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LMCCLUSTRS: Help

LMCCLUSTRS - LMC Clusters Catalog


Overview

A new catalogue of clusters in the Large Magellanic Cloud has been constructed from searches of the IIIa-J component of the ESO/SERC Southern Sky Atlas. The catalogue contains coordinate and diameter measurements of 1762 clusters in a 25 deg x 25 deg area of sky centered on the LMC, but excluding the very crowded 3.5 square deg region around the Bar. The distribution of these clusters appears as two superimposed elliptical systems. The higher density inner system extends over about 8 deg; the lower density outer system can be represented by 13 deg X 10 deg disc inclined at 42 deg to the line of sight. There are suggestions of two weak "arms" in the latter.

Catalog Bibcode

1990A&AS...84..527K

References

The Cluster System of the Large Magellanic Cloud
    Kontizas M., Morgan D.H., Hatzidimitriou D., Kontizas E.
    <A&AS, 84, 527 (1990)>
    =1990A&AS...84..527K

Parameters

BII
The Galactic latitude of the cluster.

Cluster_Class
A code for the description of the cluster, set to 'C' if it appeared compact, or to 'L' if it appeared loose.

Dec
The declination of the cluster in the selected equinox. This was given in J1950 equatorial coordinates to a precision of 1 arcsecond in the original table.

Diameter
The diameter of the cluster, in parsecs. These values were calculated from the measured angular diameters using a distance modulus for the LMC of 18.5 (Westerlund 1989).

Kmhk_Number
KMHK Designation of cluster

LII
The Galactic longitude of the cluster.

Name
Name of the cluster

  Note (1): Acronyms are as follows:
         N = NGC (New General Catalogue)
        IC = Index Catalogues
        SL = Shapley & Lindsay 1963
        LW = Lynga & Westerlund 1963
        HS = Hodge & Sexton 1966
        OH = Olszewski & al. 1988
      A colon after the name indicates that the cluster is incorrectly
      marked in the Hodge-Wright Atlas (1967)

  Note (2): (Table 2)
    The following clusters have cross-identifications as shown:
      HS25   =   LW45                    LW38   not   SL24
      HS62   =   SL102                   LW97    =    SL135
      HS110  =   LW1131                  LW344   =    SL798
      HS149  =   LW151 (not SL279)       LW351   =    N2162 (not SL814)
      HS215  =   LW181                   LW452   =    SL876
      HS330  =   LW224                   SL786   =    N2151
      HS450  =   LW371                   SL798  not   N2151
      HS453  =   LW402 (= SL844)

     The following clusters in the Hodge (1980,1988) papers should have
     cross-identifications as shown:
      H 1.5  =   HS43                    H 10.189 = HS154
      H 1.25 =   HS65                    H 10.190 = HS156
      H 9.73 =   SL154                   H 10.198 = SL300
      H 9.79 =   SL162

    The N,SL,HS and LW identifications are as in Note (1) above;
    the H identifications refer to Hodge (1980,1938), with the first
    numerical component in the identification number referring to
    the field, and the second to the number within that field.

  Note (3): (Table 3)
    Objects previously classified as clusters but excluded from catalog
    (Table 1). The numerical codes "c" are as follows:
          1  Nothing detected            4   Association
          2  Asterism or bright star     5   Nebula and/or dust cloud
          3  Galaxy                      6   Uncertain classification

    NGC objects
      No  c      No  c      No  c      No  c     No  c
    ---------------------------------------------------
    1557  1    1763  5    1929  5    1962  5   2035  5
    1641  3    1769  5    1933  6    1965  5   2040  4
    1669  3    1773  5    1934  5    1966  5   2069  4
    1715  5    1820  4    1935  5    1970  5   2082  3
    1737  6    1848  4    1936  5    2020  5   2103  5
    1745  2    1892  3    1937  5    2029  5   2150  3
    1747  4    1895  2    1945  5    2032  5   2187  3
    1748  5    1925  4    1948  4    2034  4   2199  3
    1760  4

    IC objects
      No  c      No  c      No  c      No  c     No  c
    ---------------------------------------------------
    2105  5    2115  5    2126  5    2127  5   2128  5
    2114  5    2116  5

    SL objects
      No  c      No  c      No  c      No  c     No  c
    ---------------------------------------------------
      18  1      73  1     279  1     681  1    875  1
      20  2      78  3     289  2     705  3    878  1
      21  2      97  2     305  6     741  1    879  3
      24  2     104  3     313  1     785  4    880  1
      31  3     159  1     442  3     820  1    887  3
      32  3     182  1     447  1     847  3    889  1
      38  2     185  1     532  2     851  1    894  3
      54  2     220  1     545  2     856  3    898  3
      69  5     277  3     673  4

    HS objects
      No  c      No  c      No  c      No  c     No  c
    ---------------------------------------------------
       1  3      17  3      53  1     163  1    312  6
       2  3      18  3      54  3     170  6    339  6
       3  2      19  3      55  2     171  3    344  1
       4  3      20  3      57  2     176  2    364  2
       5  3      21  3      69  3     183  3    392  3
       6  3      22  2      71  3     204  3    394  3
       7  3      24  1      79  2     209  2    418  6
       9  3      25  3      89  3     222  2    423  5
      10  1      29  2     123  3     244  4    449  3
      11  3      34  2     126  1     246  1    451  3
      12  1      42  2     145  2     271  2    452  3
      14  2      45  3     146  3     276  2    454  3
      15  2      47  3     150  3     278  3    455  3
      16  2      49  6     160  2     297  6

    LW objects
      No  c      No  c      No  c      No  c     No  c
    ---------------------------------------------------
       6  1      52  2     113  1     291  2    396  3
      10  1      54  2     118  1     300  6    415  1
      19  1      67  2     120  3     304  1    429  3
      26  1      70  3     210  6     334  6    435  3
      29  1      71  3     224  1     338  1    439  3
      40  1      74  2     230  6     340  1    443  1
      42  2      90  3     253  1     349  1    464  1
      45  1      92  1     257  1     351  1    465  3
      49  1      93  2     275  5     377  3    476  3
      51  1

    OH objects
      No  c      No  c      No  c      No  c     No  c
    ---------------------------------------------------
       5  6      13  2      20  6      24  6     28  3
       7  6      18  6      23  6      26  6     32  6
  

RA
The right ascension of the cluster in the selected equinox. This was given in J1950 equatorial coordinates to a precision of 0.1 seconds of time in the original table.


Contact Person

Questions regarding the LMCCLUSTRS database table can be addressed to the HEASARC User Hotline.
If you have any problems, please consult the help page or mail ledas-help@star.le.ac.uk
 
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