[vsnet-chat 4679] Re: [vsnet-newvar 1030] re Bernhard Variable 92

[Klaus Bernhard <kl.bernhard@aon.at>]

Dear John, Dear colleagues,

I also think, that both indications (B-R from USNO A2.0 and the 
apparently slow variation, deduced from about 10 observations 
in different nights within 1-2 months), which I take for classification
as a "SR"-variable are not unambigous.
If a "SR"-variable would be in fact a short period variable, 
there could arise wrong B-R values, even if the epochs of the plates 
differ only few days.  
So I always mention in the VSNET-postings, that the colour and the
apparently slow change in brightness "suggest" a SR-variable.   

But I see, especially because of the X-ray source BrhV84 
(a "SR-variable" transformed in a likely short period variable) that I have to write instead of 
"Other types of l o n g period variability cannot be excluded"
in future
"Other types of variability cannot be excluded"
in my VSNET-postings. 

Best wishes,

Klaus Bernhard

> 
> The epochs of the USNO A2.0 plates that this variable appears upon are
> dated 1979 for the blue one and 1984 for the red one.
> 
> Using magnitudes from two totally different epochs for an avowedly variable
> object in an attempt to decide a colour index and subsequently a
> variability class is a somewhat problematic exercise.
> 
> John

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