V/132 SAI Open Clusters Catalog (Glushkova+, 2009)
Automated search for star clusters in large multiband surveys. II.
Discovery and investigation of open clusters in the Galactic plane
Glushkova E.V., Koposov S.E., Zolotukhin I.Yu., Beletsky Y.V., Vlasov A.D.,
Leonova S.I.
<Pis'ma Astron. Zh. 36, 83 (2010))
=2010PAZh...36...83G 2010PAZh...36...83G
=2010AstL...36...75G 2010AstL...36...75G
ADC_Keywords: Clusters, open ; Galactic plane ; Milky Way
Keywords: Galaxy: structure - open clusters and associations: general -
Surveys - Catalogs
Abstract:
The automated search for star clusters of J,H,K_s data from the
Two Micron All-Sky Survey (2MASS) was made using a new method
based on the convolution with density functions (Koposov et al.
2008A&A...486..771K 2008A&A...486..771K). In two papers (this one and Koposov et al.
2008A), 168 new clusters were found and verified in the range of
galactic latitude |b|<24 degrees. The new method to estimate main
physical parameters of clusters was developed, which involves three
different techniques: Hess-diagram, color-magnitude diagrams in
(J,J-H) and (Ks,J-Ks), and radial density distribution. Color
excesses E(B-V), distance moduli and ages were determined for 141 new
and 27 known, but poorly studied clusters. We present the Sternberg
Astronomical Institute Open Clusters Catalog (SAI OCL Catalog) of
coordinates, diameters and main physical parameters of these clusters.
The parameters for 9 clusters were determined using J,H,K data from
UKIDSS GPS. For 26 new embedded clusters, we publish the coordinates
and diameters only. To facilitate the access to these data and its
scientific analysis, we have developed a dedicated web-site of the
catalog available at http://ocl.sai.msu.ru/
Description:
Data for 194 open clusters are listed. We provide color excesses
E(B-V), distance moduli and ages with corresponding errors for 168
clusters. Lack of the errors in ages indicates that it was only
possible to determine the upper limit of the age estimation. For
26 clusters we give the coordinates and diameters only.
Clusters which name starts with 'SAI' or 'Koposov' were discovered or
verified in the frame of this study; remaining clusters were known
before but either have incorrect/inconsistent parameter estimations or
do not have them at all.
Tabular data, color-magnitude diagrams with fitted isochrones,
Hess-diagrams and quick-look cluster images, as well as catalogs of
UBVRI CCD photometry (where available) can be accessed from individual
cluster web-pages at SAI OCL Catalog web-site either through the
web-browser or by means of common programming interfaces.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 102 194 SAI Open Clusters Catalog
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Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name ! Cluster name
17- 31 A15 --- OtherName Other name known for the cluster
33- 40 F8.4 deg RAdeg += Right ascension (J2000)
42- 49 F8.4 deg DEdeg Declination (J2000)
51- 54 F4.1 arcmin Diam Cluster diameter
56- 59 F4.2 mag E(B-V) ? Color excess E(B-V)
61- 64 F4.2 mag e_E(B-V) ? Color excess error
66- 69 F4.2 --- Eratio ? E(J-H)/E(J-K) ratio
71- 75 F5.2 mag Dm ? Distance modulus (m - M)
77- 80 F4.2 mag e_Dm ? Distance modulus error
82- 86 I5 pc Dist ? Heliocentric distance
88- 91 I4 pc e_Dist ? Distance error
93- 97 F5.2 [yr] Age ? Age, or age upper limit if AgeError is empty
99-102 F4.2 [yr] e_Age ? Age error
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References:
Koposov S.E., Glushkova E.V., Zolotukhin I.Yu., 2008A&A...486..771K 2008A&A...486..771K,
Automated search for Galactic star clusters in large multiband surveys. I.
Discovery of 15 new open clusters in the Galactic anticenter region
(End) Ivan Zolotukhin [SAI MSU, Russia] 28-Sep-2009