On the Absolute Age of the Globular Cluster M92
We present precise and deep optical photometry of the globular M92. Data were collected in three different photometric systems: Sloan Digital Sky Survey (g ', r ', i ', and z '; MegaCam at CFHT), Johnson-Kron-Cousins ( B , V , and I ; various ground-based telescopes), and Advanced Camera for Surveys (ACS) Vegamag (F475W, F555W, and F814W; Hubble
di Cecco, A. et al.
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2010