[Aavso-photometry] 1RXS J053234.9+624755 is a new very short-period UGSU-type dwarf nova

[Geir Klingenberg]

I can confirm the observations og Tonny Vanmunster. Between 19:00 UT
on March 17 and 04:40 on March 18 I observed superhumps with a period
of 0.055d and amplitude of approx. 0.1 mag.

Tonight, between 19:00 UT on March 18 and 04:30 on March 19 I observed
superhumps with a period of 0.057d and an amplitude of about 0.2 mag.
The amplitude seems to be increasing and the star might be
re-brightening.

I will post my observations to AAVSO soon. You can see preliminary
light curves here:

http://asp.jm-data.no/geke15obs/

Geir Klingenberg


On Sat, 19 Mar 2005 01:18:53 +0100, Tonny Vanmunster
<Tonny.Vanmunster at cbabelgium.com> wrote:
> Dear CV colleagues,
> 
> I have pleasure to announce the detection of superhumps in 1RXS
> J053234.9+624755, a recently discovered CV that has been reported in
> outburst by W. Kriebel (cvnet-outburst, 2005 Mar 16) and P. Schmeer
> (cvnet-outburst, 2005 Mar 16) on Mar 16.8 UT, 2005.
> 
> This cataclysmic variable is located at R.A.=05h32m33.87s and
> Decl.=+62o47'52.1" (J2000.0). I started a time-series photometry session on
> this target at CBA Belgium Observatory on 2005, Mar 18.797 UT, using a
> 0.35-m f/6.3 telescope and unfiltered ST-7 CCD. The observing session is
> currently still ongoing (> 4.6 hours), and the intermediate light curve
> clearly shows superhumps with an amplitude of approx. 0.2 mag, superimposed
> on a fading trend. A first superhump period analysis, using the ANOVA method
> of Peranso, yields a value of 0.055 /+- 0.001 d, classifying this object as
> a new very short-period UGSU-type dwarf nova.
> 
> I will make the full data analysis available on my web-site
> www.cbabelgium.com (and to AAVSO, CBA) later tomorrow, once all observations
> have been finally reduced.
> 
> Follow-up time-resolved photometry is further encouraged, and I'd be pleased
> to hear about other successful observations ...
> 
> Best regards,
> Tonny Vanmunster
> 
> Tonny Vanmunster
> CBA Belgium Observatory
> http://www.cbabelgium.com
> ________________________________________________________
> PERANSO : The Final Frontier of Period Analysis Software
> http://www.peranso.com
> ________________________________________________________
> 
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