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 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, http://www.astro.iag.usp.br/~wilton,
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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
csoca.dat 227 171319 The Catalog of Stars in the Open Cluster Areas
cluster.dat 53 520 Cluster list
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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 http://www.astro.iag.usp.br/~wilton)
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
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Bytes Format Units Label Explanations
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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
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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
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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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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
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Acknowledgements: Ralf-Dieter Scholz, rdscholz(at)aip.de
(End) Patricia Vannier [CDS] 26-Jul-2005