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[vsnet-j 397] Possible Nova in Pup
- Date: Tue, 2 Jan 2001 00:29:33 +0900 (JST)
- To: vsnet-alert, vsnet-campaign-nova
- From: Taichi Kato <tkato>
- Subject: [vsnet-j 397] Possible Nova in Pup
- Cc: CBAT@CFA.HARVARD.EDU, GREEN@CFA.HARVARD.EDU, kazuyoshi.kanatsu@nifty.ne.jp, vsnet-j
- Sender: owner-vsnet-j@kusastro.kyoto-u.ac.jp
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