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J/AN/325/740      Astrophysical supplements to ASCC-2.5      (Kharchenko+, 2004)

Astrophysical supplements to the ASCC-2.5. II. Membership probabilities in 520 Galactic open cluster sky areas. Kharchenko N.V., Piskunov A.E., Roeser S., Schilbach E., Scholz R.-D. <Astron. Nachr., 325, 740-748 (2004)> =2004AN....325..740K
ADC_Keywords: Clusters, open; Combined data; Positional data; Proper motions; Parallaxes, trigonometric; Photometry; Spectral types; Stars, variable; Stars, double and multiple; Cross identifications Keywords: techniques: proper motions (stellar photometry) - catalogues - astrometry - stars: kinematics (membership probabilities) - Galaxy: star clusters (stellar content) Description: The catalogue of stars in the Galactic open cluster areas (CSOCA) is the result of the kinematic (proper motion), photometric and spatial member selection of stars listed in the homogeneous All-sky Compiled Catalogue of 2.5 Million Stars (ASCC-2.5, Cat. I/280) within 520 areas with open clusters selected from an on-line release 2.0 of catalogue by Dias et al. (2004,, Cat. VII/229). The areas represent quadratic fields centered at adopted cluster centers with side lengths of acl[deg]=2*(rcl+0.1), where rcl is the determined angular radius of the cluster. For clusters with rcl<0.4°, acl=1°. In every cluster area the CSOCA contains the complete list of the ASCC-2.5 stars. The catalog includes accurate J2000 equatorial coordinates, proper motions in the Hipparcos system, BV photometric data in the Johnson system, proper motion, photometric and spatial membership probabilities, and angular distances from the cluster centers for all included stars. If available, trigonometric parallaxes, multiplicity and variability flags from the ASCC-2.5, spectral types (from the ASCC-2.5 or the Tycho-2 Spectral Type Catalog III/231), and radial velocities with their errors from the Catalogue of Radial Velocities of Galactic Stars with high precision Astrometric Data (CRVAD, III/239) are also given. Since some cluster areas overlap each other some stars are included in the CSOCA several times. The catalogue contains 171319 entries for 149849 stars. Entries are sorted in right ascension J2000 order. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file csoca.dat 227 171319 The Catalog of Stars in the Open Cluster Areas cluster.dat 53 520 Cluster list
See also: I/280 : All-sky Compiled Catalogue of 2.5 million stars (Kharchenko 2001) III/239 : Radial Velocities with Astrometric Data (Kharchenko+ 2004) III/231 : The Tycho-2 Spectral Type Catalog (Wright+, 2003) VII/229 : Optically visible open clusters catalog (see also J/A+A/438/1163 : Open Cluster Diagrams Atlas (OCDA) (Kharchenko+, 2005) J/A+A/440/403 : 109 new Galactic open clusters (Kharchenko+, 2005) Byte-by-byte Description of file: csoca.dat
Bytes Format Units Label Explanations
1- 13 F13.9 h RAhour *Right Ascension J2000.0, Epoch=1991.25 14- 26 F13.8 deg DEdeg Declination J2000.0, Epoch=1991.25 27- 32 F6.1 mas e_RAhour Standard error in RA*cos(DE) 33- 38 F6.1 mas e_DEdeg Standard error in DEdeg 39- 47 F9.2 mas Plx ?=9999.99 Trigonometric parallax 48- 56 F9.2 mas e_Plx ?=999.99 Standard error in Plx 57- 65 F9.2 mas/yr pmRA Proper Motion in RA*cos(DEdeg) 66- 74 F9.2 mas/yr pmDE Proper Motion in DE 75- 81 F7.2 mas/yr e_pmRA Standard error in pmRA 82- 88 F7.2 mas/yr e_pmDE Standard error in pmDE 89- 95 F7.3 mag Bmag ?=99.999 B magnitude in Johnson system 96-102 F7.3 mag Vmag ?=99.999 V magnitude in Johnson system 103-109 F7.3 mag e_Bmag ?=9.999 Standard error on B magnitude 110-116 F7.3 mag e_Vmag ?=9.999 Standard error on V magnitude 117-123 F7.3 mag Scat ?=9.999 Scatter on magnitude 125 A1 --- v1 *[GN ] Known variability from GCVS/NSV 126 A1 --- v2 *[UVW ] Variability from Tycho-1 127 A1 --- v3 *[CDMPRU ] Variability type 128 A1 --- v4 *[VYIXR ] Variability from CMC11 129-130 A2 --- d12 *[A-S ] CCDM component identifier (Cat. I/274) 131 A1 --- d3 *[A-S ] Component identifier 132 A1 --- d4 *[DRSYZ ] Duplicity from Tycho-1 133 A1 --- d5 *[CGOVX ] Double/Multiple Systems flag 134 A1 --- d6 [D ] Duplicity flag from PPM 136-155 A20 --- SpType MK Spectral type (from I/280 or III/231) 156-162 I7 --- HIP ?=0 (I/239) Hipparcos number 163-169 I7 --- HD ?=0 HD (III/135) number 170-177 I8 --- ASCC ASCC-2.5 (I/280) number 178-183 I6 --- CRVAD ?=0 CRVAD (III/239) number 184-192 F9.2 km/s RV ?=999.99 Average Radial Velocity 193-199 F7.2 km/s e_RV ?=0.00 Mean standard error in RV 201-204 I4 --- Seq [1-520] Cluster sequential number, in cluster.dat file 205-211 F7.4 deg rad Distance from the cluster center 212-218 F7.4 --- Pkin [0,1] Membership probability from proper motion 219-225 F7.4 --- Pph [0,1] Membership probability from Photometry 227 I1 --- Psp *[0,1] Membership probability from position
Note on RAhour: RA = RAhour+24, if RAhour < 0 h RA = RAhour-24, if RAhour > 24 h Note on v1: Byte 292 from Tycho-1 file tyc_main.dat This flag is set when the variability is known, as follows: G = variable known in General Catalog of Variable Stars N = variable known in New Suspected Variables catalog Note on v2: Byte 294 from Tycho-1 file tyc_main.dat This flag has the following meaning: U = apparent variability in the Tycho data; may be due to duplicity V = strong evidence of intrinsic variability W = suspected intrinsic variability Note on v3: Byte 322 from Hipparcos file hip_main.dat Hipparcos-defined type of variability (a blank entry signifies that the entry could not be classified as variable or constant), as follows: C = no variability detected ("constant") D = duplicity-induced variability M = possibly micro-variable (amplitude < 0.03mag) P = periodic variable R = V-I colour index was revised due to variability analysis U = unsolved variable which does not fall in the other categories Note on v4: Flag from CMC11 catalogue V : variable star Y or I : if the CAMC did not measure the mag, an approximate value from other sources is given to a precision of 0.1 mag X or R : star fainter than 12 with unknown mag is given as 12. Note on d12: Bytes 149, 150 from Tycho-2 file catalog.dat. The CCDM component identifiers for double or multiple Hipparcos stars contributing to this Tycho-2 entry. Note on d3: Byte 41 from Hipparcos file hipdmcom.dat Note on d4: Byte 296 from Tycho-1 file tyc_main.dat Unresolved duplicity status from Tycho data analysis, as follows: D = duplicity clearly indicated (B_Tmag and V_Tmag refer to combined light) R = duplicity weakly indicated, combined with indication of variability S = duplicity suspected Y = investigation for duplicity carried out on Tycho data, no indication of duplicity was found Z = investigation for duplicity not carried out blank = Hipparcos star not observed by Tycho Note on d5: Byte 347 from Hipparcos file hip_main.dat Indicates that further details are given in the Hipparcos Double and Multiple Systems Annex, as follows: C = solutions for the components G = acceleration or higher order terms O = orbital solutions V = variability-induced movers (apparent motion arises from variability) X = stochastic solution (probably astrometric binaries with short period) Note on Psp: Psp = 1 if rad ≤ cluster radius Psp = 0 if rad > cluster radius
Byte-by-byte Description of file: cluster.dat
Bytes Format Units Label Explanations
1- 4 I4 --- 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
Acknowledgements: Ralf-Dieter Scholz, rdscholz(at)
(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

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