J/AJ/142/12 WZ Cyg BVRI light curves (Lee+, 2011)
WZ Cygni: a marginal contact binary in a triple system?
Lee J.W., Kim S.-L., Lee C.-U., Kim H.-I., Park J.-H., Hinse T.C.
<Astron. J., 142, 12 (2011)>
=2011AJ....142...12L 2011AJ....142...12L
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binaries: close - binaries: eclipsing - stars: individual (WZ Cygni)
Abstract:
We present new multiband CCD photometry for WZ Cyg made on 22 nights
in two observing seasons of 2007 and 2008. Our light-curve synthesis
indicates that the system is in poor thermal contact with a fill-out
factor of 4.8% and a temperature difference of 1447K. Including our
40 timing measurements, a total of 371 times of minimum light spanning
more than 112yr were used for a period study. Detailed analysis of
the O-C diagram showed that the orbital period has varied by a
combination of an upward parabola and a sinusoid.
Description:
New photometry of WZ Cyg was performed on 22 nights from 2007 October
26 through 2008 October 20 in order to obtain multicolor light curves
and to look for possible flare-like phenomena. The observations were
taken with a SITe 2K CCD camera and a BVRI filter set attached to the
61cm reflector at Sobaeksan Optical Astronomy Observatory (SOAO) in
Korea.
Objects:
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RA (2000) DE Designation(s)
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20 53 06.86 +38 49 40.0 WZ Cyg = BD+38 4262
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 812 CCD photometric observations of WZ Cyg
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD-B Heliocentric Julian Date of B band observation
15- 20 F6.3 mag Bmag Differential B band magnitude
22- 34 F13.5 d HJD-V ? Heliocentric Julian Date of V band observation
36- 41 F6.3 mag Vmag ? Differential V band magnitude
43- 55 F13.5 d HJD-R ? Heliocentric Julian Date of R band observation
57- 62 F6.3 mag Rmag ? Differential R band magnitude
64- 76 F13.5 d HJD-I ? Heliocentric Julian Date of I band observation
78- 83 F6.3 mag Imag ? Differential I band magnitude
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 21-Sep-2012