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Hello:
1552+72 SS UMI JUL 02.9965 174 RZD CCDV
Diego Rodriguez= RZD
Chart indentifications : Astronomy and Astrophysics 242,397-400 (1991) ( CCD photometry of the SU Ursae Majoris cataclysmic variable SS Ursae Minoris (PG 1551+719)
Telescope 0.20m+CCD
CCD(V)(B)(R)(I) = Charge-coupled device with (V)(B)(R)(I) filter
M1 Group
Madrid (Spain
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Michael Linnolt wrote:
> 3. The AAVSO e chart significantly omits the star GSC2.2 11311333381,
> about 1 arcmin NE of 158, which actually appears visually brighter than
> the 158. Despite the fact their GSC2.2 magnitudes are (15.96blue/15.21red)
> compared to (15.73blue/14.77red) for the 158 comp. Any possibility one of
> these 2 is a variable?
>
My three measures were on 950405, 950605 and 950606, so over a timespan
of about two months. The two stars show no variability, and are
essentially the same visual magnitude (+/- 0.02mag):
V B-V
AAVSO 158 15.674 0.616
star NE 15.624 0.548
They also appear about the same brightness on the Downes, et al. finding
chart (see http://icarus.stsci.edu/~downes/cvcat). It looks like the
star NE was just omitted from the preliminary AAVSO chart; it may have fallen
underneath the label for the 158 star. Remember, preliminary means just that.
Arne
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