The APM galaxy survey: Some data reduction techniques

  • S. J. Maddox
  • J. Loveday
  • W. J. Sutherland
  • G. Efstathiou
I Two-Dimensional Distribution of Galaxies
Part of the Lecture Notes in Physics book series (LNP, volume 310)


We have used the Automatic Plate Measuring machine in Cambridge to scan 176 photographic survey plates from the UK Schmidt Telescope and have compiled a galaxy catalogue covering 4400 degrees2 and containing over four million galaxies with B J < 21. We give a brief description of the plate material, measuring procedure and data reduction techniques. The star-galaxy separation technique and tests of its reliability are described. CCD observations of groups of faint galaxies have been used to construct 66 photometric sequences of galaxies in the range BJ = 17 – 21.


Surface Brightness Data Reduction Technique Equal Area Projection Lower Surface Brightness Magnitude Limit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • S. J. Maddox
    • 1
  • J. Loveday
    • 1
  • W. J. Sutherland
    • 1
  • G. Efstathiou
    • 1
  1. 1.Institute of AstronomyCambridge, EnglandUK

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