J/A+A/343/446 VRI Cousins photometry of Am stars (Domingo+ 1999)
Late A-type stars: new Stroemgren photometric calibrations of absolute
magnitudes from Hipparcos
Domingo A, Figueras F.
<Astron. Astrophys. 343, 446 (1999)>
=1999A&A...343..446D 1999A&A...343..446D
ADC_Keywords: Photometry, UBVRI ; Stars, early-type
Keywords: stars: chemically peculiar - stars: distances - stars: early-type -
stars: fundamental parameters -
stars: Hertzsprung-Russel (HR) and C-M diagrams
Description:
Tablea1 contains photoelectric VRI Cousins photometry for 63 Am stars
observed on the 17th June, 1996 with the 1.52m telescope of the
Observatorio Astronomico Nacional (O.A.N.) at Calar Alto (Almeria,
Spain), and on the 25th and 26th of the same month using the 1m
Jakobus Kapteyn telescope at the Observatorio del Roque de los
Muchachos (O.R.M., Canary Islands, Spain). The reduction procedure
followed is explained in Rossello et al. (1985A&AS...59..399R 1985A&AS...59..399R) and
Landolt (1983, Cat. II/118; 1983AJ.....88..853L 1983AJ.....88..853L) standard stars were
used. We provide the V magnitude, the (V-R) and (V-I) colour indices,
their associated standard errors and the number of observations
performed for each star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 63 63 V, (V-R) and (V-I) of 63 Am stars
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP Hipparcos (Cat. I/239) number
8- 17 A10 --- HD/BD HD (Cat. III/135) or BD (Cat. I/122) number
19- 24 F6.3 mag Vmag V magnitude
26- 31 F6.3 mag e_Vmag Standard error on V magnitude
33- 38 F6.3 mag V-R (V-R) colour index
40- 45 F6.3 mag e_V-R Standard error on V-R
47- 52 F6.3 mag V-I (V-I) colour index
54- 59 F6.3 mag e_V-I Standard error on V-I
61 I1 --- o_Vmag Number of observations
63 A1 --- Note [D] 'D' if information about duplicity is
available (1)
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Note (1): HIP 1286: Joint photometry, system identified as multiple in the
Hipparcos Input Catalogue (Turon et al., 1992,
Cat. I/191, hereafter HIC),
CCDM 00161+0807 theta=142, rho=6.0, Delta m=4.5
HIP 2280: Joint photometry, system identified as multiple in HIC,
CCDM 00291+1119 theta=304, rho=4.0, Delta m=6.2
HIP 63179: Joint photometry, system identified as multiple in HIC,
CCDM 12566+4333 theta=211, rho=6.9, Delta m=5.5
HIP 64692: Joint photometry, system identified after publication of
HIC, CCDM 13555+4051 theta=21, rho=0.37, Delta m=3.6 (from
Hipparcos and Tycho Catalogues, ESA 1997, Cat. I/239;
hereafter HIP)
HIP 87641: Joint photometry, determined multiple by HIP,
CCDM 17541+4702 theta=162, rho=0.30, Delta m=2.04
HIP 99159: Joint photometry, determined multiple by HIP,
CCDM 20079+4600 theta=5, rho=2.91, Delta m=3.61
HIP 99211: Joint photometry, system identified as multiple in HIC,
CCDM 20085+4622 theta=43, rho=4.17, Delta m=3.03 (from HIP)
HIP 114501: Joint photometry, theta approx 180, rho approx 5,
Delta m approx 5
theta: position angle relative to reference component, from North
to the East (units are degrees)
rho: separation between components (units are arcsec)
Delta m: difference of magnitudes between components (units are mag)
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Acknowledgements: Francesca Figueras, Albert Domingo
(End) A. Domingo [Universitat de Barcelona], Patricia Bauer [CDS] 23-Feb-1999