[vsnet-alert 19217] Re: (cba:chat) ASASSN-15sc: new SU UMa-type dwarf nova

[Tonny Vanmunster]

Dear colleagues,

 

A further analysis of my below observations, covering this time a time span of 8.2 hours, has resulted in following updated superhump period, using the ANOVA, Lomb-Scargle and PDM methods (Peranso): 0.0584 +/- 0.0002d.



Note also that the object did not show superhumps during my observations of Oct 26th.

 

Best regards

Tonny

 

From: cba-chat-bounces at cbastro.org <mailto:cba-chat-bounces at cbastro.org>  [mailto:cba-chat-bounces at cbastro.org] On Behalf Of Tonny Vanmunster
Sent: zondag 1 november 2015 0:54
To: cba-chat at cbastro.org <mailto:cba-chat at cbastro.org> ; vsnet-alert at yahoogroups.com <mailto:vsnet-alert at yahoogroups.com> ; 'ALERT, VSNET'; vsnet-outburst at yahoogroups.com <mailto:vsnet-outburst at yahoogroups.com> ; vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp <mailto:vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp> ; 'Taichi Kato'
Subject: (cba:chat) ASASSN-15sc: new SU UMa-type dwarf nova

 

Dear colleagues,
 
I’m currently (2015, Oct 31) doing unfiltered CCD photometry of ASASSN-15sc. An intermediate analysis of the observations, made at CBA Belgium Observatory using a 0.35-m f/6.3 telescope and STT-3200ME CCD camera under clear skies, clearly reveals the presence of superhumps, establishing this target as a new SU UMa-type dwarf nova. The superhump amplitude is approx 0.2 mag. A preliminary period analysis using the ANOVA method (Peranso), yields a period of 0.0584 +/- 0.0006d. 

A more refined period analysis will be made upon completing the current observing session.

 

Further observations are encouraged.

Observations will be sent to CBA and VSNET for analysis.

Best regards
Tonny 

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