Results 1 to 10 of about 22,843 (189)

Stellar photometry with Multi Conjugate Adaptive Optics [PDF]

, 2016
We overview the current status of photometric analyses of images collected with Multi Conjugate Adaptive Optics (MCAO) at 8-10m class telescopes that operated, or are operating, on sky.
Andersen, David, Bellazzini, Michele, Bono, Giuseppe, Ciliegi, Paolo, Diolaiti, Emiliano, Ferraro, Ivan, Fiorentino, Giuliana, Iannicola, Giacinto, Massari, Davide, McConnachie, Alan, Monelli, Matteo, Schreiber, Laura, Stetson, Peter B., Testa, Vincenzo, Tolstoy, Eline, Turri, Paolo, Veran, Jean-Pierre   +16 more
core   +7 more sources

Influence of Mie scattering on nanoparticles with different particle sizes and shapes: photometry and analytical ultracentrifugation with absorption optics [PDF]

Journal of the Serbian Chemical Society, 2005
Nanoparticles are used in large quantities for very different applications. A precise determination of the diameter and the particle size distribution which is responsible for the application properties is therefore essential.
M. D. LECHNER
doaj   +5 more sources

Recent Results and Perspectives for Precision Astrometry and Photometry with Adaptive Optics [PDF]

, 2010
Large ground-based telescopes equipped with adaptive optics (AO) systems have ushered in a new era of high-resolution infrared photometry and astrometry. Relative astrometric accuracies of
Clarkson, Will, Do, Tuan, Ghez, Andrea M., Lu, Jessica R., McCrady, Nate, Morris, Mark R., Yelda, Sylvana   +6 more
core   +4 more sources

Fast Inline Microscopic Computational Imaging

Sensors, 2022
Inline inspection is becoming an essential tool for industrial high-quality production. Unfortunately, the desired acquisition speeds and needs for high-precision imaging are often at the limit of what is physically possible, such as a large field of ...
Laurin Ginner, Simon Breuss, Lukas Traxler   +2 more
doaj   +1 more source

JWST Observations of the Enigmatic Y-Dwarf WISE 1828+2650. I. Limits to a Binary Companion

The Astrophysical Journal, 2023
The Y-dwarf WISE 1828+2650 is one of the coldest known brown dwarfs with an effective temperature of ∼300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of ∼5–10 M _J , making it a valuable ...
Matthew De Furio, Ben Lew, Charles Beichman, Thomas Roellig, Geoffrey Bryden, David Ciardi, Michael Meyer, Marcia Rieke, Alexandra Greenbaum, Jarron Leisenring, Jorge Llop-Sayson, Marie Ygouf, Loic Albert, Martha Boyer, Daniel Eisenstein, Klaus Hodapp, Scott Horner, Doug Johnstone, Doug Kelly, Karl Misselt, George Rieke, John Stansberry, Erick Young   +22 more
doaj   +1 more source

Modeling and Analysis of an Echo Laser Pulse Waveform for the Orientation Determination of Space Debris

Remote Sensing, 2020
Orientation information of space debris is required to improve the orbital prediction accuracy for mitigation or elimination of a significant threat to not only human space activities but also operational satellites.
Hyung-Chul Lim, Zhong-Ping Zhang, Ki-Pyoung Sung, Jong Uk Park, Simon Kim, Chul-Sung Choi, Mansoo Choi   +6 more
doaj   +1 more source

Macular pigment optical density measured by heterochromatic modulation photometry. [PDF]

PLoS ONE, 2014
PURPOSE:To psychophysically determine macular pigment optical density (MPOD) employing the heterochromatic modulation photometry (HMP) paradigm by estimating 460 nm absorption at central and peripheral retinal locations. METHODS:For the HMP measurements,
Cord Huchzermeyer, Juliane Schlomberg, Ulrich Welge-Lüssen, Tos T J M Berendschot, Joel Pokorny, Jan Kremers   +5 more
doaj   +1 more source

DDO68 C: The Actual Appearance of a Ghost Satellite Dwarf through Adaptive Optics at the Large Binocular Telescope

The Astrophysical Journal Letters, 2023
Through adaptive optics (AO) imaging with the SOUL+LUCI instrument at the Large Binocular Telescope we were able to resolve, for the first time, individual stars in the gas-rich galaxy DDO68 C. This system was already suggested to be interacting with the
Francesca Annibali, Enrico Pinna, Leslie K. Hunt, Diego Paris, Felice Cusano, Michele Bellazzini, John M. Cannon, Raffaele Pascale, Monica Tosi, Fabio Rossi   +9 more
doaj   +1 more source

Characterization of the near-Earth Asteroid 2002NY40 [PDF]

, 2007
In August 2002, the near-Earth asteroid 2002 NY40, made its closest approach to the Earth. This provided an opportunity to study a near-Earth asteroid with a variety of instruments.
Ayers, Baliunas, Benner, Binzel, Bowell, Bradley, Dennis Liang, Doyle T. Hall, Drummond, Fish, Gerwe, Hestroffer, Howell, Hudson, Jacob K. Barros, John L. Africano, John V. Lambert, Jorgensen, Keith T. Knox, Kris M. Hamada, Lewis C. Roberts, Lipschutz, Lucy, McCarthy, Müller, Nishimoto, Paul F. Sydney, Paul W. Kervin, Paxman, Pravec, Ragazzoni, Richardson, Rivkin, Roberts, Saint-Pe, Stetson, Sydney, Tsumuraya   +37 more
core   +1 more source

Rationale for the Choice of the Ellipsoidal Reflector Parameters for Biomedical Photometers

Приборы и методы измерений, 2021
Biomedical photometersʼ information-measuring systems with ellipsoidal reflectors have acceptable results in determining of biological tissues optical properties in the visible and near-infrared spectral range. These photometers make it possible to study
N. V. Bezuglaya, A. A. Haponiuk, D. V. Bondariev, S. A. Poluectov, V. A. Chornyi, M. A. Bezuglyi   +5 more
doaj   +1 more source