[vsnet-alert 15565] Re: CSS 100202:081936+191540 bright outburst

Arto Oksanen arto.oksanen at jklsirius.fi
Tue Apr 2 16:38:12 JST 2013


I observed this star last night from Hankasalmi observatory. It is still
bright (CV=16.3) and shows 0.3 mag (super?)humps with approximate period of
two hours.

arto


2013/3/31 Denis Denisenko <d.v.denisenko at gmail.com>

> MASTER-Amur has detected this dwarf nova in bright outburst on four
> unfiltered survey images today and two nights ago:
>
> CSS 100202:081936+191540
>   20130329.566  15.28C  MASTER-Amur
>   20130329.595  15.06C  MASTER-Amur
>   20130331.490  15.12C  MASTER-Amur
>   20130331.519  15.43C  MASTER-Amur
>
> The variable is listed in AAVSO VSX with a magnitude range 17.35-<20.0, see
> http://www.aavso.org/vsx/index.php?view=detail.top&oid=239569
>
> CRTS light curve shown at
>
> http://nesssi.cacr.caltech.edu/catalina/20100202/1002021180433134193p.htmlgives
> the maximum brightness (16.33m) on 2011 Feb. 04. Outburst peaks
> differ by quite a large amount. May be some of them are superoutbursts?
> According to the paper by T. Kato et al, 2012, this CV has a 34% chance of
> being SU UMa variable and 66% are in favor of SS Cyg type. 1-to-2 chances
> are still worth trying the time-resolved photometry.
>
> The variable is identical to SDSS J081936.09+191539.7, see
>
> http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237673807045853588(u=20.88
> g=20.36 r=19.94 i=19.75 z=19.91). Large (u-g) and (g-r) color
> indices at small (r-i) and (i-z) values may be due to the orbital
> variability rather than to large contribution from the secondary (SDSS
> obervations in 5 filters are *not* simultaneous).
>
> Denis Denisenko
>



-- 
Arto Oksanen
arto.oksanen at jklsirius.fi
Muurame, Finland

"In a world where I feel so small, I can't stop thinking big."


More information about the vsnet-alert mailing list