[vsnet-chat 2030] Re: CV Aqr

[Taichi Kato <tkato>]

Re: [vsnet-chat 2029] Re: CV Aqr

   There seems to have been confusing history in CV Aqr.  CV Aqr was
discovered from Harvard plates, whose identification chart was published
in PASP along with correct identifications of UZ Boo, V699 Oph etc.
The famous Vogt and Bateson southern dwarf novae atlas concluded the
absence of a blue star near the position, neither outburst record by
the VSS RASNZ members.  They suggested a nearby red star (*1) may have
caught when it brightened.  However, the AAVSO issued a chart, after
examination of the original discovery plate, which closely agrees with
the PASP chart.  It seems the positional problem (of the original object)
seems to have been solved.  The nature (and present counterpart) remains
to be clarified.  Interestingly enough, Glasby published a light curve,
showing several "outbursts".

(*1) The star is included in NSV as a separate entry from CV Aqr.

GSC5785.398 212145.09 -141806.0 (2000.0) 13.13 0
USNO0750.20848046 212145.051 -141805.22 (2000.0) 13.4 13.4
212144.9 -141804 (2000.0) NSV25567 VAR: 13.1 - P -

   The USNO color contradict with Vogt and Bateson's "red" description.

   I have been wondering whether the observed historical outburst of CV Aqr
may coincide with some asteroid, just as in TU Leo and V890 Aql.

>   For the 3rd catalog of cataclysmic variables, I'd rather
> see a table of 'confirmed' stars, followed by a table of
> 'suspected' variables.

   Most of recently recognized CVs are spectroscopically or photometrically
confirmed ones.  The major source of problems is, as is often met, old
variable star reports without sufficient information.

Regards,
Taichi Kato

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