J/A+A/468/637 Light curve of HD 172189 (Costa+, 2007)
Pulsational frequencies of the eclipsing delta-Scuti star HD 172189.
Results of the STEPHI XIII campaign.
Costa J.E.S., Michel E., Pena J., Creevey O., Li Z.P., Chevreton M.,
Belmonte J.A., Alvarez M., Fox Machado L., Parrao L.,F. Perez Hernandez F.
Fernandez A., Fremy J.R., Pau S., Alonso R.
<Astron. Astrophys. 468, 637 (2007)>
=2007A&A...468..637C 2007A&A...468..637C
ADC_Keywords: Stars, variable ; Photometry
Keywords: stars: oscillations - stars: variables: delta Sct -
stars: binaries: eclipsing - stars: individual: HD 172189
Abstract:
The eclipsing delta-Scuti star HD 172189 is a probable member of the
open cluster IC 4756 and a promising candidate target for the CoRoT
mission.
The detection of pulsation modes is the first step in the
asteroseismological study of the star. Further, the calculation of the
orbital parameters of the binary system allows us to make a dynamical
determination of the mass of the star, which works as an important
constraint to test and calibrate the asteroseismological models.
We performed a detailed frequency analysis of 210 hours of photometric
data of HD 172189 obtained from the STEPHI XIII campaign.
We have identified six pulsation frequencies with a 99% confidence
level and a seventh with a 65% confidence level, in the range between
100-300uHz. In addition, three eclipses were observed during the
campaign, allowing us to improve the determination of the orbital
period of the system.
Description:
The reduced photometric data of HD 172189 are provided. The original
data were obtained from the XIII STEPHI campaign carried out between
7-28 June 2004 by three observatories: Observatorio del Teide (Izana,
Tenerife, Spain), Observatorio Astronomico Nacional de San Pedro
Martir (Baja California, Mexico) and Xinglong Station of the Beijing
Observatory (China). The data were reduced as described in our paper.
Each data file contains the whole light curve of one of the sites (see
Table 1, for a complete journal of the observations).
Objects:
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RA (2000) DE Designation(s)
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18 38 37.6 +05 27 55 HD 172189 = BD+05 3864
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 38 Log of the observations of the STEPHI XIII campaign
spm.dat 36 339030 San Pedro Matir light curve
zn.dat 36 283705 Xinglong Station light curve
xl.dat 34 44944 Izana/Tenerife light curve
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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- 8 A8 --- DataSet Data set name (1)
10- 19 A10 "DD/MM/YYYY" Date Observatiopn date
21- 33 F13.5 d HJDb Begin of observation HDJ date
35- 47 F13.5 d HJDe End of observation HJD date
49- 53 I5 --- Npoints Number of points
55- 58 F4.2 h Dur Duration
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Note (1): The letters XL, ZN and SP in the data set names indicate
the site of observation.
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Byte-by-byte Description of file: spm.dat zn.dat xl.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d HJD Heliocentric Julian Date
23- 36 E14.8 mag MAmp Modulation in amplitude
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Acknowledgements:
Jose Eduardo Costa, 00112740(at)ufrgs.br
(End) J.E.S. Costa [Obs. Paris/IF-UFRGS], Patricia Vannier [CDS] 26-Mar-2007