J/A+AS/139/425 CCD photometry and astrometry of double stars (Cuypers+, 1999)
CCD photometry and astrometry of visual double and multiple stars of the
HIPPARCOS catalogue. II. CCD photometry and differential astrometry of 288
southern "intermediate" systems
Cuypers J., Seggewiss W.
<Astron. Astrophys. Suppl. Ser. 139, 425 (1999)>
=1999A&AS..139..425C 1999A&AS..139..425C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Photometry, CCD
Keywords: stars: binaries: visual - astrometry
Abstract:
We present photometric and astrometric data of about 280 visual double
stars of the "intermediate" class, i.e. with angular separations
mainly in the range 2"<ρ<12". The observations have been obtained
in 1991-92 with a CCD camera attached to the 91cm Dutch telescope at
ESO La Silla, Chile. Differential magnitudes of the double star
components as well as magnitudes and colour indices of the individual
components have been determined in the Cousins V and I passbands with
an internal error of about 0.005mag and an external accuracy of less
than 0.03mag. In addition, angular separations have been secured to an
internal accuracy of 0.004" and position angles to about 0.05°.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 288 Astrometric and photometric differential results
(instrumental V and I) of the CCD observations for
visual binaries
table2.dat 113 71 Astrometric and photometric
differential results (instrumental V and I) of the
CCD observations for visual binaries with more
than one sequence of measurements
table3.dat 104 237 Photometric results (V and I) of the CCD
observations for visual binaries
table4.dat 104 45 Photometric results (V and I) of the CCD
observations for visual binaries with more than
one sequence of measurements
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star designation
16 A1 --- Note1 Standard type (1)
18- 25 F8.3 yr Date Date of observation (Besselian year)
27 A1 --- Note2 Note to table1.dat (2)
29- 31 I3 --- Nobs Total number of observations
33- 39 F7.3 arcsec rho Mean separation
41- 47 F7.3 arcsec e_rho ? Standard error of the mean separation
49- 54 F6.2 deg theta Mean position angle
56- 61 F6.2 deg e_theta ? Standard error of the mean position angle
63- 69 F7.3 arcsec rVI ? Distance between the V and I parameters
71- 77 F7.3 arcsec rNH ? Distance between this observation and the
corresponding Hipparcos (Cat. I/239) result
79- 81 I3 --- o_Vmag Number of observations in filter V
82- 88 F7.3 mag DVmag ? Magnitude difference between component A
and B in (instrumental) V
89- 95 F7.3 mag e_DVmag ? Standard error of the mean magnitude
difference between component A and B in
(instrumental) V
97- 99 I3 --- o_Imag Number of observations in filter I
100-106 F7.3 mag DImag ? Magnitude difference between component A
and B in (instrumental) I
107-113 F7.3 mag e_DImag ? Standard error of the mean magnitude
difference between component A and B in
(instrumental) I
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Note (1): a: Astrometric standard
p: Photometric standard
Note (2): *: more than one sequence of measurements (see Table 2)
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star designation
15 A1 --- Note1 Standard type (1)
17- 28 F12.4 d JD Julian date
30 A1 --- Note2 Note to table3.dat (2)
32- 37 F6.3 mag VmagA V magnitude of component A
38- 43 F6.3 mag e_VmagA Standard error of the mean on V magnitude of
component A
45- 50 F6.3 mag VmagB V magnitude of component B
51- 56 F6.3 mag e_VmagB Standard error of the mean on V magnitude of
component B
58- 63 F6.3 mag DVmag Magnitude difference between component A and B
in V
65- 67 I3 --- o_Vmag Number of observations in filter V
69- 74 F6.3 mag V-IA Colour index V-I of component A
75- 80 F6.3 mag e_V-IA Standard error of the mean of the colour index
of component A
82- 87 F6.3 mag V-IB Colour index V-I of component B
88- 93 F6.3 mag e_V-IB Standard error of the mean of the colour index
of component B
95- 97 I3 --- o_Imag Number of observations in filter I
99-104 F6.3 mag DV-I Colour index V-I difference between component
A and B
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Note (1): a: Astrometric standard
p: Photometric standard
Note (2): *: more than one sequence of measurements (see Table 4)
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Acknowledgements: Jan Cuypers
References:
Oblak et al., Paper I. 1999A&A...346..523O 1999A&A...346..523O
(End) Patricia Bauer [CDS] 07-Sep-1999