[vsnet-outburst 25938] 1RXS J012750.5+380830: what kind of variable is this?

[Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-outburst]

Dear colleagues,

 

I obtained unfiltered CCD observations of 1RXS J012750.5+380830 on 2020, Oct 26/27 and Oct 27/28 at CBA Extremadura Observatory, using a 0.40-m f/5.1 telescope and SX-46 CCD camera.

 

Below are the corresponding two light curves. On Oct 26/27th, the object was at average mag. CV 14.4, showing a 0.4 mag 'hump like' structure near JD 2459149.47, which - looking at the partial real-time light curve of that night - I misinterpreted as a superhump (Taichi Kato corrected this in vsnet-outburst 25934). The full light curve clearly shows this is not a superhump signature. One night later, the object showed variations with an amplitude of up to 1.0 mag (!) interleaved with smaller-amplitude variations, while it faded to average mag CV 15.4.

 

This is an ackward variable. Anybody who has a clue on what type of variable we are observing here?

 

Best regards

Tonny

 

--

Tonny Vanmunster

CBA Belgium Observatory

CBA Extremadura Observatory

 <http://www.cbabelgium.com> www.cbabelgium.com

 <http://www.peranso.com> www.peranso.com

 



 



 

 

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