[vsnet-gcvs 168] Re: GCVS errors for CVs

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

> The positions I quoted are from Henden and Sumner. They are primarily the
> ones that are grossly different than the GCVS positions. There are some
> subtle differences to the D&S online catalogue as well. That is the reason I
> included the link to the sequences. There are notes in the text files
> explaining these subtle differences.
> 
> There are a few more, like KZ Gem and EG Lac that the positions are still
> undetermined. I did not include them because they have not been positively
> identified.
> 
> My main intent was to respond to the suggestion that the GCVS and other
> online sources could be updated if new or more accurate information came to
> light.

    One must be careful in incorporating these *corrected* positions,
since some fraction of these identifications were made based on their
colors (those resembling CVs) only.  In many cases (especially when the
field is not crowded) this approximates the right identication, but
they need to be confirmed by future outburst detections.  In some cases
the original CV classification may have been incorrect (as in V800 Aql)
or even non-existing (as in V890 Aql), both of which were positively
identified with the same "blue star" criterion.

    I presume the editor of the GCVS is more conservative (and I think
it an appropriate attitude of the editor of the original source catalog)
in incorporating these new identifications, than those managing the online
CV catalog of Downes et al.  Even if these identifications (without
other verfications) are not directly incorporated into the GCVS, I don't
think it a fault of the GCVS team.

Regards,
Taichi Kato

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