The Shane-Wirtanen counts

Details The Shane-Wirtanen counts The Shane-Wirtanen counts

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287l..55g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. L55-L58.

Other

66

Astronomical Maps, Correlation, Cosmology, Galaxies, Cartesian Coordinates, Galactic Clusters, Image Processing

Scientific paper

It is shown that the 2.5 degree-break in the galaxy correlation function derived from the Shane-Wirtanen star counts is indistinguishable from an artifact introduced by residual systematic variations in the effective magnitude limit from plate to plate. In order to avoid the introduction of a break, the maximum error from plate to plate must be no more than about 0.05 mag. Other large scale features in the data which are also affected by the systematic variations are discussed.

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