Results 11 to 20 of about 22,843 (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

Reference-less detection, astrometry, and photometry of faint companions with adaptive optics [PDF]

, 2009
We propose a complete framework for the detection, astrometry, and photometry of faint companions from a sequence of adaptive optics corrected short exposures. The algorithms exploit the difference in statistics between the on-axis and off-axis intensity.
Beuzit, Biller, Born, Fitzgerald, Gladysz, Gladysz, Guyon, Hinkley, Itoh, Julian C. Christou, Labeyrie, Lafrenière, Marois, Marois, Masciadri, Roberts, Soummer, Soummer, Sparks, Szymon Gladysz   +19 more
core   +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

Resolving Stellar Populations outside the Local Group: MAD observations of UKS2323-326 [PDF]

, 2008
We present a study aimed at deriving constraints on star formation at intermediate ages from the evolved stellar populations in the dwarf irregular galaxy UKS2323-326.
A. Baruffolo, A. Moretti, Bouy, Buyle, C. Arcidiacono, Da Costa, E. Diolaiti, E. Marchetti, E. V. Held, Girardi, Gullieuszik, Gullieuszik, Holtzman, J. Farinato, J. Kolb, Jackson, Kaisin, Karachentsev, L. Greggio, Lee, M. Gullieuszik, M. Lombini, Marchetti, Menzies, Miller, P. Bagnara, R. Brast, R. Donaldson, R. Falomo, R. Ragazzoni, Ragazzoni, Ragazzoni, Ragazzoni, S. Tordo, Saviane, Schlegel, Skrutskie, Stetson, Totten, Valenti, Vernet-Viard   +40 more
core   +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 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., M. C. Britton, Tyler G., Tyler G., Veran J.   +4 more
core   +2 more sources

The InfraRed Imaging Spectrograph (IRIS) for TMT: photometric precision and ghost analysis [PDF]

, 2018
The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the Thirty Meter Telescope (TMT) that will be used to sample the corrected adaptive optics field by NFIRAOS with a near-infrared (0.8 - 2.4 $\mu$m) imaging camera and Integral Field
Chapin, Edward L., Chisholm, Eric, Do, Tuan, Dunn, Jennifer, Hayano, Yutaka, Johnson, Chris, Larkin, James E., Riddle, Reed L., Rundquist, Nils, Schoeck, Matthias, Sohn, Ji Man, Suzuki, Ryuji, Walth, Gregory, Wright, Shelley A.   +13 more
core   +3 more sources

TASS Mark IV Photometric Survey of the Northern Sky [PDF]

, 2006
The Amateur Sky Survey (TASS) is a loose confederation of amateur and professional astronomers. We describe the design and construction of our Mark IV systems, a set of wide-field telescopes with CCD cameras which take simultaneous images in the $V$ and $
Hog E., Maddox S. J., Manfroid J., Michael P. Sallman, Michael W. Richmond, Pojmanski G., Robert P. Creager, Thomas F. Droege   +7 more
core   +3 more sources

bRing: An observatory dedicated to monitoring the $\beta$ Pictoris b Hill sphere transit [PDF]

, 2017
Aims. We describe the design and first light observations from the $\beta$ Pictoris b Ring ("bRing") project. The primary goal is to detect photometric variability from the young star $\beta$ Pictoris due to circumplanetary material surrounding the ...
Bailey III, J. I., Crawford, S. M., Dorval, P., Ireland, M. J., Kenworthy, M. A., Laginja, I., Lomberg, B. B. D., Mamajek, E. E., Mellon, S. N., Stuik, R., Talens, G. J. J.   +10 more
core   +3 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   +1 more source