Results 1 to 10 of about 304,058 (104)

Stellar photometry with multi conjugate adaptive optics [PDF]

open access: yesSPIE Proceedings, 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   +16 more
semanticscholar   +5 more sources

Quantifying the Contamination from nearby Stellar Companions in Gaia DR3 Photometry [PDF]

open access: yesThe Astronomical Journal
Identifying and removing binary stars from stellar samples is a crucial but complicated task. Regardless of how carefully a sample is selected, some binaries will remain and complicate interpretation of results, especially via flux contamination of ...
Kendall Sullivan   +3 more
doaj   +2 more sources

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.
Forrest Gasdia   +2 more
doaj   +2 more sources

OGLE-2016-BLG-1195Lb: A Sub-Neptune Beyond the Snow Line of an M-dwarf Confirmed by Keck Adaptive Optics

open access: yesThe Astronomical Journal, 2023
We present the analysis of high-resolution follow-up observations of OGLE-2016-BLG-1195 using Laser Guide Star Adaptive Optics with Keck, seven years after the event’s peak.
Aikaterini Vandorou   +20 more
doaj   +2 more sources

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

open access: yesThe 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   +9 more
doaj   +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
doaj   +4 more sources

FORECASTOR. I. Finding Optics Requirements and Exposure Times for the Cosmological Advanced Survey Telescope for Optical and UV Research Mission [PDF]

open access: yesThe Astronomical Journal
The Cosmological Advanced Survey Telescope for Optical and ultraviolet Research (CASTOR) is a proposed Canadian-led 1 m class space telescope that will carry out ultraviolet and blue optical wide-field imaging, spectroscopy, and photometry.
Isaac Cheng   +23 more
doaj   +2 more sources

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

open access: yesPLoS 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   +5 more
doaj   +7 more sources

Ex vivo liquid core fiber photometry with high-resolution 3D printing

open access: yesSensors and Actuators Reports
High resolution 3D printing emerges as an alternative to microfabrication due to its fine resolution along with one-step manufacturing. Thus, it is broadly used in many fields, such as biological and chemical applications.
Yu Chang, Can Wang, Ke Du
doaj   +2 more sources

The sharpest view on the high-mass star-forming region S255IR. Near infrared adaptive optics imaging of the outbursting source NIRS3 [PDF]

open access: yesAstronomy & Astrophysics, 2023
Massive stars have an impact on their surroundings from early in their formation until the end of their lives. However, very little is known about their formation.
R. Fedriani   +8 more
semanticscholar   +1 more source

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