Results 51 to 60 of about 476,629 (275)
Angular Photometry of Biological Tissue by Ellipsoidal Reflector Method
Приборы и методы измерений, 2019 Angular measurements in optics of biological tissues are used for different applied spectroscopic task for roughness surface control, define of refractive index and for research of optical properties.
M. A. Bezuglyi +3 more
doaj +1 more source
Optical and Infrared Photometry of the nearby SN 2017cbv [PDF]
The Astrophysical Journal, 2018 Abstract On 2017 March 11, the DLT40 Transient Discovery Survey discovered SN 2017cbv in NGC 5643, a Type 2 Seyfert Galaxy in the Lupus Constellation. SN 2017cbv went on to become a bright Type Ia supernova, with a V max of 11.51 ± 0.05 mag.
Jerrick Wee +3 more
openaire +3 more sources
The Anisoplanatic Point Spread Function in Adaptive Optics [PDF]
, 2006 The effects of anisoplanatism on the adaptive optics point spread function are investigated. A model is derived that combines observations of the guide star with an analytic formulation of anisoplanatism to generate predictions for the adaptive optics ...
Ellerbroek B. +4 more
core +2 more sources
Rest-Frame R-band Lightcurve of a z~1.3 Supernova Obtained with Keck Laser Adaptive Optics [PDF]
, 2007 We present Keck diffraction limited H-band photometry of a z~1.3 Type Ia supernova (SN) candidate, first identified in a Hubble Space Telescope (HST) search for SNe in massive high redshift galaxy clusters.
Aldering, G. +26 more
core +2 more sources
Optical Photometry of Black-Hole Candidates [PDF]
Symposium - International Astronomical Union, 1996 The orbital light curves of SXTs are discussed. In principle, the orbital inclination can be determined from the ellipsoidal variations, allowing a complete solution for the component masses. Complications in this analysis are described, and the evidence for superhumps in the light curves is reviewed.
openaire +2 more sources
A Sodium laser guide star coupling efficiency measurement method [PDF]
, 2016 Large telescope's adaptive optics (AO) system requires one or several bright artificial laser guide stars to improve its sky coverage. The recent advent of high power sodium laser is perfect for such application.
Bian, Qi +10 more
core +2 more sources
Array Polarimetry and Optical-Differencing Photometry [PDF]
Symposium - International Astronomical Union, 1995 Array detectors have improved the efficiency of optical polarimetry sufficiently for this technique to become part of the standard arsenal of observational facilities. However, we could gain even more: spatially-differentiating photometry can be implemented as an option of array Polarimeters and low-noise, high-frame-rate array detectors will allow ...
openaire +2 more sources
Energies, 2018 Energy saving in street lighting is garnering more interest and has become a priority in municipal management. Therefore, LED luminaires are gradually becoming prevalent in our cities.
Alfonso Gago-Calderón +3 more
doaj +1 more source
Paving the way to daytime optical feeder links based on LGS assisted adaptive optics
International Conference on Space Optics, 2021 We report on experiments performed with the Swedish Solar Telescope (SST) located in La Palma (Canary Islands) to observe the sodium Laser Guide Star (LGS) during daytime.
D. Alaluf +8 more
semanticscholar +1 more source
Optical Photometry of Flares and Flare Statistics [PDF]
International Astronomical Union Colloquium, 1983 This review discusses optical observations of flares and the results gleaned from these. Excellent reviews of flare activity have been published in the past and one might mention in particular Kunkel (1975), Gershberg (1978) and Gurzadyan (1980). In general these have been more broadly based than the present review incorporating other aspects of flare ...
openaire +2 more sources