J/A+A/464/641 Double stars CCD photometry and astrometry. III (Lampens+, 2007)
Multicolour CCD measurements of visual double and multiple stars. III.
Lampens P., Strigachev A., Duval D.
<Astron. Astrophys. 464, 641 (2007)>
=2007A&A...464..641L 2007A&A...464..641L
ADC_Keywords: Stars, double and multiple ; Stars, nearby ; Photometry, CCD ;
Photometry, UBVRI
Keywords: stars: binaries: visual - techniques: photometric -
stars: fundamental parameters
Abstract:
Recent CCD observations were performed in the period 1998-2004 for a
large sample of visual double and multiple stars selected from the
Hipparcos Catalogue (Cat. I/239) and/or from the Gliese Catalogue of
Nearby Stars (Cat. V/70).
Accurate astrometric and photometric data allowing us to characterise
the individual components are provided. These data are compared to
Hipparcos data or to data from an older epoch to assess the nature of
the observed systems.
We simultaneously apply a Moffat-Lorentz profile with a similar shape
to all detected components and adjust the profile parameters from
which we obtain the relative astrometric position (epoch, position
angle, angular separation) as well as differential multi-colour
photometry (filters (B)VRI).
Description:
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 94 138 Astrometry of the observed stars
table5.dat 83 124 Differential photometry of the observed stars
table6.dat 90 63 Relative position compared to the
Hipparcos/CCDM data
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See also:
I/274 : CCDM (Catalog of Components of Double Multiple stars (Dommanget+ 2002)
J/A+A/374/132 : CCD photometry and astrometry of double stars (Lampens+, 2001)
J/A+A/422/1023 : Nearby visual double stars UBVRI photometry (Strigachev+ 2004)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 A12 -- Name Identifier of the star
14 A1 --- n_Name [*] * denotes two epochs for the same target
15- 17 A3 -- m_Name Double star component
19- 27 F9.4 yr Epoch Epoch in Besselian year
29- 30 I2 -- Nfr Number of frames
32- 37 F6.3 arcsec rho ?=- Angular separation
39- 43 F5.3 arcsec e_rho ?=- Standard error of angular separation
45- 50 F6.2 deg theta ?=- Position angle
52- 55 F4.2 deg e_theta ?=- Standard error of position angle
57- 59 A3 -- Tel Telescope (1)
61- 94 A34 -- Remark Remark
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Note (1): Telescope as follows:
2 = 2-m telescope at NAO Rozhen
0.6 = 60-cm telescope at AO Belogradchik
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 12 A12 -- Name Identifier of the star
14 A1 --- n_Name [*] * denotes two epochs for the same target
15- 17 A3 -- m_Name Double star component
19- 30 F12.4 d HJD Heliocentric Julian Date
32- 36 F5.3 mag DVmag Magnitude V difference of the components
38- 42 F5.3 mag e_DVmag Standard error of magnitude difference
44- 49 F6.3 mag D(B-V) ?=- B-V colour difference of the components
51- 55 F5.3 mag e_D(B-V) ?=- Standard error of colour difference
57- 62 F6.3 mag D(V-R) ?=- V-R colour difference of the components
63 A1 --- u_D(V-R) [)] Uncertainty flag on DV-DR
65- 69 F5.3 mag e_D(V-R) ?=- Standard error of colour difference
70 A1 --- ueD(V-R) [)] Uncertainty flag on e_DV-DR
72- 77 F6.3 mag D(V-I) ?=- V-I colour difference of the components
79- 83 F5.3 mag e_D(V-I) ?=- Standard error of colour difference
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 12 A12 -- Name Identifier of the star
14 A1 --- n_Name [*] * denotes two epochs for the same target
15- 17 A3 -- m_Name Double star component
19- 20 I2 -- Nfr Number of frames
22- 28 F7.2 yr Epoch Epoch in Bessel year (1)
30- 35 F6.3 arcsec rho Angular separation
37- 42 F6.2 deg theta Position angle
44- 49 F6.3 arcsec Drho Comparison with Hipparcos/CCDM
angular separation
51- 58 F8.3 deg Dtheta Comparison with Hipparcos/CCDM position angle
60- 65 F6.3 arcsec Dpos Comparison with Hipparcos/CCDM
relative position
67- 90 A24 -- Code Remarks concerning the system (2)
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Note (1): Epoch: 1991.25 from Hipparcos else epoch from CCDM
Note (2): Codes as follows:
L = optical
M = motion
O = orbital
S = stable
* = 180° converted
** = alternative Hipparcos solution
Pap II = Lampens & Strigachev, 2004, Cat. J/A+A/422/1023
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Acknowledgements:
Patricia Lampens, Patricia.Lampens(at)oma(be)
Anton Strigachev, Anton.Strigachev(at)oma(be)
References:
Lampens & Strigachev, Paper I 2001A&A...368..572L 2001A&A...368..572L
Lampens & Strigachev, Paper II 2004A&A...422.1023S 2004A&A...422.1023S, Cat. J/A+A/422/1023
(End) Patricia Vannier [CDS] 21-Dec-2006