B/ocl Optically visible open clusters and Candidates (Dias+ 2002-2015)
New catalog of optically visible open clusters and candidates (V3.5)
Dias W.S., Alessi B.S., Moitinho A., Lepine J.R.D.
<Astron. Astrophys. 389, 871 (2002)>
=2002A&A...389..871D 2002A&A...389..871D
ADC_Keywords: Clusters, open ; Proper motions ; Radial velocities ;
Abundances, [Fe/H]
Keywords: galaxy: open clusters and associations: general - catalogs
Description:
We have compiled a new catalogue of open clusters in the Galaxy which
updates the previous catalogues of Lynga (1987, Cat. VII/92) and of
Mermilliod (1995, in Information and On-Line Data in Astronomy, ed. D.
Egret & M. A. Albrecht (Dordrecht: Kluwer), 127) (included in the
WEBDA database, http://obswww.unige.ch/webda). New objects and new
data, in particular, data on kinematics (proper motions) that were not
present in the old catalogues, have been included. Virtually all the
clusters (2167) presently known were included, which represents an
increment of about 986 objects relative to the Lynga (1987, VII/92)
catalogue. The catalogue is presented in a single table containing all
the important data, which makes it easy to use.
In total, 99.7% of the objects have estimates of their apparent
diameters, and 74.5% have distance, E(B-V) and age determinations.
Concerning the data on kinematics, 54.7% have their mean proper
motions listed, 25% their mean radial velocities, and 24.2% have both
information simultaneously.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
whatsnew.txt 177 8771 Statistics and History of the Catalogue
clusters.dat 152 2167 The Catalogue Data File (V3.5)
refs.dat 130 92 References for proper motions and radial velocities
removed.dat 174 147 Removed clusters (V3.5)
sources.dat 182 1803 References (V3.5)
phot.dat 44 569 Available photometric data (on Jan 23 2002)
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See also:
VII/92 : Open Cluster Data 5th Edition (Lynga 1987)
VII/101 : Star Clusters/Associations. III. Open Clusters (Ruprecht+ 1983)
http://www.astro.iag.usp.br/ocdb/ : Open clusters and Galactic structure
http://obswww.unige.ch/webda : WEBDA database
Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Cluster Cluster name
19- 20 I2 h RAh Right Ascension J2000 (hours)
22- 23 I2 min RAm Right Ascension J2000 (minutes)
25- 26 I2 s RAs Right Ascension J2000 (seconds)
28 A1 --- DE- Declination J2000 (sign)
29- 30 I2 deg DEd Declination J2000 (degrees)
32- 33 I2 arcmin DEm Declination J2000 (minutes)
35- 36 I2 arcsec DEs Declination J2000 (seconds)
38- 39 A2 --- Class Flag for classification of the cluster (G1)
42- 47 F6.1 arcmin Diam [0.2/1400]? Angular apparent diameter
49- 53 I5 pc Dist [25/15000]? Distance from WEBDA
55- 59 F5.3 mag E(B-V) [0/6]? Colour excess in BV
61- 66 F6.3 [yr] Age [6/10.1]? Age (in log t)
68- 74 F7.2 mas/yr pmRA ? Mean proper motion of the cluster in RA
76- 79 F4.2 mas/yr e_pmRA ? Standard deviation in pmRA
81- 87 F7.2 mas/yr pmDE ? Mean proper motion of the cluster in Dec
89- 92 F4.2 mas/yr e_pmDE ? Standard deviation in pmDE
94- 98 I5 --- Nc [1/14341]? Estimated number of cluster members
100-102 A3 --- r_pmRA Source of mean pm determination, in refs.dat
105-111 F7.2 km/s RV ? Radial Velocity
114-118 F5.2 km/s e_RV ? Error in Radial Velocity
120-122 I3 --- o_RV [0/537]? Number of stars used to determine RV
124-127 A4 --- r_RV Source of mean RV determination, in refs.dat
129-134 F6.3 Sun [Fe/H] [-1.6/0.5]? Metallicity
136-140 F5.3 Sun e_[Fe/H] ? Error in [Fe/H]
142-143 I2 --- o_[Fe/H] [0/60]? Number of stars used
to determine [Fe/H]
145-152 A8 --- TrType Trumpler type determined in the DSS inspection
(concentration-brightness-richness-nebulosity)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference code
8- 26 A19 --- BibCode Bibcode of the references
28-130 A103 --- Text Author(s) names and comments
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Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Object Objects associated with the reference
25-182 A158 --- Com Comments, including the bibcode
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Byte-by-byte Description of file: removed.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Cluster Cluster name
19- 20 I2 h RAh Right Ascension J2000 (hours)
22- 23 I2 min RAm Right Ascension J2000 (minutes)
25- 26 I2 s RAs Right Ascension J2000 (seconds)
29 A1 --- DE- Declination J2000 (sign)
30- 31 I2 deg DEd Declination J2000 (degrees)
33- 34 I2 arcmin DEm Declination J2000 (minutes)
36- 37 I2 arcsec DEs Declination J2000 (seconds)
41- 46 F6.1 arcmin Diam ? Angular apparent diameter
50- 78 A29 --- Reason Reason of removing the cluster
80-174 A95 --- Ref Reference used for deletion
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Byte-by-byte Description of file: phot.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Cluster Cluster name
19- 23 A5 --- CCD [UBVRI ] Bands observed with CCD
25- 29 A5 --- Pe [UBVRI ] Bands observed with photomultipliers
31- 33 A3 --- Pg [UBV ] Bands observed with photographic plates
35- 44 A10 --- Alias Other name
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Global notes:
Note (G1): The flag has the following meaning:
a = possible asterism/dust hole/star cloud (no cluster)
cr = Cluster Remnant (Pavani and Bica 2007A&A...468..139P 2007A&A...468..139P)
d = dubious, objects considered doubtful by the DSS images inspection
e = embedded open cluster (or cluster associated with nebulosity)
g = possible globular cluster
m = possible moving group
n = "non-existent NGC" (RNGC, Sulentic, 1979, Cat. VII/1). Some of
Bica's POCRs (Possible Open Cluster Remnant, 2001A&A...366..827B 2001A&A...366..827B)
are also "non-existent NGC" objects.
nf = objects not found in the DSS images inspection (wrong coordinates?)
o = possible OB association (or detached part of)
oe = o + e
oev = o + e + v
p = POCR (Possible Open Cluster Remnant) - Bica et al., 2001A&A...366..827B 2001A&A...366..827B
r = recovered, i.e. "non-existent NGC" that are well visible
in the DSS images inspection
v = clusters with variable extinction (Ahumada et al., 2001A&A...377..845A 2001A&A...377..845A)
OC = likely cluster (Kronberger M, private communication)
OC? = possible cluster (Kronberger M, private communication)
IR = discovered in infra-red but are visible in the DSS images inspection
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History (see also the file "whatsnew.txt"):
Version of 08-Aug-2002 at http://www.astro.iag.usp.br/~wilton
Version of 01-Jun-2003 at http://www.astro.iag.usp.br/~wilton (version 1.5)
Version of 03-Jul-2003 at http://www.astro.iag.usp.br/~wilton (version 1.6)
Version of 03-Sep-2003 at http://www.astro.iag.usp.br/~wilton (version 1.7)
Version of 10-Sep-2003 at http://www.astro.iag.usp.br/~wilton (version 1.8)
Version of 15-Feb-2004 at http://www.astro.iag.usp.br/~wilton (version 1.9)
Version of 07-Jun-2004 at http://www.astro.iag.usp.br/~wilton (version 2.0)
Version of 06-Jan-2005 at http://www.astro.iag.usp.br/~wilton (version 2.1)
Version of 14-Jan-2006 at http://www.astro.iag.usp.br/~wilton (version 2.4)
Version of 17-Sep-2007 at http://www.astro.iag.usp.br/~wilton (version 2.8)
Version of 23-Apr-2008 at http://www.astro.iag.usp.br/~wilton (version 2.9)
Version of 19-Feb-2009 at http://www.astro.iag.usp.br/~wilton (version 2.10)
Version of 23-Apr-2010 at http://www.astro.iag.usp.br/~wilton (version 3.0)
Version of 28-Jan-2012 at http://www.astro.iag.usp.br/~wilton (version 3.2)
* 19-Sep-2002: Galactic coordinates and proper motions recomputed
from the equatorial position. Stored as catalog VII/229
* 12-Jan-2006: Installation of version 2.4 (VII/229)
* 02-Oct-2007: Installation of version 2.8 (B/ocl).
In file "phot.dat" a few names were changed to match the cluster
names in the files "clusters.dat" and "removed.dat":
Basel 19 = Hogg 16 ; Collinder 258 = Harvard 5;
ESO 096-04 = BH 144; Stock 7 = Markarian 6
* 27-Apr-2010: Installation of version 3.0 (2095 clusters), from
http://www.astro.iag.usp.br/~wilton
* 30-Jan-2012: Installation of version 3.2 (2134 clusters), from
http://www.astro.iag.usp.br/~wilton
* 16-Jan-2013: Installation of version 3.3 (2174 clusters), from
http://www.astro.iag.usp.br/~wilton
* 30-Jun-2013: Installation of version 3.4 (2168 clusters), from
http://www.astro.iag.usp.br/~wilton
* 11-sep-2015: Installation of version 3.4b (corrections)
* 17-feb-2016: Installation of version 3.5
Acknowledgements:
Extensive use has been made of the Simbad and WEBDA databases.
This project is supported by FAPESP (grant number 03/12813-4)
and CAPES (CAPES-GRICES grant number 040/2008)
(End) Francois Ochsenbein [CDS] 13-Oct-2014