J/A+A/511/A38 Open clusters in third galactic quadrant (Vazquez+, 2010)
Open clusters in the third galactic quadrant. III. Alleged binary clusters.
Vazquez R.A., Moitinho A., Carraro G., Dias W.S.
<Astron. Astrophys., 511, A38-38 (2010)>
=2010A&A...511A..38V 2010A&A...511A..38V
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI
Keywords: Galaxy: structure - open clusters and associations: general
Abstract:
We aim to determine accurate distances and ages of eight open clusters
in order to: (1) assess their possible binarity (2) provide probes to
trace the structure of the Third Galactic Quadrant.
Cluster reddenings, distances, ages and metallicities are derived from
ZAMS and isochrone fits in UBVRI photometric diagrams. Field
contamination is reduced by restricting analysis to stars within the
cluster limits derived from star counts. Further membership control is
done by requiring that stars have consistent positions in several
diagrams and by using published spectral types.
Description:
Observations and data reductions are extensively described in Paper I
(2001A&A...370..436M 2001A&A...370..436M). Briefly, observations were acquired in two
runs (1994 and 1998) at the CTIO 0.9m telescope. Both runs used the
same Tek 2048x2048 CCD and the standard set of UBVRI filters available
at CTIO.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 72 8 Position of cluster centres and estimated radii
table1.dat 104 3018 Czernik 29 and Haffner 10 photometric data
table2.dat 104 2304 Haffner 18 and Haffner 19 photometric data
table3.dat 104 2682 NGC 2383 and NGC 2384 photometric data
table4.dat 104 2951 Ruprecht 158 and Ruprecht 72 photometric data
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See also:
J/A+A/445/493 : UBV(RI)c photometry of NGC 2425 and NGC 2635 (Moitinho+, 2006)
Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Cluster Cluster name
10- 15 F6.2 deg GLON Galactic longitude
17- 21 F5.2 deg GLAT Galactic latitude
23- 24 I2 h RAh Right ascension (J2000)
26- 27 I2 min RAm Right ascension (J2000)
29- 30 I2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 40 I2 arcsec DEs Declination (J2000)
42- 45 F4.2 arcmin r ?=- Estimated radius
47- 61 A15 --- SName Simbad name of the cluster
63- 72 A10 --- Table Name of the table containing the photometry
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Byte-by-byte Description of file: table1.dat table2.dat table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Star number decreasing V magnitude sequential
order, within the table
6- 9 A4 --- OName ? Star number, SNNp, NGC 2384 NN in Simbad
from Fitzgerald & Moffat, 1974AJ.....79..873F 1974AJ.....79..873F
11- 15 A5 --- [FM74] ? Star number, NNNNA, [FM74] NNNNA
from Fitzgerald & Moffat, 1974AJ.....79..873F 1974AJ.....79..873F
17- 27 F11.7 deg RAdeg Right ascension n decimal degrees (J2000.0)
29- 39 F11.7 deg DEdeg Declinationn decimal degrees (J2000.0)
41- 46 F6.3 mag Vmag Johnson V magnitude
48- 52 F5.3 mag e_Vmag Error in V magnitude as given by DAOPHOT
54- 59 F6.3 mag B-V ? Johnson B-V colour index
61- 65 F5.3 mag e_B-V ? Error in B-V colour index as given by DAOPHOT
67- 72 F6.3 mag U-B ? Johnson U-B colour index
74- 78 F5.3 mag e_U-B ? Error in U-B colour index as given by DAOPHOT
80- 85 F6.3 mag V-Rc ? Johnson-Cousins V-R colour index
87- 91 F5.3 mag e_V-Rc ? Error in V-Rc colour index as given by DAOPHOT
93- 98 F6.3 mag V-Ic ? Johnson-Cousins V-I colour index
100-104 F5.3 mag e_V-Ic ? Error in V-Ic colour index as given by DAOPHOT
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Author's address:
Ruben Vazquez [FCAG-UNLP;IALP-CONICET], rvazquez(at)fcaglp.unlp.edu.ar
References:
Moitinho, Paper I 2001A&A...370..436M 2001A&A...370..436M
Moitinho et al., Paper II 2006A&A...445..493M 2006A&A...445..493M, Cat. J/A+A/445/493
(End) Ruben A. Vazquez [Argentina], Patricia Vannier [CDS] 29-Nov-2010