[Aavso-photometry] BZ UMa: BDG and MXL data agree closely !

Richard Miles rmiles.btee at btinternet.com
Mon Jan 17 08:23:43 EST 2005


I've uploaded my first (unfiltered) results set.

For some reason the software saw my data as being 'Visual' even though I put 
the correct name (CV) in the text file.  I think the reason for this is that 
I have submitted to 3 d.p.'s and the software can only see up to 2 d.p.'s 
and therefore misses recognising the detector type correctly

In lightcurve generator it is therefore necessary to tick Visual as well as 
the CCD boxes.  Highlighting MXL observations and you'll see the degree of 
agreement with BDG is at better than the 0.01 mag level during the first 
part of my run which covers 3387.364-.447.  It confirms the fine structure 
seen in BDG's data is largely real.  Later on we were both affected somewhat 
by cloud.

N.B. I have used my unfiltered calibration from last year to adjust for the 
fact the observations were unfiltered so as to put them on the Johnson V mag 
scale - good to about +/-0.01 mag.

Next will work on my filtered data, which were taken with only 60mm aperture 
so will be relatively noisy, I imagine.  At least an accurate measure of V-I 
could be the really useful finding here.

Richard Miles (MXL)





More information about the Aavso-photometry mailing list