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 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 1997AJ....114.1002Z). Using the 1m Las Campanas Swope telescope
and the Great Circle Camera (Zaritsky et al. 1996PASP..108..104Z 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 5156057 MCPS Catalog (Small Magellanic Cloud)
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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
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Bytes Format Units Label Explanations
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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 1σ error in Umag
34- 39 F6.3 mag Bmag ?=0.000 The B band magnitude
41- 45 F5.3 mag e_Bmag The 1σ error in Bmag
47- 52 F6.3 mag Vmag ?=0.000 The V band magnitude
54- 58 F5.3 mag e_Vmag The 1σ error in Vmag
60- 65 F6.3 mag Imag ?=0.000 The I band magnitude
67- 71 F5.3 mag e_Imag The 1σ 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 1σ 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 1σ 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 1σ error in Kmag
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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 (χ2<3) fit;
20 = star with an unsuccessful stellar atmosphere model fit.
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Nomenclature note:
Table 1: sources are in Simbad.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 07-Mar-2002