[vsnet-campaign-dn 14242] ASASSN-19abi: new WZ Sge-type dwarf nova
Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-campaign-dn
vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp
Sun Nov 17 08:41:32 JST 2019
Dear colleagues,
I have just concluded the analysis of my 2019, Nov 16/17 unfiltered CCD photometry session of ASASSN-19abi. Observations were made at CBA Extremadura Observatory, 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 early superhumps with a very large amplitude of 0.71 mag, hence establishing ASASSN-19abi as a new WZ Sge-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined superhump period of 0.0567 +/- 0.0014d. The object was at mag 14.7 (CV) on Nov 16th.
Astrometry (J2000.0):
RA = 22h08m57.51s
Dec = -09°04’50.7”
Residuals: 0.2”
Observations will be sent to AAVSO, CBA and VSNET for further analysis.
Follow-up observations are evidently highly recommended.
Best regards
Tonny
--
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com <http://www.cbabelgium.com>
www.peranso.com <http://www.peranso.com>
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