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/journal_tables/ApJ/562/303/

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J/ApJ/562/303  Old Stellar Populations of the SMC                (Dolphin+ 2001)
================================================================================
Old Stellar Populations of the Small Magellanic Cloud
     Dolphin A.E., Walker A.R., Hodge P.W., Mateo M., Olszewski E.W.,
     Schommer R.A., Suntzeff N.B.
     <Astrophys. J. 562, 303 (2001)>
     =2001ApJ...562..303D
================================================================================
ADC_Keywords: Magellanic Clouds ; Populations, stellar
Mission_Name: HST

Description:
     Photometry is given for six data sets of SMC photometry, all in the
     V and I bands.  Field names in the file summary below are the names
     used in the STScI archive for the WFPC2 observations.  WFPC2
     observations of NGC 121 and the SMC fields reach limiting magnitudes
     of V=26 and I=25.5; ground-based observations cover a square region
     of 14.5 arcmin on a side and reach V=25.5 and I=24.5.


File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
field1.dat      41        952    SMC-004600-703500 photometry
field2.dat      41       1180    SMC-004900-704800 photometry
field3.dat      41       1039    SMC-004612-704700 photometry
field4.dat      41        970    SMC-004900-703300 photometry
ground.dat      41      16110    Ground-based photometry
ngc121.dat      41      16710    NGC121 photometry
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Byte-by-byte Description of file: field1.dat field2.dat field3.dat field4.dat
Byte-by-byte Description of file: ngc121.dat
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   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
       1  A1     ---     Chip     WFPC2 chip number; 1=PC1, 2=WFC2, etc.
   3-  8  F6.2   pix     X       *X position
  10- 15  F6.2   pix     Y       *Y position
  17- 22  F6.3   mag     V        V magnitude
  24- 28  F5.3   mag     dV       V uncertainty
  30- 35  F6.3   mag     I        I magnitude
  37- 41  F5.3   mag     dI       I uncertainty
--------------------------------------------------------------------------------
Note on X and Y: Positions are given in the HSTphot system; (0.5,0.5) refers
  to the center of the lower-left pixel.

Byte-by-byte Description of file: ground.dat
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   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1-  7  F7.2   pix     X       *X position
   9- 15  F7.2   pix     Y       *Y position
  17- 22  F6.3   mag     V        V magnitude
  24- 29  F6.3   mag     V-I      V-I color
  31- 35  F5.3   mag     dV       V uncertainty
  37- 41  F5.3   mag     dV-I     V-I uncertainty
--------------------------------------------------------------------------------
Note on X and Y: Positions are given in the DAOPHOT system; (1.0,1.0) refers
  to the center of the lower-left pixel.

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(End)            Andrew Dolphin [NOAO]                               10-Dec-2001