[Aavso-photometry] SU TAU

[Brian C. Barnes]

I've recently added SU TAU to my list of variables I'm monitoring. The AAVSO
chart (SE0401) lists SU TAU as 05 49 03.7, +19 04 22 (J2000.0), with a
rather bright (but unlabeled) star to the NW. At the given location I've
found a rather bright star, of approx. 10.11 MagV. I've noticed that lots of
folks have submitted observations for this star. My problem is that,
according to my copy of the GCVS, SU TAU is actually at 05:49:23.37, +19 04
04.78, south and east of this brighter star. According to photometry of my
image, at the GCVS location is a star, but it is too dim in my image (20
seconds) to get any MagV data on - my dimmest star is MagV 15.83 +- ~.5.

So my question is, is the AAVSO chart correct and the GCVS catalog is wrong,
or is the GCVS correct, and lots of folks have been submitting observations
for the wrong star? I'd like to be certain of my data.

Brian C. Barnes