scholarly journals Compton scattering for spectroscopic detection of ultra-fast, high flux, broad energy range X-rays

2013 ◽  
Vol 84 (11) ◽  
pp. 113302 ◽  
Author(s):  
S. Cipiccia ◽  
S. M. Wiggins ◽  
D. Maneuski ◽  
E. Brunetti ◽  
G. Vieux ◽  
...  
Keyword(s):  
Energy Range ◽  
Compton Scattering ◽  
High Flux ◽  
X Rays ◽  
Broad Energy Range ◽  
Broad Energy

scholarly journals Re-assessment of the Accretion Disc Clock in Hercules X-1

2010 ◽  
Vol 6 (S277) ◽  
pp. 325-328 ◽  
Author(s):  
E. Jurua ◽  
M. Still ◽  
P. J. Meintjes ◽  
P. A. Charles ◽  
S. K Anguma
Keyword(s):  
Neutron Star ◽  
Energy Range ◽  
Accretion Disc ◽  
X Rays ◽  
X Ray ◽  
Broad Energy Range ◽  
Sky Monitor ◽  
Broad Energy

AbstractThe Galactic neutron star X-ray binary Her X-1 shows a 35-day photometric modulation. Detected across a broad energy range, the modulation is prevalent in X-rays, cycling between low and high states. Since the discovery of the 35-day cycle of Her X-1, the X-ray source has entered and returned from an extended anomalous low state on at least seven occasions. Employing Rossi X-ray Timing Explorer All-Sky Monitor observations, prior predictions that Her X-1 would return from the 2003 - 2004 anomalous low state with a new precession period and accretion luminosity are verified. However, the precession has not been as coherent over recent years as predicted. Potentially there have been more minor anomalous low states between 2004 and the present day.

scholarly journals NSLS-II MX beamlines FMX for micro-crystallography & AMX for highly automated MX

2014 ◽  
Vol 70 (a1) ◽  
pp. C1733-C1733
Author(s):  
Martin Fuchs ◽  
Robert Sweet ◽  
Lonny Berman ◽  
Dileep Bhogadi ◽  
Wayne Hendrickson ◽  
...  
Keyword(s):  
Energy Range ◽  
Structure Determination ◽  
Optical Systems ◽  
Photon Flux ◽  
X Rays ◽  
Macromolecular Crystallography ◽  
Binding Studies ◽  
X Ray ◽  
Array Detectors ◽  
Broad Energy Range

We present the final design of the x-ray optical systems and experimental stations of the two macromolecular crystallography (MX) beamlines, FMX and AMX, at the National Synchrotron Light Source-II (NSLS-II). Along with its companion x-ray scattering beamline, LIX, this suite of Advanced Beamlines for Biological Investigations with X-rays (ABBIX, [1]) will begin user operation in 2016. The pair of MX beamlines with complementary and overlapping capabilities is located at canted undulators (IVU21) in sector 17-ID. The Frontier Microfocusing Macromolecular Crystallography beamline (FMX) will deliver a photon flux of ~5x10^12 ph/s at a wavelength of 1 Å into a spot of 1 - 50 µm size. It will cover a broad energy range from 5 - 30 keV, corresponding to wavelengths from 0.4 - 2.5 Å. The highly Automated Macromolecular Crystallography beamline (AMX) will be optimized for high throughput applications, with beam sizes from 4 - 100 µm, an energy range of 5 - 18 keV (0.7 - 2.5 Å), and a flux at 1 Å of ~10^13 ph/s. Central components of the in-house-developed experimental stations are a 100 nm sphere of confusion goniometer with a horizontal axis, piezo-slits to provide dynamic beam size changes during diffraction experiments, a dedicated secondary goniometer for crystallization plates, and sample- and plate-changing robots. FMX and AMX will support a broad range of biomedical structure determination methods from serial crystallography on micron-sized crystals, to structure determination of complexes in large unit cells, to rapid sample screening and data collection of crystals in trays, for instance to characterize membrane protein crystals and to conduct ligand-binding studies. Together with the solution scattering program at LIX, the new beamlines will offer unique opportunities for advanced diffraction experiments with micro- and mini-beams, with next generation hybrid pixel array detectors and emerging crystal delivery methods such as acoustic droplet ejection. This work is supported by the US National Institutes of Health.

scholarly journals Compton-Thick AGN in the NuSTAR ERA VII. A joint NuSTAR, Chandra, and XMM-Newton Analysis of Two Nearby, Heavily Obscured Sources

2021 ◽  
Vol 922 (2) ◽  
pp. 159
Author(s):  
A. Traina ◽  
S. Marchesi ◽  
C. Vignali ◽  
N. Torres-Albà ◽  
M. Ajello ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Energy Range ◽  
Active Galactic Nuclei ◽  
Column Density ◽  
Galactic Nuclei ◽  
Seyfert Galaxies ◽  
Line Of Sight ◽  
Broad Energy Range ◽  
Larger Sample ◽  
Broad Energy

Abstract We present the joint Chandra, XMM-Newton, and NuSTAR analysis of two nearby Seyfert galaxies, NGC 3081 and ESO 565-G019. These are the only two having Chandra data in a larger sample of 10 low-redshift (z ≤ 0.05), candidates Compton-thick (CT) Active Galactic Nuclei selected in the 15–150 keV band with Swift-BAT that were still lacking NuSTAR data. Our spectral analysis, performed using physically motivated models, provides an estimate of both the line-of-sight (l.o.s.) and average (N H,S ) column densities of the two torii. NGC 3081 has a Compton-thin l.o.s. column density N H,z = [0.58–0.62] × 1024 cm−2, but the N H,S , beyond the CT threshold (N H,S = [1.41–1.78] × 1024 cm−2), suggests a “patchy” scenario for the distribution of the circumnuclear matter. ESO 565-G019 has both CT l.o.s. and N H,S column densities (N H,z > 2.31 × 1024 cm−2 and N H,S > 2.57 × 1024 cm−2, respectively). The use of physically motivated models, coupled with the broad energy range covered by the data (0.6–70 keV and 0.6–40 keV, for NGC 3081 and ESO 565-G019, respectively) allows us to constrain the covering factor of the obscuring material, which is C TOR = [0.63–0.82] for NGC 3081, and C TOR = [0.39–0.65] for ESO 565-G019.

scholarly journals Integral Cross Sections for Electron–Magnesium Scattering Over a Broad Energy Range (0–5000 eV)

2018 ◽  
Vol 47 (4) ◽  
pp. 043104 ◽  
Author(s):  
R. P. McEachran ◽  
F. Blanco ◽  
G. García ◽  
P. W. Stokes ◽  
R. D. White ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Broad Energy Range ◽  
Broad Energy

scholarly journals Theoretical study on positron scattering by benzene over a broad energy range

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Alessandra Souza Barbosa ◽  
Francisco Blanco ◽  
Gustavo García ◽  
M. H. F. Bettega
Keyword(s):  
Energy Range ◽  
Theoretical Study ◽  
Positron Scattering ◽  
Broad Energy Range ◽  
Broad Energy

Neutron spectrum over broad energy range in critical pile

1978 ◽  
Vol 44 (3) ◽  
pp. 294-296
Author(s):  
M. Ya. Bankrashkova ◽  
V. N. Bogomolov ◽  
V. S. Gal'tsov ◽  
V. N. Gurin ◽  
V. S. Dmitrieva ◽  
...  
Keyword(s):  
Energy Range ◽  
Neutron Spectrum ◽  
Broad Energy Range ◽  
Broad Energy

scholarly journals Cross sections for electron scattering from thiophene for a broad energy range

2018 ◽  
Vol 149 (3) ◽  
pp. 034304 ◽  
Author(s):  
Alexandra Loupas ◽  
Ana. I. Lozano ◽  
Francisco Blanco ◽  
Jimena D. Gorfinkiel ◽  
Gustavo García
Keyword(s):  
Energy Range ◽  
Electron Scattering ◽  
Cross Sections ◽  
Broad Energy Range ◽  
Broad Energy
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