J/A+A/417/745 V(RI)C differential photometry of V861 Her (Csizmadia+, 2004)
Photometric study of the contact binary star V861 Herculis.
Csizmadia Sz., Patkos L., Moor A., Konyves V.
<Astron. Astrophys. 417, 745 (2004)>
=2004A&A...417..745C 2004A&A...417..745C
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI ; Photometry, Cousins
Keywords: techniques: photometric - stars: individual: V861 Her
Abstract:
First Cousins V(RI)C light curves of the W UMa-type eclipsing variable
star V861 Herculis are presented. The system was observed in 2000 and
2003. The light curves obtained at different epochs showed significant
deviation from each other. The O'Connell effect (usually explained by
spots on the surface which are responsible for variations in the
intensity of the system) was about ΔV=0.05mag in 2000 but it
vanished in 2003 (except the night of February 22/23, 2003 when we
observed a small O'Connell effect (ΔV=0.020)). Further
peculiarities of the light curves are also discussed.
Description:
V861 Herculis was observed at the Konkoly Observatory in 2000 and in
2003 to obtain a precise multicolour light curve. The observations
were carried out with the 1m RCC telescope of the Konkoly Observatory
located at the Piszkesteto Mountain Station at 964m above the sea
level.
Objects:
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RA (2000) DE Designation(s)
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16 51 12.9 +41 17 58 V861 Her = GSC 03079-00201
16 51 20.7 +41 16 57 GSC 3079-194
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
imag.dat 20 475 V861 Her Cousins I band differential magnitude
rmag.dat 20 473 V861 Her Cousins R band differential magnitude
vmag.dat 20 471 V861 Her V band differential magnitude
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Byte-by-byte Description of file: imag.dat rmag.dat vmag.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian date
16- 20 F5.3 mag Dmag Differential photometry relative to the
comparison star GSC 3079-194
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Acknowledgements: Szilard Csizmadia
(End) Patricia Bauer [CDS] 26-Feb-2004