J/A+A/374/164 BH Cas VRI differential magnitudes (Zola+, 2001)
A Photometric study of BH Cas
Zola S., Niarchos P., Manimanis V., Dapergolas A.
<Astron. Astrophys. 374, 164 (2001)>
=2001A&A...374..164Z 2001A&A...374..164Z
ADC_Keywords: Binaries, eclipsing ; Photometry, VRI
Keywords: binaries: eclipsing: BH Cas
Abstract:
New CCD observations of the contact binary system BH Cas are presented
in this paper. New times of minima and an ephemeris based on our
observations are also given. Complete light curves obtained in the V,
R and I filters have been analyzed with the Wilson-Devinney code to
derive the geometrical and physical parameters of the system. The
final solution leads to a contact configuration (f≃21-22%). We have
found that the photometric mass ratio differs from the spectroscopic
one by about 13%, a discrepancy which is not uncommon for other W UMa
systems. The absolute elements of the system are used to study its
evolutionary status. The results show that BH Cas is a fairly evolved
W-type W UMa system.
Objects:
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RA (2000) DE Designation(s)
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00 21 21.0 +59 09 06 BH Cas
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data.dat 66 212 Individual observations of BH Cas in VRI
filters (instrumental)
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Byte-by-byte Description of file: data.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Consecutive number
4- 18 F15.5 d HJDV ? Julian Date (V filter)
19- 24 F6.3 mag DVmag ? Comparison - variable magnitude difference in V
25- 39 F15.5 d HJDR Julian Date (R filter)
40- 45 F6.3 mag DRmag Comparison - variable magnitude difference in R
46- 60 F15.5 d HJDI ? Julian Date (I filter)
61- 66 F6.3 mag DImag ? Comparison - variable magnitude difference in I
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Acknowledgements: Staszek Zola
(End) Patricia Bauer CDS 15-Jun-2001