J/A+A/464/263 UBV photometry of HD 143418 (Bozic+, 2007)
HD 143418: An unusual light variable and a double-lined spectroscopic binary
with a CP primary.
Bozic H., Wolf M., Harmanec P., Prsa A., Percy J.R., Ruzdjak D., Sudar D.,
Slechta M., Ak H., Eenens P.
<Astron. Astrophys. 464, 263 (2007)>
=2007A&A...464..263B 2007A&A...464..263B
ADC_Keywords: Binaries, spectroscopic ; Photometry, UBV
Keywords: binaries: spectroscopic - stars: individual: HD 143418 -
stars: chemically peculiar
Abstract:
After a serendipitious discovery that HD 143418 is a light variable,
we analyzed numerous UBV observations and Hipparcos Hp magnitudes
transformed to Johnson V to find out whether the object is a very
unusual spectroscopic binary.
Initial reductions of new photometry were carried out with the HEC22
program, while the new spectra were reduced in the IRAF and SPEFO
programs. Orbital elements were derived with the FOTEL program, the
KOREL disentangling was applied, and period searches were carried out
using phase dispersion minimalization technique and the program
PERIOD04. Final modeling of radial-velocity and light variations was
carried out in PHOEBE.
Objects:
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RA (2000) DE Designation(s)
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15 58 25.7 +43 12 49 HD 143418 = HIP 78226
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 70 578 UBV photometric data of HD 143418
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 17 F4.2 -- w Weight of the data point
19- 24 F6.3 mag Vmag ?=99.999 Johnson V magnitude (1)
26- 31 F6.3 mag Bmag ?=99.999 Johnson B magnitude (1)
33- 38 F6.3 mag Umag ?=99.999 Johnson U magnitude (1)
40- 45 F6.3 mag B-V ?=99.999 Johnson B-V colour index (1)
47- 52 F6.3 mag U-B ?=99.999 Johnson U-B colour index (1)
55- 59 F5.3 -- X Air mass of the observation
61- 65 F5.3 -- dX Air mass difference between var. and comp.
69- 70 I2 --- Station Numerical code identifying sources of data
in the Ondrejov/Praha data archives (2)
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Note (1): 99.999 denotes a missing measurement
Note (2): Numerical code as follows:
1 = Hvar, Croatia, 0.65-m reflector
4 = Ondrejov, Czech Republic, 0.65-m reflector
15 = Phoenix, Arizona, 0.25-m Automatic Photometric Telescope
30 = San Pedro Martir, Mexico, 0.84-m reflector
60 = ESA Hipparcos satellite, Hp converted to Johnson V
66 = Tubitak, Turkey, 0.40-m reflector
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Acknowledgements:
Petr Harmanec, hec(at)sirrah.troja.mff.cuni.cz
(End) Patricia Vannier [CDS] 30-Nov-2006