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J/A+A/422/1023  Nearby visual double stars UBVRI photometry (Strigachev+, 2004)

Multicolour CCD measurements of nearby visual double stars. II. Strigachev A., Lampens P. <Astron. Astrophys. 422, 1023 (2004)> =2004A&A...422.1023S
ADC_Keywords: Stars, double and multiple ; Stars, nearby ; Photometry, CCD ; Photometry, UBVRI Keywords: stars: binaries: visual - techniques: photometric - stars: fundamental parameters Abstract: We present accurate CCD astrometric and photometric data for 31 nearby visual double stars in the standard filters BVRI. The observations were collected with a 1.3-m telescope in 2001-2002. The results consist of relative astrometric positions (epoch, angular separation and position angle) and differential BVRI photometry of the components. Mean errors are: 0.01" for the separation; 0.06° for the position angle; and 0.015mag for the photometric data. Comparing the relative positions at different epochs, we evaluate the physical association of the systems. We additionally derive fractional masses and true separations for the most probable binary systems and, whenever orbits are available, also total and component masses. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 106 31 Astrometric results and comparison of the relative positions with the Hipparcos data table5.dat 62 28 Differential photometry
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (I/239) number 7 A1 --- --- [/] 8- 9 I2 --- n_HIP ? Last two digit of the second HIP number when double 11- 19 F9.4 yr Epoch Epoch in Bessel year 21- 26 F6.3 arcsec rho Angular separation 28- 32 F5.3 arcsec e_rho rms uncertainty on rho 34- 39 F6.2 deg theta Position angle (measured from North to East) 41- 44 F4.2 deg e_theta rms uncertainty on theta 46- 51 F6.3 arcsec Drho Angular separation difference (our - HIP) 53 A1 --- n_Drho [1] Note on Drho (1) 56- 61 F6.2 deg Dtheta Position angle difference (our - HIP) 63 A1 --- n_Dtheta [1] Note on Dtheta (1) 66- 71 F6.3 arcsec Dpos Position difference (our - HIP) 73 A1 --- n_Dpos [1] Note on Dpos (1) 76-106 A31 --- Rem Remarks
Note (1): 1: Comparison of the position with respect to the position at epoch 2002.318 by Mason et al., 2004, Cat. J/AJ/127/539
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (I/239) number 7 A1 --- --- [/] 8- 9 I2 --- n_HIP ? Last two digit of the second HIP number when double 13- 17 F5.3 mag DVmag Magnitude difference of the components in V 19- 23 F5.3 mag e_DVmag rms uncertainty on e_DVmag 25- 30 F6.3 mag D(B-V) ? B-V colour index difference of the components 32- 36 F5.3 mag e_D(B-V) ? rms uncertainty on D(B-V) 38- 43 F6.3 mag D(V-R) ? V-R colour index difference of the components 45- 49 F5.3 mag e_D(V-R) ? rms uncertainty on D(V-R) 51- 56 F6.3 mag D(V-I) ? V-I colour index difference of the components 58- 62 F5.3 mag e_D(V-I) ? rms uncertainty on D(V-I)
Table5b: Differential R photometry ------------------------------------------------------ HIP DRmag e_DRmag D(R-I) e_D(R-I) ------------------------------------------------------ 79492 0.041 0.004 -- -- 97292 0.954 0.004 0.246 0.006 106694 1.742 0.017 0.478 0.002 Acknowledgements: Anton Strigachev , Patricia Lampens , References: Lampens & Strigachev, Paper I 2001A&A...368..572L
(End) Patricia Vannier [CDS] 29-Apr-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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