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J/ApJS/177/174             Star clusters in M31                (Narbutis+, 2008)
A survey of star clusters in the M31 southwest field:
UBVRI photometry and multiband maps.
    Narbutis D., Vansevicius V., Kodaira K., Bridzius A., Stonkute R.
   <Astrophys. J. Suppl. Ser., 177, 174-180 (2008)>
   =2008ApJS..177..174N
ADC_Keywords: Photometry, UBVRI ; Clusters, globular ; Galaxies, nearby

Keywords: galaxies: individual (M31) - galaxies: star clusters


Abstract:
    A new survey of star clusters in the southwest field of the M31 disk
    based on the high-resolution Subaru Suprime-Cam observations is
    presented. The UBVRI aperture CCD photometry catalog of 285 objects
    (V≲20.5mag; 169 of them identified for the first time) is
    provided. Each object is supplemented with multiband color maps
    presented in the electronic edition of the Astrophysical Journal
    Supplement. Seventy-seven star cluster candidates from the catalog are
    located in the Hubble Space Telescope archive frames.

Description:
    The Suprime-Cam survey of star cluster-like objects was conducted in
    the southwest (SW) field of the M31 disk, centered at
    RA(J2000)=0h40.9m and DE(J2000)=+40°45'.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat       116      285   UBVRI photometry data of the star cluster
                             candidates in the M31 S-W field


See also:
  J/PASJ/56/1025 : Compact star clusters in SW field of M31 (Kodaira+, 2004)
   J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)
    J/PASP/119/7 : HST WFPC2 star clusters in M31 (Krienke+, 2007)
   J/A+A/471/127 : New globular clusters in M 31 (Galleti+, 2007)
    J/PASP/120/1 : HST WFPC2 star clusters in M31. II. (Krienke, 2008)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label   Explanations

   1-  2  A2    ---     ---     [KW]
   3-  5  I03   ---     KW      [1,285] Star cluster candidate identification
                                (<[NVK2008] KWNNN> in Simbad)
   7- 15  F9.6  deg     RAdeg   Right Ascension in decimal degrees (J2000) (1)
  17- 25  F9.6  deg     DEdeg   Declination in decimal degrees (J2000) (1)
  27- 32  F6.3  mag     Vmag    Johnson V band aperture, not total, magnitude
  34- 39  F6.3  mag     U-B     Johnson (U-B) color index
  41- 46  F6.3  mag     B-V     Johnson (B-V) color index
  48- 53  F6.3  mag     V-Rc    Johnson-Cousins (V-R) color index
  55- 60  F6.3  mag     Rc-Ic   ?=99.999 Johnson-Cousins (R-I) color index (2)
  62- 66  F5.3  mag     e_Vmag  1σ error in Vmag
  68- 72  F5.3  mag     e_U-B   1σ error in U-B
  74- 78  F5.3  mag     e_B-V   1σ error in B-V
  80- 84  F5.3  mag     e_V-Rc  1σ error in V-Rc
  86- 91  F6.3  mag    e_Rc-Ic  ?=99.999 1σ error in Rc-Ic (2)
      93  I1    ---     Nm      Number of independent measurements (3)
  95- 98  F4.1  arcsec  Ap      Aperture size (4)
     100  A1    ---     HST     HST instrument frame identification (5)
 102-116  A15   ---     XID     Cross identification(s) (6)

Note (1): Of aperture centers in the USNO-B1.0 catalog system.

Note (2): the 5 objects saturated in the I-band images have 99.999

Note (3): In the LGGS fields F6-F9.

Note (4): Diameter of circular aperture or major axis length of elliptical
     aperture. Elliptical apertures (ratio of minor to major axis; position
     angle of the major axis, calculated counterclockwise from the North
     direction) are used for objects KW102 (0.75; 120°) and KW141
     (0.70; 30°).
Note (5): 77 total objects in the HST instrument frames.
     Frame identification is:
    W = WFPC2 (71 objects)
    A = ACS (6 objects)
Note (6): The cross-identification stars by a number related to:
    1 = The Revised Bologna Catalogue of M31 globular clusters and candidates
        V.3.2, July 2007 (Galleti et al., 2007, Cat. J/A+A/471/127):
        69 objects (in Simbad: G is SKHB, V is [V62], B is Bol, BH is M31GC)
        KW128 is identified with V203 and KW129 - with V202, however,
        coordinates are offset;
        KW271 and KW273 are identified as one object - G099.
    2 = Krienke & Hodge (2007, Cat. J/PASP/119/7): "KHM31" numbers are given
        only for 24 objects not listed in '1' (KHM31 NNN in Simbad).
        KW154 has two identifications: KHM31-79 and KHM31-80.
    3 = Kodaira et al. (2004, Paper I, Cat. J/PASJ/56/1025): "KWC" and "KWE"
        numbers are given for 58 objects.
        KW063 is identified with KWE09 and KW095 - with KWE19, however,
        center coordinates and apertures are slightly different.


History:
    From electronic version of the journal
(End)                 Greg schwarz [AAS], Emmanuelle Perret [CDS]    16-Jul-2009