scholarly journals Time Resolved Optical Spectroscopy of V795 Her

1996 ◽  
Vol 158 ◽  
pp. 41-42
Author(s):  
R. J. Dickinson ◽  
R. K. Prinja ◽  
S. R. Rosen ◽  
K. Horne
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Optical Spectroscopy ◽  
Emission Feature ◽  
Cataclysmic Variable ◽  
Two Dimensional ◽  
S Wave ◽  
Time Resolved ◽  
Two Dimensional Image ◽  
Dependent Behaviour

AbstractWe present high resolution optical spectroscopy of the cataclysmic variable (CV) V795 Her. The time- and phase- dependent behaviour of the emission source is examined using two-dimensional image analysis and Doppler reconstruction techniques on the orbital profiles. A clear S-wave modulation of a weak emission feature in the Hβ and Hγ line wings (extending to ~1800 km s−1) is present, with complex asymmetric properties.

scholarly journals Time-Resolved Optical Spectroscopy of V795 Herculis

1997 ◽  
Vol 163 ◽  
pp. 697-698
Author(s):  
Rachel J. Dickinson ◽  
Raman K. Prinja ◽  
Simon R. Rosen ◽  
Andrew R. King ◽  
Coel Hellier ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Spectroscopy ◽  
Orbital Period ◽  
High Velocity ◽  
Time Resolved ◽  
Velocity Fluctuations ◽  
Complex Time ◽  
Balmer Lines ◽  
Dependent Behaviour

AbstractHigh resolution optical spectroscopy of V795 Herculis shows complex time- and phase-dependent behaviour of the disk emission. Separate low- and high-velocity fluctuations phased on the 2.6 hr orbital period are observed in the wings of the Balmer lines, prompting a gas stream overflow model.

scholarly journals High-Resolution Two-Dimensional Optical Spectroscopy of Electron Spins

2017 ◽  
Vol 7 (3) ◽  
Author(s):  
M. Salewski ◽  
S. V. Poltavtsev ◽  
I. A. Yugova ◽  
G. Karczewski ◽  
M. Wiater ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Spectroscopy ◽  
Two Dimensional ◽  
Electron Spins

Combining a nine-crystal multi-analyser stage with a two-dimensional detector for high-resolution powder X-ray diffraction

2018 ◽  
Vol 51 (6) ◽  
pp. 1721-1733 ◽  
Author(s):  
Catherine Dejoie ◽  
Mauro Coduri ◽  
Sébastien Petitdemange ◽  
Carlotta Giacobbe ◽  
Ezio Covacci ◽  
...  
Keyword(s):  
High Resolution ◽  
Powder Diffraction ◽  
High Efficiency ◽  
Photon Counting ◽  
High Angular Resolution ◽  
Two Dimensional ◽  
Pixel Detector ◽  
Two Dimensional Image ◽  
Area Detector ◽  
Overall Performance

The high-resolution powder diffraction beamline at ESRF (ID22), built with a dual-undulator source on the 6 GeV storage ring, combines a wide continuous range of incident energy (6–80 keV) with high brightness, offering the possibility to carry out high-flux high-resolution powder diffraction measurements. In routine operation, a bank of nine scintillation detectors is scanned vertically to measure the diffracted intensity versus 2θ, each detector being preceded by an Si 111 analyser crystal. Although the current detector system has operated successfully for the past 20 years, recent developments in detector technology could be exploited to improve the overall performance. With this in mind, as a test, a two-dimensional Pilatus3 X CdTe 300 K-W pixel detector has been mounted on the arm of the diffractometer, replacing the nine scintillator detectors. At each nominal 2θ value, a two-dimensional image is recorded showing nine distinct regions corresponding to the diffraction signals passing via each of the analyser crystals. This arrangement offers new flexibility in terms of data handling and processing, with the possibility to optimize both peak shape and statistics, to remove parasitic effects, and to gain spatial resolution information. Combining the high efficiency of a hybrid photon-counting area detector with the high angular resolution given by analyser crystals is an effective approach to improving the overall performance of high-resolution powder diffraction.

Two-dimensional image analysis of the shape of rice and its application to separating varieties

1996 ◽  
Vol 27 (4) ◽  
pp. 397-407 ◽  
Author(s):  
N. Sakai ◽  
S. Yonekawa ◽  
A. Matsuzaki ◽  
H. Morishima
Keyword(s):  
Image Analysis ◽  
Two Dimensional ◽  
Dimensional Image ◽  
Two Dimensional Image
Sign in / Sign up

Export Citation Format

Share Document