Results 1 to 10 of about 2,057 (139)

Multi-Site Simultaneous Time-Resolved Photometry with a Low Cost Electro-Optics System

open access: yesSensors, 2017
Sunlight reflected off of resident space objects can be used as an optical signal for astrometric orbit determination and for deducing geometric information about the object.
Aroh Barjatya
exaly   +5 more sources

Recent results and perspectives for precision astrometry and photometry with adaptive optics [PDF]

open access: yesProceedings of SPIE, 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
Jessica R Lu, Andrea M Ghez, Tuan Do
exaly   +2 more sources

Fast CCD Photometry in the Taiwan-America Occultation Survey

open access: yesOpen Astronomy, 2003
We describe the efforts of the Taiwan-America Occultation Survey (TAOS) project to develop a data acquisition and analysis scheme for fast CCD imaging photometry.
Chen W. P.   +18 more
doaj   +3 more sources

Stellar photometry with multi conjugate adaptive optics

open access: yesProceedings of SPIE, 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.
G Fiorentino   +2 more
exaly   +2 more sources

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

open access: yesJournal 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
exaly   +4 more sources

National Ignition Facility small optics laser-induced damage and photometry measurements program [PDF]

open access: yes, 1999
The National Ignition Facility will require upwards of 25,000 small optical components in its various beam conditioning and diagnostic packages. A quality control program designed to ensure that the elements meet the required specifications will test ...
Sheehan, L   +3 more
exaly   +1 more source

Accurate photometry with adaptive optics in the presence of anisoplanatic effects with a sparsely sampled PSF

open access: yesAstronomy and Astrophysics, 2010
Context. Anisoplanatic effects can cause significant systematic photometric uncertainty in the analysis of dense stellar fields observed with adaptive optics.
R Schödel
exaly   +2 more sources

REFERENCE-LESS DETECTION, ASTROMETRY, AND PHOTOMETRY OF FAINT COMPANIONS WITH ADAPTIVE OPTICS

open access: yesAstrophysical Journal, 2009
We propose a complete framework for the detection, astrometry, and photometry of faint companions from a sequence of adaptive optics (AO) corrected short exposures.
Szymon Gladysz, Julian C Christou
exaly   +2 more sources

Fast Inline Microscopic Computational Imaging

open access: yesSensors, 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   +2 more
doaj   +1 more source

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

open access: yesThe 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   +22 more
doaj   +1 more source

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