[vsnet-outburst 22489] ASASSN-18ru: new SU UMa type dwarf nova - refined superhump period

[Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-outburst]

Dear colleagues,


Further to the below message, I have now also analysed my 2018, Aug 14/15 unfiltered CCD photometry data of ASASSN-18ru. Observations were made at CBA Extremadura Observatory (Spain),  using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under a very clear sky. 

 

The combined (detrended) light curve of both nights still clearly shows the presence of superhumps with an amplitude of 0.22 mag. A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a refined superhump period of 0.0601 +/- 0.0003d. The object was at mag 15.4 (CV) on Aug 14th. 

 

Observations will be sent to AAVSO, CBA and VSNET for further analysis.

 

Best regards
Tonny


 

Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
 <http://www.cbabelgium.com> www.cbabelgium.com

www.peranso.com <http://www.peranso.com> 

 

 

 

From: Tonny Vanmunster [mailto:tonny.vanmunster at gmail.com] 
Sent: dinsdag 14 augustus 2018 10:21
To: 'cba-chat at cbastro.org'; 'Tonny Vanmunster'; 'Taichi Kato'; 'VSNET''; 'vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp'; 'vsnet-newvar at yahoogroups.com'; 'vsnet-outburst'; 'vsnet-outburst at yahoogroups.com'
Subject: ASASSN-18ru: new SU UMa type dwarf nova

 

Dear colleagues,

I have just concluded the analysis of my 2018, Aug 13/14 unfiltered CCD photometry session of ASASSN-18ru. Observations were made at CBA Extremadura Observatory (Spain),  using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under a very clear sky. 

 

The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.22 mag. A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined superhump period of 0.0613 +/- 0.0014d. The object was at mag 15.1 (CV) on Aug 13th. 

 

Astrometry: 17h 49m 30.94s, +02° 49’ 36.2” (with 0.3” residual).


Observations will be sent to AAVSO, CBA and VSNET for further analysis.

 

Best regards
Tonny


 

Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
 <http://www.cbabelgium.com> www.cbabelgium.com

www.peranso.com <http://www.peranso.com> 

 

 

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