Dear colleagues,
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 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 http://www.cbabelgium.com
PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com