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J/ApJS/154/509      ACS Virgo Cluster Survey. II.            (Jordan+, 2004)
The ACS Virgo Cluster Survey. II. Data reduction procedures.
    Jordan A., Blakeslee J.P., Peng E.W., Mei S., Cote P., Ferrarese L.,
    Tonry J.L., Merritt D., Milosavljevic M., West M.J.
   <Astrophys. J. Suppl. Ser., 154, 509-517 (2004)>
   =2004ApJS..154..509J
ADC_Keywords: Clusters, galaxy ; Surveys

Keywords: galaxies: clusters: individual (Virgo) - methods: data analysis -
          surveys- techniques: image processing

Abstract:
    The ACS Virgo Cluster Survey is a large program to carry out
    multicolor imaging of 100 early-type members of the Virgo Cluster
    using the Advanced Camera for Surveys (ACS) on the Hubble Space
    Telescope. Deep F475W and F850LP images (∼SDSS g and z) are being used
    to study the central regions of the program galaxies, their globular
    cluster systems, and the three-dimensional structure of Virgo itself.
    In this paper, we describe in detail the data reduction procedures
    used for the survey, including image registration, drizzling
    strategies, the computation of weight images, object detection, the
    identification of globular cluster candidates, and the measurement of
    their photometric and structural parameters.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        57      500   Log of Observations for program GO-9401


See also:
     J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)
   J/ApJS/153/223 : ACS Virgo cluster survey. I (Cote+, 2004)
   J/ApJ/613/279  : ACS Virgo Cluster Survey. III. M87 (Jordan+, 2004)


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

   Bytes Format  Units     Label     Explanations

   1-  3  I3     ---       Seq       Internal identification number
   5-  8  I4     ---       VCC       Virgo Cluster Catalog number
  10- 19  A10 "YYYY/MM/DD" Obs.Date  Date of observation
  21- 29  A9     ---       D-ID      Dataset identification
  31- 38  A8     "h:m:s"   Obs.Time  UT time of observation (hh:mm:ss)
  40- 45  F6.2   deg       PA        Position angle of the WFC1 detector y axis
  47- 49  I3     s         Exp       Exposure time
  51- 56  A6     ---       Filt      Filter


History:
    From electronic version of the journal
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    28-Jan-2005