J/A+A/450/715 Differential uvby photometry of HD 218427 (Rodriguez+, 2006)
The frequency ratio method and the new multiperiodic Gamma Dor star HD 218427.
Rodriguez E., Amado P.J., Suarez J.C., Moya A., Dupret M.A., Poretti E.,
Grigahcene A., Costa V., Lopez-Gonzalez M.J.
<Astron. Astrophys. 450, 715 (2006)>
=2006A&A...450..715R 2006A&A...450..715R
ADC_Keywords: Stars, variable ; Photometry, uvby
Keywords: stars: variables: general - stars: individual: HD 218427 -
stars: oscillations - techniques: photometric
Description:
Table 1 contents 845 simultaneous measurements collected in each of
the four uvby colours of the Stromgren photometric system for the
Gamma Doradus variable HD 218427. The data are magnitude differences
(Du, Dv, Db, Dy, D(b-y), Dm1, Dc1) of the variable star minus
comparison star in the standard system versus Heliocentric Julian
Date. The comparison star is HD 219874. The origin in time is the
Julian Day 2452839.
The observations were carried out by the authors through the year 2003
using the 0.90m telescope at Sierra Nevada Observatory, Spain (Julian
Days:0 to 69 in the table) and the 1.50m telescope at San Pedro Martir
Observatory, Mexico (Julian Days: 122 to 128). Both telescopes are
equipped with identical six-channel uvby-Hbeta spectrograph
photometers for simultaneous measurements in uvby or in the narrow and
wide Hβ channels, respectively. Please note that a technical
problem arose with the "u" filter in the 1.50m telescope, which made
the "u" data collected with that telescope useless and they are named
as 99.
Objects:
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RA (2000) DE Designation(s)
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23 07 29.0 +49 02 37 HD 218427 = BD+48 3943
23 18 52.9 +47 22 18 HD 219874 = HIP 115108
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 845 Differential Stroemgren photometry of HD 218427
(HD 218427 - HD 219874)
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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- 10 F10.4 d HJD-2452839 Heliocentric Julian date, HJD-2452839
14- 20 F7.4 mag Dumag ?=99. Differential Stromgren u magnitude
24- 30 F7.4 mag Dvmag Differential Stromgren v magnitude
34- 40 F7.4 mag Dbmag Differential Stromgren b magnitude
44- 50 F7.4 mag Dymag Differential Stromgren y magnitude
54- 60 F7.4 mag Db-y Differential b-y colour index
64- 70 F7.4 mag Dm1 Differential m1 index
74- 80 F7.4 mag Dc1 ?=99. Differential c1 index
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Acknowledgements: Eloy Rodriguez, eloy(at)iaa.es
(End) Patricia Vannier [CDS] 02-Feb-2006