J/A+A/416/811 V and R CCD photometry of visual binaries (Abad+, 2004)
Reduction of CCD Observations of Visual Binaries, using the "Tepui"
Function as PSF.
Abad C., Docobo J.A., Lanchares V., Lahulla J.F., Abelleira P.,
Blanco J., Alvarez C.
<Astron. Astrophys. 416, 811 (2004)>
=2004A&A...416..811A 2004A&A...416..811A
ADC_Keywords: Stars, double and multiple ; Photometry, CCD
Keywords: stars: general - astrometry - techniques: photometric
Abstract:
429 CCD measurements of relative positions and magnitude differences
in V and R photometric bands for 165 visual double and multiple stars
are given. CCD frames were taken at the 1.52m Spanish telescope of the
Spanish-German Center of Astronomy at Calar Alto (Almeria, Spain).
During the reduction process a "Tepui" function was used as the PSF
function.
Description:
Table 1 gives relevant data for the visual binaries observed.
Observations were carried out over a short period of time, therefore
we assign the mean epoch (1998.58) for the totality of data. Data of
individual stars are presented as average data with errors, by
parameter, when various observations have been calculated, as well as
the number of observations involved. Errors corresponding to
astrometric relative positions between components are always present.
For single observations, parameter fitting errors, specially for dx
and dy parameters, have been calculated analysing the chi2 test
around the minimum. Following the rules for error propagation, theta
and rho errors can be estimated. Then, Table 1 shows single
observation errors with an additional significant digit.
When a star does not have known references, we include it in Table 2,
where J2000 position and magnitudes are from the USNO-A2.0 catalogue
(Monet et al., 1998, Cat. I/252).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 307 Main catalogue
table2.dat 80 18 Supplement catalogue
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See also:
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
I/237 : The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
I/281 : WDS 2001.0 (Mason+ 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS designation, JHHMMm+DDMM, based on J2000
position (Mason et al., 2001, Cat. I/281)
14- 26 A13 --- Name Binary name, (Mason et al., 2001, Cat. I/281)
30- 34 I5 --- ADS ADS number (Aiken, 1932ADS...C......0A 1932ADS...C......0A)
38- 42 F5.1 deg theta Position angle
45- 48 F4.2 deg e_theta rms uncertainty on theta
51- 55 F5.2 arcsec rho Separation angle
58- 62 F5.3 arcsec e_rho rms uncertainty on rho
65- 69 F5.2 mag Dmag ? Difference of magnitude of the components
in R or V band
72- 75 F4.2 mag e_Dmag ? rms uncertainty on Dmag
78 A1 --- Band [RV] Filter used
80 I1 --- o_Dmag Number of observation
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000) (1)
4- 5 I2 min RAm Right ascension (J2000) (1)
7- 12 F6.3 s RAs Right ascension (J2000) (1)
15 A1 --- DE- Declination sign (J2000) (1)
16- 17 I2 deg DEd Declination (J2000) (1)
19- 20 I2 arcmin DEm Declination (J2000) (1)
22- 26 F5.2 arcsec DEs Declination (J2000) (1)
29- 32 F4.1 mag Rmag ? Magnitude of the A component (1)
38- 42 F5.1 deg theta Position angle
45- 48 F4.2 deg e_theta rms uncertainty on theta
51- 55 F5.2 arcsec rho Separation angle
58- 62 F5.3 arcsec e_rho rms uncertainty on rho
65- 69 F5.2 mag Dmag ? Difference magnitude of the components
in R or V band
72- 75 F4.2 mag e_Dmag ? rms uncertainty on Dmag
78 A1 --- Band [RV] Filter used
80 I1 --- o_Dmag Number of observation
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Note (1): From USNO-A2.0 (Cat. I/252) catalogue
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Acknowledgements: Carlos Abad
(End) Patricia Bauer [CDS] 22-Dec-2003