J/A+A/438/1163 Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)
Astrophysical parameters of Galactic open clusters.
Kharchenko N.V., Piskunov A.E., Roeser S., Schilbach E., Scholz R.-D.
<Astron. Astrophys. 438, 1163 (2005)>
=2005A&A...438.1163K 2005A&A...438.1163K
ADC_Keywords: Clusters, open ; Radial velocities ; Proper motions ; Photometry
Keywords: techniques: photometric - catalogs - astrometry - stars: kinematics -
open clusters and associations: general - Galaxy: stellar content
Description:
The catalogue is a result of studies of wide neighborhoods of 513 open
clusters and 7 compact associations carried out in high precision
homogeneous all sky catalogue ASCC-2.5 (Kharchenko, 2001, Cat.
I/280). On the basis of data on about 33000 possible members
(including about 10000 most probable ones) and homogeneous methods of
cluster parameter determination the angular sizes of cluster cores and
coronae, cluster heliocentric distances, mean proper motions, mean
radial velocities and ages were established and collected in the COCD.
These include cluster distances for 200 clusters, average cluster
radial velocities for 94 clusters, and cluster ages for 195 clusters
derived for the first time. Clusters in the catalogue are sorted by
right ascension J2000 order.
The Open Cluster Diagrams Atlas (OCDA) presents a set of open cluster
diagrams used for the determination of parameters of 513 open clusters
and 7 compact associations, and is intended to illustrate the quality
of the constructed cluster membership (Kharchenko et al., 2004, Cat.
J/AN/425/740), and the accuracy of the derived cluster
parameters (this paper). Every diagram presents relation between
various stellar data from all sky catalogue ASCC-2.5 (Kharchenko 2001,
Cat. I/280) in area of the specific cluster. There are five diagrams
provided for every cluster in the Atlas: the area map, the density
profile, the vector point diagram, the magnitude equation diagram, and
the color-magnitude diagram. The OCDA consists of 520 PostScript plots
stored as gzipped files (i.e. one file per cluster).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cocd.dat 205 520 The Catalogue
cluster.dat 53 520 Cluster list
notes.dat 80 488 Individual notes
atlas/* . 520 *Individual PostScripts plots
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Note on atlas/* : The file name includes the sequential number of the
corresponding cluster "Seq" and the cluster designation "Name" from file
cluster.dat. For example, the file with the plot of the 12th cluster IC 1590
(NGC 281) is named 012IC1590.ps.gz
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See also:
J/A+A/440/403 : 109 new Galactic open clusters (Kharchenko+, 2005)
I/280 : All-sky Compiled Catalogue of 2.5 million stars (Kharchenko 2001)
J/AN/325/740 : Astrophysical supplements to ASCC-2.5 (Kharchenko+, 2004)
III/239 : Radial Velocities with Astrometric Data (Kharchenko+ 2004)
http://www.astro.iag.usp.br/~wilton : Open clusters and Galactic Structure
Byte-by-byte Description of file: cocd.dat
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Bytes Format Units Label Explanations
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2- 4 I03 --- Seq [1-520] Cluster sequential number
6- 22 A17 --- Name NGC, IC or other common designation
24- 40 A17 --- OName Other designation of the cluster
43- 48 F6.3 h RAhour Adopted cluster center in RA J2000.0
50- 55 F6.2 deg DEdeg Adopted cluster center in Dec J2000.0
57- 62 F6.2 deg GLON Galactic longitude
64- 69 F6.2 deg GLAT Galactic latitude
72- 75 F4.2 deg Rco Angular radius of the core
78- 81 F4.2 deg Rcl Angular radius of the cluster
84- 89 F6.2 km/s RV ?=999.99 Average radial velocity
92- 96 F5.2 km/s e_RV ?=0.00 Standard error in RV
99-100 I2 --- n_RV ?=0 Number of stars used for RV calculation
103-108 F6.2 mas/yr pmRA Average proper motion in RA*cos(DE)
111-114 F4.2 mas/yr e_pmRA Standard error in pmRA
117-122 F6.2 mas/yr pmDE Average proper motion in DE
125-128 F4.2 mas/yr e_pmDE Standard error in pmDE
131-136 F6.2 mas/yr pmGLON Average proper motion in l*cos(b)
139-144 F6.2 mas/yr pmGLAT Average proper motion in b
146-148 I3 --- N1s Number of the most probable (1 sigma) members
151-154 I4 pc Dist Distance
157-160 F4.2 mag E(B-V) Colour-excess
162-166 F5.2 mag V-Mv Apparent distance modulus
168 I1 --- r_Dist *Source of distance and E(B-V)
171-174 F4.2 [yr] logt Logarithm of average age
177-178 I2 --- o_logt *[-3,50] Number of stars used for logt
calculation
181-186 F6.2 km/s RVref ?=999.99 RV from literature
189-193 F5.2 km/s e_RVref ?=0.00 Standard error in RVref
195 I1 --- r_RVref *?=0 Source of RVref
198-201 F4.2 [yr] logtref ?=0.00 Average age from literature
203 I1 --- r_logtref *?=0 Source of logtref
205 I1 --- n_Seq [0,1] 1 indicates a note detailed in notes.dat
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Note on r_Dist, r_RVref, r_logtref:
These flags have the following meaning:
1 = Dias et al., 2004, Open clusters and Galactic structure,
Version 2.0", http://www.astro.iag.usp.br/~wilton
2 = Kharchenko et al., 2005
3 = Loktin, 2004, Private communication
4 = Lynga, 1987 "Catalogue of open clusters data. Fifth edition"
5 = Robichon et al., 1999, Cat. J/A+A/345/471
6 = Ruprecht et al., 1981, Cat VII/31
7 = de Zeeuw et al., 1999, Cat. J/AJ/117/354
Note on o_logt:
The negative numbers have the following meaning:
-1 = when logt is found with help of a star located to the left of the blue
limit of the evolved MS,
-2 = when logt is found with help of a star located to the right of the red
limit of the evolved MS,
-3 = if logt has been set manually
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Byte-by-byte Description of file: cluster.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- Seq [1-520] Cluster sequential number
6- 38 A33 --- Name NGC, IC or other common designation
40- 46 F7.3 h RAhour Right Ascension J2000.0
47- 53 F7.2 deg DEdeg Declination J2000.0
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I03 --- Seq Cluster number
5- 80 A76 --- Note Text of the note
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Acknowledgements: Ralf-Dieter Scholz, rdscholz(at)aip.de
History:
* 26-Jul-2005: Original version
* 20-Oct-2005: Atlas files (atlas/*) replaced by a version slightly
modified from the author (density profiles scales)
(End) Patricia Vannier [CDS] 26-Jul-2005