[vsnet-alert 11977] OT_J213806.6+261957 [was: Bright optical transient in Pegasus]

[Gianluca Masi]

Dear Colleagues,

I just finished analyzing my data for this source, after about 2.6 hours 
of coverage.

I see a clear modulation of 0.05 magnitudes, superimposed on a fading 
trend of about 0.15 magnitudes.

I performed an ANOVA period analysis, finding a possible candidate for 
the recorded modulation of 1.19 hours.

The plot is visible here: 
http://virtualtelescope.bellatrixobservatory.org/OT_J213806.6p61957_9may2010.jpg

Data have been sent to Kyoto for further analysis.

Regards,
Gianluca

Gianluca Masi ha scritto:
> Hi All,
> 
> I started time resolved, V-photometry at the Virtual Telescope robotic 
> facility and the star is clearly humping. Going as long as possible.
> 
> all the best,
> Gianluca
> 
> Akira Arai ha scritto:
>>> 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)
>>
>>
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> 
> 
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