Results 31 to 40 of about 695,204 (139)

First result with AMBER+FINITO on the VLTI: The high-precision angular diameter of V3879 Sgr

, 2008
Our goal is to demonstrate the potential of the interferometric AMBER instrument linked with the Very Large Telescope Interferometer (VLTI) fringe-tracking facility FINITO to derive high-precision stellar diameters.
B. Bauvir, F. Rantakyrö, Gai, J.-B. Le Bouquin, M. Schöller, P. Haguenauer, Petrov, Richichi, Richichi, S. Menardi, Tatulli   +10 more
core   +2 more sources

Instrument quickly transposes ground reference target to eye level [PDF]

, 1966
Optical alignment of equipment is facilitated by a traverse target with a string suspending a plumb bob to transpose the ground level point to eye level operation.
Green, B. E., Van Deventer, E. L.
core   +1 more source

Astrometry and photometry with HST-WFC3. I. Geometric distortion corrections of F225W, F275W, F336W bands of the UVIS-channel

, 2009
An accurate geometric distortion solution for the Hubble Space Telescope UVIS-channel of Wide Field Camera 3 is the first step towards its use for high precision astrometry.
Bedin, L. R., Bellini, A.
core   +1 more source

Measuring Stellar Radial Velocities with a Dispersed Fixed-Delay Interferometer

, 2008
We demonstrate the ability to measure precise stellar barycentric radial velocities with the dispersed fixed-delay interferometer technique using the Exoplanet Tracker (ET), an instrument primarily designed for precision differential Doppler velocity ...
Andrew Vanden Heuvel, Curtis DeWitt, Dravins D., Gorskii S. M., Helmi A., Jian Ge, Julian van Eyken, Justin Crepp, Kozhevatov I. E., Roger Cohen, Scott W. Fleming, Suvrath Mahadevan, Weinberg D. H.   +12 more
core   +1 more source

CAFE: Calar Alto Fiber-fed Echelle spectrograph

, 2013
We present here CAFE, the Calar Alto Fiber-fed Echelle spectrograph, a new instrument built at the Centro Astronomico Hispano Alem\'an (CAHA). CAFE is a single fiber, high-resolution ($R\sim$70000) spectrograph, covering the wavelength range between 3650-
Aceituno, J., Barrado, D., Bean, J., Benitez, D., Dreizler, S., Grupp, F., Hernan-Obispo, M., Lillo, J., Montoya, L. M., Pedraz, S., Sanchez, S. F., Thiele, U.   +11 more
core   +1 more source

Characterization of a turbomolecular-pumped magnetic sector mass spectrometer [PDF]

A Perkin Elmer MGA-1200, turbomolecular-pumped, magnetic sector, multiple gas analyzer mass spectrometer with modified inlet for fast response was characterized for the analysis of hydrogen, helium, oxygen and argon in nitrogen and helium background ...
Mehta, Narinder K.
core   +1 more source

Geodetic measurements at sea floor spreading centers [PDF]

A network of 8 or more precision transponder units mounted on the sea floor and interrogated periodically from an instrument package towed near bottom through the area to provide the necessary spatial averaging could provide a practical system for ...
Spiess, F. N.
core   +1 more source

Zonal Winds Between 25 and 120 Km Retrieved from Solar Occultation Spectra [PDF]

Atmospheric winds at heights between 25 and 120 km have been retrieved with precisions of 5/ms from the Doppler shifts of atmospheric absorption lines measured from a satellite-borne instrument.
Shaw, John H., Vancleef, Garrett Warren
core   +1 more source

Improving precision instrument cleaning with a quality control module: implementation and outcomes. [PDF]

Front Public Health
Xiong J, Jiang W, Wan W, Zuo L, Tu P, Rao DX.   +5 more
europepmc   +1 more source

Toward a documentary standard for performance testing of terrestrial laser scanners used in forensic practice: A statistical procedure to assess change in instrument precision. [PDF]

J Forensic Sci
Gregg M, Muralikrishnan B, Shilling M.
europepmc   +1 more source