] I had no success:
although there are many NSV objects in SIMBAD, it is not complete with
regards the "old" NSV.

What's is strangest with this Tycho work is that the list I sent earlier
actually contained a couple of stars that are in the latest versions of the
GCVS though the authors' missed them, one example being V0409 Lac.  This
star is actually from Namelist 74, a namelist devoted entirely to Hipparcos
variables.

As some of the authors appear to have been Hipparcos team members at one
time, it is a bit strange for this work to have missed Hipparcos variables
from their cross identfication work.

One of their main cross identification references is to the catalogue of
delta Scutid stars, which may suggest that they expected to mostly find
matches for the numerous "microvariables" that Hipparcos detected, objects
with periods that are unsolvable using only Hipparcos and/or Tycho epoch
photometry.

John

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