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The Shane-Wirtanen counts - Observer and time-dependent effectsIn a recent paper, de Lapparent, Kurtz, and Geller (1986) announce the discovery of possible observer and time-dependent effects in the counts of galaxies in the Lick catalog and suggest that these effects may have distorted the galaxy correlation function calculated by Groth and Peebles (1986) from the Lick counts. In particular, they suggest that these effects may have introduced a break where none exists or may have diluted a break stronger than that seen by Groth and Peebles. The Lick counts have been reexamined and it is found that the observer and time-dependent effects are marginal and that they can have had only a negligible effect on the estimates of the correlation functions. Correlation functions have been calculated for each observer and time period separately and it is found that they all depart from the small-angle power law at about the expected scale. Further, the average of these correlation functions agrees extremely well with the average correlation function published by Groth and Peebles.
Document ID
19870036578
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Groth, Edward J.
(Princeton Univ. NJ, United States)
Peebles, P. J. E.
(Princeton University NJ, United States)
Date Acquired
August 13, 2013
Publication Date
November 15, 1986
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 310
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
87A23852
Funding Number(s)
CONTRACT_GRANT: NAS5-25084
CONTRACT_GRANT: NAS5-29142
CONTRACT_GRANT: NSF PHY-84-19908
Distribution Limits
Public
Copyright
Other

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