Charles F. Lillie
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View article: Great Observatories: The Past and Future of Panchromatic Astrophysics
Great Observatories: The Past and Future of Panchromatic Astrophysics Open
NASA's Great Observatories have opened up the electromagnetic spectrum from space, providing sustained access to wavelengths not accessible from the ground. Together, Hubble, Compton, Chandra, and Spitzer have provided the scientific commu…
View article: Topological pupil segmentation and point spread function analysis for large aperture imaging systems
Topological pupil segmentation and point spread function analysis for large aperture imaging systems Open
Future large aperture telescopes and high contrast imaging systems will often include segment gaps, structural obscurations, along with outer edges which produce diffraction effects that are disadvantageous to high contrast imaging (e.g., …
View article: The Case for Probe-class NASA Astrophysics Missions
The Case for Probe-class NASA Astrophysics Missions Open
Astrophysics spans an enormous range of questions on scales from individual planets to the entire cosmos. To address the richness of 21st century astrophysics requires a corresponding richness of telescopes spanning all bands and all messe…
View article: Stealth telescopes for space and ground astronomy
Stealth telescopes for space and ground astronomy Open
In this paper we examine several contrast-degrading static signature sources present in current terrestrial exoplanet Lyot Coronagraph/Telescope optical systems. These are: Unnecessary optical surfaces, which increase cost, absorption, sca…
View article: The Legacy of the Great Observatories: Panchromatic Coverage as a Strategic Goal for NASA Astrophysics
The Legacy of the Great Observatories: Panchromatic Coverage as a Strategic Goal for NASA Astrophysics Open
Multi-wavelength observations are crucial for understanding astrophysical phenomena and have fueled rapid progress. To maintain continued access to wavelength regimes that are either inaccessible or compromised from the ground, we recommen…
View article: The Case for Probe-class NASA Astrophysics Missions
The Case for Probe-class NASA Astrophysics Missions Open
Astrophysics spans an enormous range of questions on scales from individual planets to the entire cosmos. To address the richness of 21st century astrophysics requires a corresponding richness of telescopes spanning all bands and all messe…
View article: An evolvable space telescope configured for NASA's Habex mission: the initial stage of LUVOIR
An evolvable space telescope configured for NASA's Habex mission: the initial stage of LUVOIR Open
Previous papers have described our concept for a large telescope that would be assembled in space in several stages (in different configurations) over a period of fifteen to 20 years. Spreading the telescope development, launch and operati…
View article: Finding the UV–Visible Path Forward: Proceedings of the Community Workshop to Plan the Future of UV/Visible Space Astrophysics
Finding the UV–Visible Path Forward: Proceedings of the Community Workshop to Plan the Future of UV/Visible Space Astrophysics Open
We present the science cases and technological discussions that came from the\nworkshop entitled "Finding the UV-Visible Path Forward" held at NASA GSFC June\n25-26, 2015. The material presented outlines the compelling science that can be\…
View article: Prime focus architectures for large space telescopes: reduce surfaces to save cost
Prime focus architectures for large space telescopes: reduce surfaces to save cost Open
Conceptual architectures are now being developed to identify future directions for post JWST large space telescope systems to operate in the UV Optical and near IR regions of the spectrum. Here we show that the cost of optical surfaces wit…