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J/AJ/105/1822       Open clusters near eta Car                  (Cudworth+ 1993)

Proper motions, membership, and photometry of open clusters near eta Carinae Cudworth K.M., Martin S.C., Degioia-Eastwood K. <Astron. J. 105, 1822 (1993)> =1993AJ....105.1822C
ADC_Keywords: Clusters, open; Positional data; Proper motions; Photometry Abstract: Proper motions and photographic photometry have been derived for nearly 600 stars with 7.5 < V < 15.5 in the region of the very young open clusters Tr 14, Tr 16, and Cr 232 based on 26 plates dating from 1893 to 1990. Cluster membership probabilities have been derived from the proper motions and color-magnitude diagrams of probable members of each cluster are presented. In contrast to a few of the previous studies we find all three clusters to lie at the same distance. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 66 577 Positions, proper motions, photometry, and membership probabilities
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Star identification number (2) 9- 16 F8.1 arcsec X X coordinate (1) 17- 24 F8.1 arcsec Y Y coordinate (1) 26- 32 I7 10uas/yr pmX Relative proper motion in X 33- 36 I4 10uas/yr e_pmX rms uncertainty on pmX 37- 43 I7 10uas/yr pmY Relative proper motion on Y 44- 47 I4 10uas/yr e_pmY rms uncertainty on pmY 50- 55 F6.2 mag Vmag V magnitude 56- 61 F6.2 mag B-V B-V color 62- 66 I5 % Member Calculated membership probability
Note (1): X, Y positions are given in a coordinate system that is aligned with right ascension and declination of equator and equinox 1950, but positions are epoch 1975. The zero point of these offsets is star Y1 (Vmag=12.82) which lies at 10:42:32.87 -59:20:29.0 (equator and equinox 1950) Note (2): Letters correspond to: FA = Feinstein et al. (1973A&AS...12..331F) FB = Feinstein (1982AJ.....87.1012F) HD = Henry Draper Catalogue (Cat. III/135) Y = This study
References: Feinstein, A. 1982, AJ, 87, 1012 (1982AJ.....87.1012F) Feinstein, A., Marraco, H. G., & Muzzio, J. C. 1973, A&AS, 12, 331 Origin: AAS CD-ROM series, Volume 1, 1993 * 20-Jul-2001: table3.dat, line 1, corrected HD92350 into HD93250.
(End) Patricia Bauer [CDS] 06-Jul-1994
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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