[vsnet-ecl 3750] [vsnet-chat 7513] Two New Eclipsing Variable Stars in the Field ofRXJ2133: VSX J213321.5+510857 and VSX J213320.0+510819

[K.Nagai]

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> Date: Sun, 27 Dec 2009 17:13:20 +0200
> Subject: [vsnet-chat 7513] Two New Eclipsing Variable Stars in the Field
ofRXJ2133: VSX J213321.5+510857 and VSX J213320.0+510819
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> TWO NEW ECLIPSING VARIABLE STARS IN THE FIELD OF RX J2133:  VSX
J213321.5+510857 AND VSX J213320.0+510819
> 
> NATALIA A. VIRNINA 1,2, IVAN L. ANDRONOV 2, PAVOL A. DUBOVSKY 3, IGOR KUDZEJ 3
> 
> 1)	Odessa National University, Odessa, Ukraine, virnina at gmail.com 
> 2)	Odessa National Maritime University, Odessa, Ukraine, il-a at mail.ru  
> 3)	Vihorlat Observatory, Humenn&#233;, Slovakia, var at kozmos.sk,
vihorlatobs1 at stonline.sk 
> 
> 
> Abstract:   Two new eclipsing variable stars USNO-B1.0 1411-0397871 and
USNO-B1.0 1411-0397855 were discovered in the 9.4'x9.4' field of 1RXS
J213344.1+510725 = RX J2133 which had been observed using the 1-meter
Vihorlat National Telescope in the Astronomical Observatory on Kolonica
Saddle and got names "Kol 7" and "Kol 8" for the new variables discovered in
Kolonica. 
> We preliminary registered these stars in the VSX (http://vsx.aavso.org/)
and they got names VSX J213321.5+510857 and VSX J213320.0+510819, respectively.
>  Types of variability were determined as EW for both stars. For the
statistical modeling, the program FDCN (Andronov, 1994,
http://il-a.pochta.ru/OAP7_49.pdf ) was used, which allowed to determine
degrees of the statistically optimal trigonometric polynomials and all
photometric parameters, which are needed for the General Catalogue of
Variable Stars, with their corresponding errors.
> 
> The Tab presents all the parameters needed for the GCVS for these two
newly discovered variables.
> 
> Parameters	Kol7	Kol8
> Initial epoch (HJD)	2455084.1995ア0.0005	2455083.7550ア0.0023
> Period (d)	0.371782ア0.000006	0.91503ア0.00015
> m min I (R)	15.935ア0.005	17.268ア0.012
> m min II (R)	15.887ア0.003	17.210ア0.006
> m max (R)	15.633ア0.003	16.784ア0.007
> S                     4                              4
> 
> Another possible solution for Kol8 is T0=2455083.5781ア0.0013,
P=0.92529ア0.00004. In this case, the phase light curve is not covered
completely, only one minimum is visible. 
> 
> Acknowledgements:
> The authors are thankful to Dr. Zden&#283;k Mikul&#225;&#353;ek for
helpful discussion.  
> 
> The complete paper was submitted to the "Open European Journal on Variable
Stars" 
> http://var.astro.cz/oejv/ 
>