Christoph U. Keller   Associate Astronomer/Tenure   National Solar Observatory   950 N. Cherry Ave.    Tucson, Arizona, 85719, USA   Phone: (520) 318-8445, FAX: (520) 318-8278   Internet: ckeller@noao.edu

Current Research

• Solar magnetic fields: observations, interpretation, and analysis of numerical MHD models
• High-precision polarimetry of the sun and stars in the visible and infrared
• High spatial resolution techniques: adaptive optics, speckle imaging, and phase-diversity
• Design and construction of solar and night-time instruments and telescopes
• Detector development for polarimetry and hyperspectral imaging

Current Projects

• Advanced Technology Solar Telescope (ATST)
• Charge-Caching CMOS detector for Polarimetry (C3PO)
• Frequency Agile Solar Radio Telescope (FASR)
• Low-cost adaptive optics
• McMath-Pierce Solar Telescope
• PEPSI with ICE for the Large Binocular Telescope
• Synoptic Optical Long-term Investigations of the Sun (SOLIS)
• Sunrise 1-m solar balloon telescope

Past Projects

• Flare Genesis Experiment in Antarctica 1995/1996
• Spectral Hole-Burning Device