[vsnet-campaign-dn 1333] WZ Sge 010822

[aah@nofs.navy.mil]

I've placed on
http://ftp.nofs.navy.mil/pub/outgoing/aah/phot/wzsgeuh.gif
the U-band light curve for 010822.  As you can see, there
were no real eclipses or humps, just a steady decrease in
brightness until bottoming out around 0900 UT.  Some of
the scatter towards the end of the run was due to clouds;
I will work a bit harder to recover some of that photometry.
  John Thorstensen mentioned to me that there is a proper
motion known for WZ Sge from the Luyten blue star survey
(Luyten, W. J. 1969, U. Minn):
    pm RA  = +0.077arcsec/yr
    pm DEC = -0.014arcsec/yr
If you use a typical epoch for the 1978 datasets, the variable
has moved almost due east about 2.2arcsec, which is why the
separation between the variable and its companion is now 10.9
arcsec instead of the ~7arcsec mentioned in the earlier papers.
You can even get approximately the right proper motion using
my 1995 dataset (wzsge.dat) along with the recent 2001 determinations
(wzsge.bright.dat); amazing how accurate CCD astrometry is.
Arne

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