Results 41 to 50 of about 290,655 (199)

Fast CCD Photometry in the Taiwan-America Occultation Survey

Open 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., Zhang Z. W., King S. K., Alcock C., Byun Y. I., Cook K. H., Dave R., Giammarco J., Lee T., Lehner M., Liang C., Lissauer J., Marshall S., Pater I. de, Porrata R., Rice J., Wang A., Wang S. Y., Wen C. Y.   +18 more
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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, N. V. Bezuglaya, A. V. Ventsuryk, K. P. Vonsevych   +3 more
doaj   +1 more source

The photometry of optical instruments [PDF]

Transactions of the Optical Society, 1922
The use of a portable surface-brightness photometer of the polarisation type for the measurement of the fraction of the incident light transmitted by an optical instrument or reflected by a mirror or system of mirrors, and for the measurement of the relative brightness of different parts of the field of view of an optical instrument, is described.
openaire   +1 more source

Optical surface photometry of radio galaxies [PDF]

Astronomy and Astrophysics Supplement Series, 2000
Optical imaging observations for 50 radio galaxies are presented. For each object isophotal contours, photometric profiles, structural parameters (position angle, ellipticity, Fourier coefficients), and total magnitudes are given. These observations, obtained in the Cousins R band, complement the data presented in a previous paper and are part of a ...
Govoni, F., Falomo, R., Fasano, G., Scarpa, R.   +3 more
openaire   +2 more sources

Optical and Radio Surface Photometry of NGC 891 [PDF]

Symposium - International Astronomical Union, 1990
A general correlation between the radio and optical continuum surface brightness has been found in the edge-on galaxy NGC 891. This suggests that the relativistic electrons are produced/accelerated in the vicinity of evolved stars or stellar remnants which have a spatial distribution similar to old disk stars.
ALLEN, RJ, SUKUMAR, S, HU, FX, VANDERKRUIT, PC   +3 more
openaire   +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   +1 more source

LBT Italia: Current Achievements and Future Directions

Instruments
The Large Binocular Telescope (LBT) is a world-leading astronomical observatory, where the Italian partnership has played an important role in increasing the telescope’s productivity, both through an optimized observing strategy and through peer-reviewed
Silvia Tosi, Ester Marini, Felice Cusano, Andrea Rossi, Roberto Speziali, Roberta Carini   +5 more
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Evaluation of Uniformity and Glare Improvement with Low Energy Efficiency Losses in Street Lighting LED Luminaires Using Laser-Sintered Polyamide-Based Diffuse Covers

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, Manuel Jesús Hermoso-Orzáez, Jose Ramon De Andres-Diaz, Guillermo Redrado-Salvatierra   +3 more
doaj   +1 more source

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   +1 more source

MODERNIZATION OF AZT-22 TELESCOPE OF MAIDANAK HIGH-ALTITUDE OBSERVATORY: TESTING RESULTS

Radio Physics and Radio Astronomy, 2014
The AZT-22 telescope, equipped with the ML09000-65 CCD camera, has shown to be capable of obtaining high-quality images of astronomical objects and thus solving a wide range of observational tasks.
A. V. Sergeev, O. A. Burkhonov, V. N. Dudinov, A. P. Zheleznyak, Y. N. Krugly, I. E. Molotov, V. M. Shulga, S. A. Ehgamberdiev, V. V. Konichek, A. E. Kochetov   +9 more
doaj   +1 more source