ACDS V10.0 - Detailed Description of J/AJ/123/855

ACDS V10.0 - Sun Jan 19 02:53:06 CET 2025

| # Detailed Description of J/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMC (Zaritsky+, 2002) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    J/AJ/123/855    Magellanic Clouds Photometric Survey: the SMC  (Zaritsky+, 2002)
    ================================================================================
    The Magellanic Clouds Photometric Survey:
    the Small Magellanic Cloud stellar catalog and extinction map.
        Zaritsky D., Harris J., Thompson I.B., Grebel E.K., Massey P.
       <Astron. J. 123, 855 (2002)>
       =2002AJ....123..855Z
    ================================================================================
    ADC_Keywords: Magellanic Clouds ; Photometry, UBVRI ; Photometry, infrared

    Keywords: catalogs - dust, extinction - galaxies: photometry -
              galaxies: stellar content - Magellanic Clouds

    Abstract:
        We present our catalog of U, B, V, and I stellar photometry of the
        central 18°2 area of the Small Magellanic Cloud. We combine our
        data with the Two Micron All Sky Survey (2MASS) and Deep Near-Infrared
        Southern Sky Survey (DENIS) catalogs to provide, when available, U
        through Ks data for stars. Internal and external astrometric and
        photometric tests using existing optical photometry (U, B, and V from
        Massey's (ApJS, in press) bright star catalog; B, V, and I from the
        microlensing database of OGLE; and I from the near-infrared sky survey
        DENIS) are used to determine the observational uncertainties and
        identify systematic errors. We fit stellar atmosphere models to the
        optical data to check the consistency of the photometry for individual
        stars across the passbands and to estimate the line-of-sight
        extinction. Finally, we use the estimated line-of-sight extinctions to
        produce an extinction map across the Small Magellanic Cloud, and we
        investigate the nature of extinction as a function of stellar
        population.

    Description:
        The data come from the Magellanic Cloud Photometric Survey (Zaritsky
        et al. 1997AJ....114.1002Z). Using the 1m Las Campanas Swope telescope
        and the Great Circle Camera (Zaritsky et al. 1996PASP..108..104Z) with
        a 2K CCD, we obtained drift-scan images for both Magellanic Clouds in
        the Johnson U, B, and V and the Gunn I between 1996 November and 1999
        December. The effective exposure time is between 4 and 5 minutes and
        the pixel scale is 0.7''/pix. Typical seeing is 1.5'', and scans with
        seeing worse than 2.5'' are not accepted. Magnitudes are placed on the
        Johnson-Kron-Cousins photometric system. Only stars with both B and V
        detections are included in the final catalog.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table1.dat       113  5156057   MCPS Catalog (Small Magellanic Cloud)

    See also:
           B/2mass : The 2MASS database (IPAC/UMass, 2000)
           B/denis : The DENIS database (Epchtein+, 1999)
           II/228  : DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000)
           II/236  : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)
     J/AJ/128/1606 : Magellanic Clouds Photometric Survey: the LMC (Zaritsky+, 2004)
     J/A+AS/135/133 : First DENIS I-band extragalactic catalog (Vauglin+ 1999)
       J/AcA/48/147 : OGLE SMC BVI photometry (Udalski+ 1998)
       J/AcA/48/563 : OGLE SMC eclipsing binaries BVI photometry (Udalski+ 1998)
       J/AcA/49/437 : BVI photometry of OGLE SMC Cepheids (Udalski+, 1999)
       J/AcA/49/543 : OGLE LMC + SMC Cepheids VI photometry (Pietrzynski+, 1999)

    Byte-by-byte Description of file:  table1.dat

       Bytes Format Units   Label     Explanations

       1-  9  F9.6  h       RAhr      Hour of Right Ascension (J2000)
      11- 19  F9.5  deg     DEdeg     Decimal degree of Declination (J2000)
      21- 26  F6.3  mag     Umag      ?=0.000 The U band magnitude (1)
      28- 32  F5.3  mag     e_Umag    The 1{sigma} error in Umag
      34- 39  F6.3  mag     Bmag      ?=0.000 The B band magnitude
      41- 45  F5.3  mag     e_Bmag    The 1{sigma} error in Bmag
      47- 52  F6.3  mag     Vmag      ?=0.000 The V band magnitude
      54- 58  F5.3  mag     e_Vmag    The 1{sigma} error in Vmag
      60- 65  F6.3  mag     Imag      ?=0.000 The I band magnitude
      67- 71  F5.3  mag     e_Imag    The 1{sigma} error in Imag magnitude
      73- 74  I2    ---     Flag      Quality flag (2)
      76- 81  F6.3  mag     Jmag      ?=0.000 2MASS or DENIS J band magnitude (1)
      83- 87  F5.3  mag     e_Jmag    ?=0.000 The 1{sigma} error in Jmag
      89- 94  F6.3  mag     Hmag      ?=0.000 2MASS H band magnitude (1)
      96-100  F5.3  mag     e_Hmag    ?=0.000 The 1{sigma} error in Hmag
     102-107  F6.3  mag     Ksmag     ?=0.000 2MASS or DENIS Ks band magnitude (1)
     109-113  F5.3  mag     e_Ksmag   ?=0.000 The 1{sigma} error in Kmag

    Note (1): 0.00 if star not detected.

    Note (2): The unique sum of several flags given below.
        0 = no flag;
        1 = star for which we replaced photometry with that from Massey's
            catalog (Massey P., 2001, ApJS, in press);
        2 = star for which we replaced photometry with that from OGLE;
       10 = star with a successful stellar atmosphere model ({chi}2<3) fit;
       20 = star with an unsuccessful stellar atmosphere model fit.

    Nomenclature note:
        Table 1: sources are <MCPS H.hhhhhh+DD.ddddd> in Simbad.

    History:
        From electronic version of the journal
    ================================================================================
    (End)                    Greg Schwarz [AAS], Patricia Bauer [CDS]    07-Mar-2002