scholarly journals Focal plane instrumentation for the Wide-Field X-ray Telescope

2010 ◽  
Author(s):  
M. W. Bautz ◽  
R. F. Foster ◽  
S. S. Murray
Keyword(s):  
Focal Plane ◽  
Wide Field ◽  
X Ray

Matching A Curved Focal Plane With CCD's: Wide Field Imaging Of Glancing Incidence X-Ray Telescopes

1987 ◽  
Author(s):  
J . A. Nousek ◽  
G. P. Garmire ◽  
G. R. Ricker ◽  
M. w. Bautz ◽  
A. M. Levine ◽  
...  
Keyword(s):  
Focal Plane ◽  
Wide Field ◽  
X Ray ◽  
Field Imaging ◽  
Wide Field Imaging

Designing an x-ray baffle for stray-light reduction at the focal plane of the Wide Field Imager on board EDGE

2008 ◽  
Author(s):  
E. Perinati ◽  
T. Mineo ◽  
G. Cusumano ◽  
L. Piro ◽  
G. Pareschi ◽  
...  
Keyword(s):  
Focal Plane ◽  
Stray Light ◽  
Wide Field ◽  
X Ray ◽  
Light Reduction

Improvement of the Detection Sensitivity of Edxrf Trace Element Analysis by Means of Efficient X-Ray Focusing Based on Strongly Curved Hopg Crystals

1995 ◽  
Vol 39 ◽  
pp. 109-117
Author(s):  
Burkhard Beckhoff ◽  
Birgit Kanngießer
Keyword(s):  
High Intensity ◽  
Focal Plane ◽  
Bragg Reflection ◽  
Pyrolytic Graphite ◽  
Trace Element Analysis ◽  
Detection Sensitivity ◽  
Element Analysis ◽  
X Ray ◽  
Wide Range ◽  
Very High

X-ray focusing based on Bragg reflection at curved crystals allows collection of a large solid angle of incident radiation, monochromatization of this radiation, and condensation of the beam reflected at the crystal into a small spatial cross-section in a pre-selected focal plane. Thus, for the Bragg reflected radiation, one can achieve higher intensities than for the radiation passing directly to the same small area in the focal plane. In that case one can profit considerably from X-ray focusing in an EDXRF arrangement. The 00 2 reflection at Highly Oriented Pyrolytic Graphite (HOPG) crystals offers a very high intensity of the Bragg reflected beam for a wide range of photon energies. Furthermore, curvature radii smaller than 10 mm can be achieved for HOPG crystals ensuring efficient X-ray focusing in EDXRF applications. For the trace analysis of very small amounts of specimen material deposited on small areas of thin-filter backings, HOPG based X-ray focusing may be used to achieve a very high intensity of monochromatic excitation radiation.

scholarly journals A Multi-Frequency Study of the Milky Way-Like Spiral Galaxy NGC 6744

2018 ◽  
Vol 35 ◽  
Author(s):  
Miranda Yew ◽  
Miroslav D. Filipović ◽  
Quentin Roper ◽  
Jordan D. Collier ◽  
Evan J. Crawford ◽  
...  
Keyword(s):  
Black Hole ◽  
Milky Way ◽  
Formation Rate ◽  
Radio Continuum ◽  
Starburst Galaxy ◽  
Radio Sources ◽  
Wide Field ◽  
Central Black Hole ◽  
X Ray ◽  
Continuum Data

AbstractWe present a multi-frequency study of the intermediate spiral SAB(r)bc type galaxy NGC 6744, using available data from the Chandra X-Ray telescope, radio continuum data from the Australia Telescope Compact Array and Murchison Widefield Array, and Wide-field Infrared Survey Explorer infrared observations. We identify 117 X-ray sources and 280 radio sources. Of these, we find nine sources in common between the X-ray and radio catalogues, one of which is a faint central black hole with a bolometric radio luminosity similar to the Milky Way’s central black hole. We classify 5 objects as supernova remnant (SNR) candidates, 2 objects as likely SNRs, 17 as H ii regions, 1 source as an AGN; the remaining 255 radio sources are categorised as background objects and one X-ray source is classified as a foreground star. We find the star-formation rate (SFR) of NGC 6744 to be in the range 2.8–4.7 M⊙~yr − 1 signifying the galaxy is still actively forming stars. The specific SFR of NGC 6744 is greater than that of late-type spirals such as the Milky Way, but considerably less that that of a typical starburst galaxy.

scholarly journals The 3D structure of fibrous material is fully restorable from its X-ray diffraction pattern

IUCrJ ◽  
2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Hiroyuki Iwamoto
Keyword(s):  
Diffraction Pattern ◽  
Fibrous Material ◽  
3D Structure ◽  
Wide Field ◽  
Fibrous Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fiber Diffraction ◽  
Puzzle Solving ◽  
Diffraction Patterns

X-ray fiber diffraction is potentially a powerful technique to study the structure of fibrous materials, such as DNA and synthetic polymers. However, only rotationally averaged diffraction patterns can be recorded and it is difficult to correctly interpret them without the knowledge of esoteric diffraction theories. Here we demonstrate that, in principle, the non-rotationally averaged 3D structure of a fibrous material can be restored from its fiber diffraction pattern. The method is a simple puzzle-solving process and in ideal cases it does not require any prior knowledge about the structure, such as helical symmetry. We believe that the proposed method has a potential to transform the fiber diffraction to a 3D imaging technique, and will be useful for a wide field of life and materials sciences.

Wide-field imaging spectrometer for ESA's future x-ray mission: XEUS

1999 ◽  
Author(s):  
Lothar Strueder ◽  
Robert Hartmann ◽  
Peter Holl ◽  
Josef Kemmer ◽  
Peter Klein ◽  
...  
Keyword(s):  
Wide Field ◽  
Imaging Spectrometer ◽  
X Ray ◽  
Field Imaging ◽  
Wide Field Imaging

scholarly journals Ion transmission to the focal plane of the Chandra X-Ray Observatory

2000 ◽  
Author(s):  
Jeffery J. Kolodziejczak ◽  
Ronald F. Elsner ◽  
Robert A. Austin ◽  
Stephen L. O'Dell
Keyword(s):  
Focal Plane ◽  
X Ray ◽  
Ion Transmission

ASCA Observations of White Dwarfs, Neutron Stars and Black Holes

1996 ◽  
Vol 165 ◽  
pp. 321-331
Author(s):  
H. Inoue
Keyword(s):  
Black Holes ◽  
Focal Plane ◽  
Thin Foil ◽  
Effective Area ◽  
Wide Energy Range ◽  
Ccd Cameras ◽  
X Ray ◽  
Different Types ◽  
Wide Energy ◽  
Large Effective Area

ASCA, the fourth Japanese X-ray astronomy satellite, was launched by the Institute of Space and Astronautical Science (ISAS) on 1993 February 20. ASCA is designed to be a high-capability X-ray observatory (Tanaka et al. 1994). It is equipped with nested thin-foil mirrors which provide a large effective area over a wide energy range from 0.5 to 10 keV. Two different types of detectors, CCD cameras (SIS) and imaging gas scintillation proportional counters (GIS) are employed as the focal plane instruments.

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