This is achieved by actively tracking compound pendulations via a three-axis gimballed platform, which provides sky-fixed telescope stability at < 500 mas and corrects for field rotation, while employing high-bandwidth tip/tilt optics to remove residual disturbances across the science imaging focal plane. It utilizes a robust active stabilization system that has consistently demonstrated a 48 mas 1 σ sky-fixed pointing stability over multiple 1 h observations at float. The Super-pressure Balloon-borne Imaging Telescope (SUPERBIT) is a diffraction-limited, wide-field, 0.5 m telescope capable of exploiting these observing conditions in order to provide exquisite imaging throughout the near-infrared to near-ultraviolet. a)Author to whom correspondence should be addressed: Īt a fraction of the total cost of an equivalent orbital mission, scientific balloon-borne platforms, operating above 99.7% of the Earth’s atmosphere, offer attractive, competitive, and effective observational capabilities-namely, space-like seeing, transmission, and backgrounds-which are well suited for modern astronomy and cosmology.12 Department of Physics and Astronomy, The University of Sheffield, Hounsfield Road, Sheffield S3 7RH, United Kingdom.11 Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, United Kingdom.10 Jet Propulsion Laboratory (JPL), California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA.George Street, Toronto, Ontario M5R 2M8, Canada 9 Department of Physics, University of Toronto, 60 St.George Street, Toronto, Ontario M5S 3H4, Canada 8 Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St.7 Department of Astronomy, University of Toronto, 50 St.6 Institute of Theoretical Astrophysics, University of Oslo, Blindern, Oslo 0315, Norway. 5 Department of Astronomy/Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721, USA.4 University of Toronto Institute for Aerospace Studies (UTIAS), 4925 Dufferin Street, Toronto, Ontario M3H 5T6, Canada.3 Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom.2 Centre for Advanced Instrumentation (CfAI), Durham University, South Road, Durham DH1 3LE, United Kingdom.1 Department of Physics, Princeton University, Jadwin Hall, Princeton, New Jersey 08544, USA.
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