Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apjs...56..143c&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 56, Sept. 1984, p. 143-192.
Astronomy and Astrophysics
Astrophysics
94
Astronomical Photometry, Galactic Clusters, Calibrating, Colorimetry, Luminosity, Magnitude, Prisms, Red Shift, Space Density
Scientific paper
The photographic photometry of 14 clusters of galaxies in the redshift range from 0.18 to 0.39 is presented. Extreme care was taken to ensure that the observations were based on one photometric system using the limits of deep, prime-focus plates obtained with the Anglo-Australian and Cerro Tololo 4 m telescopes. It is found that the sub-beam prisms used in the observation appear to be achromatic and provide photometry which is linear over a range of at least 4.0 mag. The zero-point error in the observations was about + or - 0.04 in both magnitude and color, and the measurement error was equal to about 0.08 mag (BJ - RF), with 0.10 near the bright limit of 18.0 mag, and 0.18 at the faint limit of 22.0 mag. A series of tables is given which provides the number of density profiles, color magnitude arrays, and luminosity functions for each cluster.
Couch Warrick J.
Newell E. B.
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