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.
    <Astronomy Letters vol, page (2009)>
    =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