Dear colleagues,
TCP J04361641+562824 (aka AT 2023ayf) has been very recently detected by the XOSS team (see TNS Astronomical Transient Report No. 170114). I have just finished analysing my unfiltered CCD observations of TCP J04361641+5628241, obtained on 2023, Jan 28/29 at CBA Extremadura Observatory (Spain) using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies.
The resulting light curve clearly shows the presence of a superhump with an amplitude of 0.39 mag, establishing TCP J04361641+5628241 as a new SU UMa-type dwarf nova. An accurate period analysis was not yet possible, due to the lack of multiple superhumps within the observation window, but it clearly is an object with a long superhump period. A rough estimate puts it at 0.095d, but further observations are needed to firmly establish the superhump period. The object was at mag CV = 14.7 on Jan 28th.
I will send my observations to AAVSO, CBA and VSNET for further analysis.
Best regards
Tonny
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Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
PERANSO: The Light Curve and Period Analysis Software