[vsnet-alert 11987] OT_J213806.6+261957 spectrum [Re: Bright opticaltransient in Pegasus]

[Kenzo Kinugasa]

Dear All,

   We took the low dispersion spectrum of OTJ213806.6+261957 on May 8.65
with the GAO 1.5-m reflector (+GLOWS). Following the report by Arai,
the spectrum shows a strong H-alpha emission as well as H-beta and HeII
(468.6nm). Also, the Bowen complex of NIII, CIII and CIV exists. These
features resemble those of GW lib at early phase. The spectrum is 
http://www.astron.pref.gunma.jp/~kinugasa/otj2138_100508.gif. The 
normalized one by continum (roughly) is 
http://www.astron.pref.gunma.jp/~kinugasa/otj2138_100508_nor.gif.

Regards,
K.Kinugasa 
Gunma Astronomical Observatory


arai6a at cc.kyoto-su.ac.jp wrote.

>> >From our data of the transient in Pegasus reported in CBET 2275,
>> I was not able to identify other lines due to low S/N data.
>> 
>> However, M. L. Graham et al (CBET 2275) reported that
>> the object shows emission lines in H-alpha, H-beta and He II.
>> Furthermore, they pointed out the existence of high excited lines
>> (N III, C III and C IV).
>> 
>> Their results indicates that the object would not be a typical dwarf nova
>> but rather an exploding object.
>> 
>> Regards,
>> Akira Arai (Kyoto Sangyo University)
>> 
>>