> Observations on Jan 20 showed a transition to the early modulation with
> 'growing' superhumps of still small amplitude and a hint of a 0.0095d alt.
> 0.019d period around a mean magnitude of 12.49CR.
Ordinary superhumps, yes. The amplitudes were too small
to be directly visible in Hambsch's data.
TCP J07094936+1412280: appearance of ordinary superhumps
Kiyota-san, Itoh-san, Tonny Vanmunster, Stephen M. Brincat, Sano-san,
and Kyoto Univ. Obs. have reported further observations of TCP
The data on 15th Jan at Kyoto Univ. Obs. showed clear ordinary superhumps
with an amplitude of ~0.15 mag.
The baseline was still too short to determine its period.
Continuous observations are encouraged.
ASASSN-22ax: new SU UMa-type dwarf nova
Stephen Brincat, Itoh-san and Kiyota-san have
reported observations. Since Jan. 26, this object
has shown superhumpss with a period of 0.06114(7) d
and an amplitude of 0.22 mag. Superhumps were not
apparent up to Jan. 24.
I have been collecting unfiltered CCD observations of ASASSN-22as over the
past 11 nights at CBA Extremadura Observatory, using a 0.40-m f/5.1
telescope and SX-46 CCD camera under mostly clear skies.
The collected light curves did not show obvious periodic modulations, with
the exception of last night Jan 27/28, 2022. Regular superhumps with an
amplitude of 0.24 mag are finally visible, establishing ASASSN-22as 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 0.0651 +/- 0.0007d. The object was at mag CV = 16.4 on
I will send my observations to AAVSO, CBA and VSNET for further analysis.
CBA Belgium Observatory
CBA Extremadura Observatory
PERANSO : The Light Curve and Period Analysis Software
ASASSN-22as: new SU UMa (or even WZ Sge?) star in the period gap
Tonny Vanmunster and Tamas Tordai have reported
observations. I could find a period of 0.09974(9) d
(full amplitude of 0.10 mag). The profile resembles
that of early superhumps (doubly peaked, sharp minimum)
rather than ordinary superhumps. It is also possible
that these superhumps are stage A superhumps.
If this is indeed a WZ Sge star, it is very unusual.
Further observations are needed to follow the development
of these superhumps.