4 papers · 1 filter
High Contrast Imaging with Gaussian Aperture Pupil Masks
J. H. Debes, J. Ge, C. Mendelowitz +1
Gaussian aperture pupil masks (GAPMs) can in theory achieve the contrast requisite for directly imaging an extrasolar planet. We outline the process of fabricating and testing a GA…
High Contrast Imaging of Extrasolar Planets
John H. Debes, Jian Ge
Gaussian aperture pupil masks (GAPMs) can in theory achieve the contrast requisite for directly imaging an extrasolar planet. We use lab tests and simulations to further study thei…
Mesosphere Sodium Column Density and the Sodium Laser Guide Star Brightness
Jian Ge, J. R. P. Angel, B. D. Jacobsen +7
The first time simultaneous measurements of sodium column density and the absolute flux from a sodium laser guide star, created by a monochromatic 3 W cw laser, tuned to the peak o…
An Optical Ultrahigh Resolution Spectrograph for Use with Adaptive Optics
J. Ge, B. Jacobsen, J. R. P. Angel +5
A prototype ultrahigh resolution spectrograph has been built with an adaptive optics telescope. It provides resolving power, 300 Å wavelength coverage and 0.8\% efficienc…