On understanding the figures of merit for detection and measurement of x-ray polarization
On-chip spectro-detection for fully integrated coherent beam combiners
On-Sky Demonstration of a Linear Band-limited Mask with Application to Visual Binary Stars
On-sky multi-wavelength phasing of segmented telescopes with the Zernike phase contrast sensor
Online Gamma-Ray Burst catalog for neutrino telescopes
Opendda: a Novel High-Performance Computational Framework for the Discrete Dipole Approximation
Operations of and Future Plans for the Pierre Auger Observatory
Opportunities for Nuclear Astrophysics at FRANZ
Optical analysis of spherical mirrors of telescopes: the lens-less Schmidt case
Optical atmospheric extinction over Cerro Paranal
Optical constants of silicon carbide for astrophysical applications. II. Extending optical functions from IR to UV using single-crystal absorption spectra
Optical instability of the earth's atmosphere
Optical Intensity Interferometry with the Cherenkov Telescope Array
Optical NEP in Hot-Electron Nanobolometers
Optical performance of the JWST MIRI flight model: characterization of the point spread function at high-resolution
Optical properties of cosmic dust analogs: A review
Optical Spectroscopy with the Technology of Virtual Observatory
Optical Synoptic Telescopes: New Science Frontiers
Optical Turbulence above the Internal Antarctic Plateau
Optical turbulence forecast: toward a new era of ground-based astronomy