Dear all, I have also observed this target the past couple of nights from Belgium with a C14 Edge HD at f/7. Photometry has been submitted to the AAVSO database. I can confirm Tonny's results, but have not calculated the superhump period. Best regards, Josch Hambsch On 07.03.2025 18:06, tonny.vanmunster@gmail.com wrote:

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of TCP J14034008+7947313, obtained over the past 7 nights between 2025, Feb 28 and Mar 06 at CBA Belgium Observatory using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera under clear skies. No superhumps were visible in the light curves of this object till 2025, Mar 6/7.

The light curve of 2025, Mar 6/7 clearly shows the presence of regular superhumps with an amplitude of 0.18 mag, establishing TCP J14034008+7947313 as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0) yields a combined superhump period of 0.0586 +/- 0.0003d. The object was at mag CV = 15.3 on Mar 06th.

Image calibration and photometry were done using Phoranso, which allows to simultaneously measure other variables present in the FOV of a variable star.

I will send my observations to AAVSO, CBA and VSNET for further analysis.

With kind regards,

Tonny

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Tonny Vanmunster

CBA Belgium Observatory

CBA Extremadura Observatory

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

PERANSO : The Light Curve and Period Analysis Software

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

PHORANSO: Photometric Reduction and Analysis Software

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