[vsnet-id 29] (No Subject in original)

[bas@lowell.Lowell.Edu (Brian Skiff)]

     In the clear light of day, I have re-examined the case of V898 Cygni,
which I was not able to identify with certainty last night.  I first checked
several 33cm astrograph ("Pluto Camera") plates in both blue and red light to
look for obvious variability.  This was not fruitful, however.
     Next I found that we have all three POSS-II films for the field.  Even
though they are taken on different dates, I had hopes that the star would
show itself by its red color.  Indeed on the IV-N plate (roughly I band),
the star stands out clearly compared to both the red (F) and blue (J) plates.
     V898 Cyg is the northern star of a close (~2" pair) located at:
19 34 00.1  +30 52 57 (2000), which I estimated using a SkyView DSS image.
This is some 11"-12" northwest of my original candidate.  On the blue POSS-II
plate it and the companion south are nearly the same brightness (mb ~19?), but
on the infrared plate, the northern star is several magnitudes brighter while
the southern star is nearly the same.  Given Wachmann's long period for the
variable, it seems reasonable to suppose this is a red star, so the
identification seems secure.  There is no IRAS source here, nor is any 2MASS
data yet available for this area.

\Brian

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