Results 11 to 20 of about 1,427 (189)

Multi-Site Simultaneous Time-Resolved Photometry with a Low Cost Electro-Optics System [PDF]

Sensors, 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, Aroh Barjatya, Sergei Bilardi   +2 more
doaj   +2 more sources

Detection of extrasolar planet WASP-10b by differential photometry using amateur optics

Defense and Security Studies
This study presents the detection and characterization of the exoplanet WASP-10b using differential photometry performed with amateur astronomical equipment.
Alan Catovic, Dzan Jasarevic
doaj   +2 more sources

First time-series optical photometry from Antarctica [PDF]

Astronomy & 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., Briguglio, R., Granzer, T., Tosti, G., DiVarano, I., Savanov, I., Bagaglia, M., Castellini, S., Mancini, A., Nucciarelli, G., Straniero, O., Distefano, E., Messina, S., Cutispoto, G.   +13 more
openaire   +3 more sources

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

Приборы 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, A. A. Haponiuk, D. V. Bondariev, S. A. Poluectov, V. A. Chornyi, M. A. Bezuglyi   +5 more
doaj   +1 more source

Stellar Photometry with the Optical Monitors [PDF]

International 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]

The Astronomical Journal, 2003
21 pages with five figures. Uses AASTEX 5.02. To appear in AJ.
Holland, S.T., Weidinger, M., Fynbo, J.P.U., Gorosabel, J., Hjorth, J., Pedersen, K., Méndez Alvarez, J., Augusteijn, T., Castro Cerón, J.M., Castro-Tirado, A., Dahle, H., Egholm, M.P., Jakobsson, P., Jensen, B.L., Levan, A., Moeller, P., Pedersen, H., Pursimo, T., Ruiz-Lapuente, P., Thomsen, B.   +19 more
openaire   +3 more sources

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
doaj   +1 more source

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