[vsnet-alert 13347] Re: [vsnet-campaign-dn 7834] OT J210950.5+134840 = Itagaki transient

[Akira Arai]

We performed optical low-dispersion spectroscopy
(range 400-750nm; R~600 at H-alpha) of a new variable
star OT J210950.5+134840(*) on May 25.67UT using
1.3m Araki-telescope with LOSA/F2 at Koyama Astronomical Observatory.

Our spectum shows blue continuum with a H_beta and H_gamma absorption
with no significant blue-shifts. No obvious line is visible at
H_alpha. This suggests
that an emission component of H_alpha could be filling in the absorption line.
Our result suggests that the object would be a dwarf nova in outburst.

Our spectrum is shown in the following page :
http://www.cc.kyoto-su.ac.jp/~kao/blog/index.php/view/94


Regards,
A. Arai,
Koyama Astronomical Observatory,
Kyoto Sangyo Univ., Japan.

-- 
-------------------------------------------------
Akira Arai (PD)
Koyama Astronomical Observatory,
Kyoto Sangyo University
mail : arai6a at cc.kyoto-su.ac.jp
-------------------------------------------------

2011/5/25 Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>:
> OT J210950.5+134840 = Itagaki transient
>
>   Itagaki-san has detected a likely dwarf nova in outburst.
> The object was at 11.5C mag on May 24.6991 UT.
> The amplitude of the outburst is larger than 7 mag, and it is likely
> a WZ Sge-type outburst.  Time-resolved photometry and spectroscopy
> are encouraged!
>
> http://www.cbat.eps.harvard.edu/unconf/followups/J21095047+1348396.html
>



-- 
-------------------------------------------------
Akira Arai (PD)
Koyama Astronomical Observatory,
Kyoto Sangyo University
mail : arai6a at cc.kyoto-su.ac.jp
-------------------------------------------------