[vsnet-alert 12061] Re: Wils_SDSSJ162520.29+120308.7 variation, type?

[Gianluca Masi]

Dear Colleagues,

I can now estimate a Psh= 2.14 hours, while the amplitude of the 
modulation is about 0.15 mag.

Regards,
Gianluca

Gianluca Masi ha scritto:
> Dear Colleagues,
> 
> I'm still doing time resolved photometry on this source, which I found 
> basically as bright as at the end of my previous run (yesterday).
> 
> I see the star is showing some large modulation (0.1/0.2 mag or more), 
> possible resembling regular superhumps. If confirmed, this would suggest 
> this is a SU UMa CV. Period of the modulaton is 1.5 hours (by eye!)
> 
> More once the run will be finished.
> 
> Regards,
> Gianluca
> 
> 
> 
> Taichi Kato ha scritto:
>> Wils_SDSSJ162520.29+120308.7 variation, type?
>>
>>    Just received data from Gianluca Masi.  Indeed interesting 
>> modulations!
>> The object was rather rapidly fading at a rate of 0.38 mag/d.
>> Superimposed (relatively regular) modulations have a period of 
>> 0.047(8) d,
>> as Masi has pointed out.  Although this periodicity needs to be verified,
>> if this period reflects the orbital or superhump period, the object 
>> may be
>> analogous to V485 Cen and EI Psc (then consistent with the underlying
>> M-type spectrum).  It even seems to me that underlying white dwarf was
>> visible around Hbeta and Hgamma on the SDSS spectrum.
>> Further detailed observations are encouraged!