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J/AstL/vol/page SAI Open Clusters Catalog (Glushkova+, 2009)
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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.

=2009AstL...VVV.ppppI
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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 Two Micron All
Sky Survey (2MASS) was made using new method based on the convolution with
density functions (Koposov et al., 2008). In two papers (this one and
Koposov et al., 2008) 168 new clusters were found and verified in the range
of the 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
(K_s,J-K_s), 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 RA += Right ascension (J2000)
42- 49 F8.4 deg DE Declination (J2000)
51- 54 F4.1 arcmin Diameter Diameter
56- 59 F4.2 mag Ebv ? Color excess E(B-V)
61- 64 F4.2 mag EbvError ? Color excess error
66- 69 F4.2 --- EjhEjk ? E(J-H) / E(J-K) ratio
71- 75 F5.2 mag Dm ? Distance modulus (m - M)
77- 80 F4.2 mag DmError ? Distance modulus error
82- 86 I5 pc Dist ? Distance
88- 91 I4 pc DistError ? Distance error
93- 97 F5.2 [yr] Age ? Age, or age upper limit if AgeError is empty
99-102 F4.2 [yr] AgeError ? Age error
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References:
Koposov S.E., Glushkova E.V., Zolotukhin I.Yu., 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
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(End) Ivan Zolotukhin [SAI MSU, Russia] 28-Sep-2009