A Magnitude-Redshift Relation for Distant Clusters of Galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present photometry for X-ray selected clusters of galaxies at redshifts between z ~ 0.1 and z ~ 0.6. We construct a luminosity function to which the Schechter function is fit. This fit is used to search for a magnitude-redshift relation for mL5, the magnitude at which the integral over the Schechter fit is equal to five, in clusters with spectroscopically determined redshifts. We show that with the use of standard calibration techniques, a relation exists which will allow redshifts to be determined photometrically to within Delta z / z ~ 10%.

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