THE ACIS PSF
CALIBRATION DATA AND MODELING Leisa K. Townsley
Patrick S. Broos
Rita M. Sambruna
John A. Nousek
Ann E. Hornschemeier Penn State University
Department of Astronomy & Astrophysics

• INTRODUCTION
• PSF BROADENING WITH OFF-AXIS ANGLE
• THE ACIS PSF ON-AXIS
• PILEUP EFFECTS
• MONTE CARLO SIMULATIONS
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