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

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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