Results 31 to 40 of about 290,655 (199)

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

open access: yesRemote 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   +6 more
doaj   +1 more source

Comparative study of autofluorescence in flat and tapered optical fibers towards application in depth-resolved fluorescence lifetime photometry in brain tissue.

open access: yesBiomedical Optics Express, 2021
As the scientific community seeks efficient optical neural interfaces with sub-cortical structures of the mouse brain, a wide set of technologies and methods is being developed to monitor cellular events through fluorescence signals generated by ...
Marco Bianco   +9 more
semanticscholar   +1 more source

Optical and Infrared Photometry of SN 2005df* [PDF]

open access: yesResearch Notes of the AAS, 2017
12 pages, 3 figures, to be published in Research Notes of the ...
Kevin Krisciunas   +5 more
openaire   +2 more sources

Accurate Photometry of Saturated Stars Using the Point-spread-function Wing Technique with Spitzer [PDF]

open access: yesAstronomical Journal, 2021
We report Spitzer 3.6 and 4.5 μm photometry of 11 bright stars relative to Sirius, exploiting the unique optical stability of the Spitzer Space Telescope point-spread function (PSF).
K. Su, G. Rieke, M. Marengo, E. Schlawin
semanticscholar   +1 more source

MACHO Proper Motions from Optical/Infrared Photometry [PDF]

open access: yesThe Astrophysical Journal, 1996
15 pages, uuencoded postscript, includes 3 figures.
Gould, Andrew, Welch, Douglas L.
openaire   +2 more sources

High-contrast and resolution near-infrared photometry of the core of R136 [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2021
We present the sharpest and deepest near-infrared photometric analysis of the core of R136, a newly formed massive star cluster at the centre of the 30 Doradus star-forming region in the Large Magellanic Cloud.
Z. Khorrami   +10 more
semanticscholar   +1 more source

First time-series optical photometry from Antarctica [PDF]

open access: yesAstronomy & Astrophysics, 2008
Beating the Earth's day-night cycle is mandatory for long and continuous time-series photometry and had been achieved with either large ground-based networks of observatories at different geographic longitudes or when conducted from space. A third possibility is offered by a polar location with astronomically-qualified site characteristics. Aims.
Strassmeier, K. G.   +13 more
openaire   +3 more sources

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

open access: yesПриборы 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   +5 more
doaj   +1 more source

Stellar Photometry with the Optical Monitors [PDF]

open access: yesInternational Astronomical Union Colloquium, 1993
AbstractThe Optical Monitors are small optical telescopes which will fly on board of the X-ray satellites SPECTRUM-X-GAMMA (JET-X experiment) and XMM. Their main scientific applications are the simultaneous observations (imaging) in the optical and UV band of the optical counterparts of X-ray sources, with limiting magnitudes of aboutmv=22(JET-X) and ...
E. Antonello, M. Cropper
openaire   +1 more source

Optical Photometry of GRB 021004: The First Month [PDF]

open access: yesThe Astronomical Journal, 2003
21 pages with five figures. Uses AASTEX 5.02. To appear in AJ.
Holland, S.T.   +19 more
openaire   +3 more sources

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