[vsnet-alert 5493] Possible Nova in Pup

[Taichi Kato <tkato>]

Possible Nova in Pup

    The accurate position provided by H. Abe agrees the position of a 14-th
mag USNO star within 1-2 arcsec.  If this star is indeed the progenitor
of the erupting object, the color from the comparison between the visual
and 2MASS magnitudes becomes V-J = +2.  The color is not particularly red
in this field.  Even assuming that the object is not significantly
reddened, the color is still bluer than most of symbiotic stars, which
have V-J colors of +3 to +5 or even larger.  If the object is a nova, the
color suggests either a) usual cataclysmic variable with moderate reddening
or b) cataclysmic-type binary with a relatively evolved secondary.
[e.g. U Sco (Porb=1.2d) has a V-J color of +1.5].

Regards,
Taichi Kato

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