[vsnet-chat 3006] Suspected UG stars

["Maciej Reszelski" <macres@pro.onet.pl>]

Friends,

Arne, Brian, Taichi, Timo  thanks !

I check my GCVS v1.2 and IR Lyr still have mark UG:. 
As Brian wrote UY Vul seems to be a red variable. Amplitude
taken from GCVS suggested Mira-type.
About DO Vul Timo Kinnunen wrote to me:

>  Hello Maciej,

>  I sent the following note to Patrick Schmeer to encourage
>observing DO Vul since it is a prospective SU UMa subclass
>candidate - however too faint for my visual observations.
>Also SW Vul is very faint.

>  Hello Patrick,
...
>  I browsed today a Tschesevich's book describing some
>variables in Aquila (Tschesevich 1978, written in Russian).
>He described two familiar dwarf novae: SW Vul and DO Vul.
>In both cases several outbursts of 16mag were recorded,
>but whereas SW Vul is a frequenter (per.~15d), DO Vul
>outbursts were infrequent. Tschesevich suggested a period
>around 90 days, but the obs. record did not show outb. intervals
>shorter than ~270d. Some of the outbursts lasted more than 8d.
>Certainly the period may be similar to RZ Sge, but I suspect
>this is anyway a likely SU UMa subclass candidate. The average
>period falls close to one year, so we may have to wait for years
>for a plausible superoutburst.
>  The outb. magnitude is beyond my scope, so I'm afraid I will drop
>DO Vul from my regular targets.
>
>Regards,
>Timo Kinnunen
>

DO and SW Vul seems good CCD-target for the future !

Best regards,
Maciej




Maciej Reszelski
Al. 1-go Maja 29/4
64500 Szamotuly
Poland
E-mail: macres@pro.onet.pl
www : http://republika.pl/macres

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