[vsnet-alert 14088] Re: [cvnet-outburst] Re: outburst of X-ray source 1RXS J074112.2-094529

[hambsch at telenet.be]

Dear All,

which kind of B band filter is it?
I have one from AStrodon and it has a IR leak so for red stars the B information is wrong (had this problem for one of the recent novae).

regards,

Josch

----- Originele e-mail  -----
Van: "Seiichi Yoshida" <comet at aerith.net>
Aan: cvnet-outburst at yahoogroups.com
Cc: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp
Verzonden: Maandag 9 januari 2012 13:28:33 GMT +01:00 Amsterdam / Berlijn / Bern / Rome / Stockholm / Wenen
Onderwerp: [cvnet-outburst] Re: outburst of X-ray source 1RXS J074112.2-094529

Dear Sebastian Otero,

Thank you for your comment.

I asked Hidetaka Sato on B-band magnitude. He commented that the B-V
value seems strange. But the star actually looks brighter on the
B-band images. So maybe the star is really bluish. Anyway, Sato-san
will re-measure, or re-observe this star in the near future.

Well, the observation time was Jan. 9.104, 2012 (UT).

Best regards,

> > Hidetaka Sato observed multi-band photometry today and revealed this
> > star is bluish.
> > 
> >  B: 14.02 +/- 0.04
> >  V: 14.74 +/- 0.04
> >  R: 14.55 +/- <0.01
> >  I: 14.36 +/- <0.01
> 
> The B magnitude looks spurious, since a B-V of -0.72 is impossible...
> B= 15.02 would be more consistent with the rest of the colors.
> 
> Cheers,
> Sebastian
> 
> -------------------------
> Sebastian Otero
> VSX Team
> American Association of Variable Star Observers

--
Seiichi Yoshida
comet at aerith.net
http://www.aerith.net/


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