Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file cocd.dat 205 520 The Catalogue cluster.dat 53 520 Cluster list notes.dat 80 488 Individual notes atlas/* 0 520 *Individual PostScripts plots
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
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) : Open clusters and Galactic Structure Byte-by-byte Description of file: cocd.dat
Bytes Format Units Label Explanations
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
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", 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
Byte-by-byte Description of file: cluster.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 3 I03 --- Seq Cluster number 5- 80 A76 --- Note Text of the note
Acknowledgements: Ralf-Dieter Scholz, rdscholz(at) 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
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

catalogue service

© Université de Strasbourg/CNRS

    • Contact