J/A+A/534/A111 CT Her differential BV photometry and RV (Lampens+, 2011)
Multi-site, multi-year monitoring of the oscillating Algol-type eclipsing binary
CT Her.
Lampens P., Strigachev A., Kim S.-L., Rodriguez E., Lopez-Gonzalez M.J.,
Vidal-Sainz J., Mkrtichian D., Koo J.-R., Kang Y.B., Van Cauteren P.,
Wils P., Kraicheva Z., Dimitrov D., Southworth J., Garcia Melendo E.,
Gomez Forellad J.M.
<Astron. Astrophys. 534, A111 (2011)>
=2011A&A...534A.111L 2011A&A...534A.111L
ADC_Keywords: Binaries, eclipsing - Photometry, CCD
Keywords: binaries: eclipsing - stars: oscillations -
stars: fundamental parameters - stars: individual: CT Her
Abstract:
We present the results of a multi-site photometric campaign carried
out in 2004-2008 for the Algol-type eclipsing binary system CT Her,
the primary component of which shows delta Scuti-type oscillations.
Our data consist of differential light curves collected in the filters
B and V which have been analysed using the method of Wilson-Devinney
(Phoebe). After identification of an adequate binary model and removal
of the best-matching light curve solution, we performed a Fourier
analysis of the residual B and V light curves to investigate the
pulsational behaviour.
Description:
Tables of differential magnitudes in the sense (CT Her - C1), used to
define the B and V light curves, are given in both filters. The radial
velocities were measured with the cross-correlation technique using
synthetic spectra obtained with the programme SPECTRUM, and a grid of
LTE-atmosphere models of solar-type chemical composition. Also
tabulated are the cycle numbers and the O-C values corresponding to
the linear resp. the parabolic model which best represent the
evolution of the orbital period of this binary system.
Objects:
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RA (2000) DE Designation(s)
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16 20 26.57 +18 27 16.9 CT Her = V* CT He
16 20 33.89 +18 27 18.5 C1 = GSC01509-1140
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 13 Campaigns and instrumentation
table3.dat 34 7960 Differential magnitudes (CT Her - C1) in B filter
(166h of observations)
table4.dat 34 2180 Differential magnitudes (CT Her - C1) in V filter
(86h of observations)
table9.dat 26 25 Radial velocities of CT Her (component A)
table12.dat 45 173 O-C values for two models representing the
evolution of Porb
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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- 4 I4 yr Year Year of observation
6- 18 A13 --- Site Site of observation
20- 27 A8 --- Country Country of observation
29- 34 A6 --- Tel Telescope used
36- 50 A15 --- Obs Period of observation (& Obs)
52- 53 I2 --- Nights Number of nights fo observation
55- 58 I4 --- Nused Number of useful observation
60- 61 I2 h Nhours Number of hours of observations
63 A1 --- Filt [BV] Filter used
65- 68 A4 --- Code Observatory code
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 --- HJD Heliocentric Julian date
16- 24 F9.6 mag dmag B (table3) or V (table4) differential magnitude
(CT Her - C1) (1)
26- 29 A4 --- Code Observatory code (in table1.dat file)
31- 34 I4 --- Year Year of observation
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Note (1): Comparison star C1 = GSC 01509-1140 (V=10.951, B=12.365)
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 --- HJD Heliocentric Julian date
15- 20 F6.2 km/s RV Radial velocity measured with the
cross-correlation technique
23- 26 F4.2 km/s e_RV Uncertainty of the radial velocity
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 --- HJD Heliocentric Julian date
15- 19 I5 --- E Cycle number
22- 28 F7.4 --- O-C1 Residual value for the linear model
31- 37 F7.4 --- O-C2 Residual value for the parabolic model
40 A1 --- p/s Primary/secondary minimum
43- 45 A3 --- Tech Observational method following 'O-C Gateway' (1)
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Note (1): 'O-C Gateway' (2009), cf. http://var.astro.cz/ocgate/ocgate.php
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Acknowledgements:
Patricia Lampens, patricia.lampens(at)oma.be
(End) Patricia Lampens [ROB, Belgium], Patricia Vannier [CDS] 11-Aug-2011