[vsnet-chat 1347] [AAVSO-DIS] Re: Graham E-region standards

[Berto Monard <lagmonar@csir.co.za>]

Dear all,

With the response properties of CCDs as they are, V-R photometry is
certainly the way to go especially with small sized telescopes. I also
believe that R measures (as compared to B) are less affected by
atmospheric effects. 

But since the sensitivity of a dark adapted eye falls in between V and
B (except for Japan maybe...), how do we convert V&R measures to
visual sequences? 
Perhaps we can give some attention to this in anticipation...


Regards,

Berto

>>> "William S G Walker" <astroman@voyager.co.nz> 10/02 12:52 AM >>>
Brian and all,

skip...skip

With the ST6 LX10 setup you don't have the luxury of a field eyepiece
for
exact positioning and must rely on the finder. As well, the B response
is
rather poor at 
magnitude 13 so we're using V-R to calibrate things. All of this takes
a
little time to get used to hence the delays in production. But Bruce
Sumner
and I are hoping to get a number of fields down to V = 16 in the not
too
distant future. 

So what I'm saying is that some slow progress is being made. Within a
few
months we hope to be producing a respectable number of results for
visual
observers. And if anyone knows of anything useful a note would be
appreciated. Did Graham or anyone do a similar job on the F Regions?

Regards,
Stan

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