CY Aqr

[<aah@nofs.navy.mil>]

I've posted on
ftp://ftp.nofs.navy.mil/pub/outgoing/aah/tass/cyaqrv.gif
a light curve for the delta Scuti star CY Aqr, taken on
000919 UT with the ARNE TASS Mark IV camera.  Conditions
were light cirrus, so the raw instrumental magnitudes
varied by a few tenths of a magnitude.  I was using
2 minute exposures with the 10cm lenses; the Poisson
noise should be less than 0.01mag on this 11th magnitude
object.  Some of the scatter is caused by the clouds
(they show through, even with differential work);
some is caused by a sticky V shutter. I bet the funny
feature around hour=7.5 is probably caused by flatfielding
(I had to use the next night's flats).
  Still, not bad!  This shows that the TASS cameras can
do some real scientific monitoring as well as variable
star discovery and all-sky photometry.
  If you want to see an equivalent light curve taken
with the 1.0-m telescope, look at
ftp://ftp.nofs.navy.mil/pub/outgoing/aah/photom/cy_aqrv.gif
Arne