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April 2024

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[vsnet-campaign-dn 17483] ASASSN-24cg (aka Gaia DR3 4378710224740797312): new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 04 Apr '24

04 Apr '24

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-24cg (aka Gaia DR3 4378710224740797312 and TCP J16454549-0257144) obtained on 2024, Apr 03/04 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 superhumps with an amplitude of 0.34 mag, establishing ASASSN-24cg as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Lomb-Scargle GLS and PDM methods (Peranso 3.0) yields a combined superhump period of 0.0613 +/- 0.0007d. The object was at mag CV = 13.5 on Apr 4th. Image calibration and photometry were done using a beta version of Phoranso. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny With kind regards, Tonny --- 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 *** NEW - COMING SOON *** http://www.phoranso.com <http://www.phoranso.com/>

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