Results 171 to 180 of about 290,655 (199)

Optical photometry using Bradford robotic telescope

Astrophysics and Space Science, 2009
The Bradford Robotic Telescope (BRT) is located on Mount Teide at Tenerife and is working, taking observations since 2003. It is a fully automated telescope. The hardware and software used for the working of the telescope are described here. Twenty four BL Lac objects are observed since 2005 and magnitudes of the objects are calculated.
P. Seal Braun, J. E. F. Baruch
openaire   +1 more source

Absorption photometry of patterned deposits on IMPROVE PTFE filters

Journal of the Air and Waste Management Association
The IMPROVE program (Interagency Monitoring of PROtected Visual Environments) tracks long-term trends in the composition and optics of regional haze aerosols in the United States. The absorptance of red (633-nm) light is monitored by filter photometry of
Warren H White   +10 more
semanticscholar   +1 more source

Optical photometry with the Kuiper Airborne Observatory

Publications of the Astronomical Society of the Pacific, 1983
The properties of optical photometric data obtainable with the 0.9-meter telescope of the Kuiper Airborne Observatory are described. The major differences between airborne and ground-based data are the absence of scintillation and the increased cosmic-ray background in the airborne data and the large size and vibration of the airborne images.
E. W. Dunham, J. L. Elliot
openaire   +1 more source

Determination of optical constants by photometry

Journal of Physics D: Applied Physics, 1983
A recent study of the accuracies of determining the optical constants of thin films, for film thicknesses up to 0.04 lambda , has been extended to include film thicknesses up to 0.25 lambda , and the results are reported. It is shown that the method may also be applied to bulk materials.
openaire   +1 more source

Optical Photometry of Quasar 0957+561A, B

The Astrophysical Journal, 1996
Observations of the gravitational lens system 0957+561A, B in the R band are presented in this Letter. The observations, taken with the 82 cm IAC-80 telescope, at Teide Observatory, Spain, were made from the beginning of 1996 February to June, as part of an on-going lens monitoring program to obtain the time delay between the two components of the ...
Alejandro Oscoz   +4 more
openaire   +1 more source

Multi-band optical photometry of geosynchronous satellites

Sensors and Systems for Space Applications XI, 2018
We present the results of multi band optical photometry (B, V, R and I) for 66% of the sample of geosynchronous satellites observable from Flagstaff, AZ. Observations were done while the targets were at solar phase angle smaller than ±5°, to probe the period when they are expected to reach maximum brightness.
openaire   +1 more source

Photometry, Radiometry, and Measurements of Optical Losses

2019
Preface: The revised 2nd edition of this practical book provides an expanded treatment and comparison of techniques used in advanced optical measurements, guiding its reader from fundamental radiometric and photometric concepts to the state-of-the-art in highly sensitive measurements of optical losses and in spectroscopic detection using coherent laser
openaire   +1 more source

Statistics of intensity in adaptive-optics images and their usefulness for detection and photometry of exoplanets.

Journal of The Optical Society of America A-optics Image Science and Vision, 2010
S. Gładysz, N. Yaitskova, J. Christou
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy