Bimodal X-ray and Infrared Imaging of an Organometallic Derivative of Praziquantel inSchistosoma mansoni

ChemBioChem ◽  
2016 ◽  
Vol 17 (11) ◽  
pp. 1004-1007 ◽  
Author(s):  
Sylvain Clède ◽  
Noemi Cowan ◽  
François Lambert ◽  
Hélène C. Bertrand ◽  
Riccardo Rubbiani ◽  
...  
Keyword(s):  
Infrared Imaging ◽  
X Ray ◽  
Organometallic Derivative

scholarly journals The deep Chandra survey in the SDSS J1030+0524 field

2020 ◽  
Vol 637 ◽  
pp. A52 ◽  
Author(s):  
R. Nanni ◽  
R. Gilli ◽  
C. Vignali ◽  
M. Mignoli ◽  
A. Peca ◽  
...  
Keyword(s):  
Large Scale ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Cumulative Number ◽  
Imaging Data ◽  
X Ray ◽  
Large Scale Structures ◽  
Multi Wavelength ◽  
Deep Fields ◽  
Initial Source

We present the X-ray source catalog for the ∼479 ks Chandra exposure of the SDSS J1030+0524 field, which is centered on a region that shows the best evidence to date of an overdensity around a z > 6 quasar, and also includes a galaxy overdensity around a Compton-thick Fanaroff-Riley type II (FRII) radio galaxy at z = 1.7. Using wavdetect for initial source detection and ACIS Extract for source photometry and significance assessment, we create preliminary catalogs of sources that are detected in the full (0.5−7.0 keV), soft (0.5−2.0 keV), and hard (2−7 keV) bands, respectively. We produce X-ray simulations that mirror our Chandra observation to filter our preliminary catalogs and achieve a completeness level of > 91% and a reliability level of ∼95% in each band. The catalogs in the three bands are then matched into a final main catalog of 256 unique sources. Among them, 244, 193, and 208 are detected in the full, soft, and hard bands, respectively. The Chandra observation covers a total area of 335 arcmin2 and reaches flux limits over the central few square arcmins of ∼3 × 10−16, 6 × 10−17, and 2 × 10−16 erg cm−2 s−1 in the full, soft, and hard bands, respectively This makes J1030 field the fifth deepest extragalactic X-ray survey to date. The field is part of the Multiwavelength Survey by Yale-Chile (MUSYC), and is also covered by optical imaging data from the Large Binocular Camera (LBC) at the Large Binocular Telescope (LBT), near-infrared imaging data from the Canada France Hawaii Telescope WIRCam (CFHT/WIRCam), and Spitzer IRAC. Thanks to its dense multi-wavelength coverage, J1030 represents a legacy field for the study of large-scale structures around distant accreting supermassive black holes. Using a likelihood ratio analysis, we associate multi-band (r, z, J, and 4.5 μm) counterparts for 252 (98.4%) of the 256 Chandra sources, with an estimated reliability of 95%. Finally, we compute the cumulative number of sources in each X-ray band, finding that they are in general agreement with the results from the Chandra Deep Fields.

X-Ray, Optical, and Infrared Imaging and Spectral Properties of the 1 M[CLC]s[/CLC] Chandra Deep Field North Sources

2002 ◽  
Vol 124 (4) ◽  
pp. 1839-1885 ◽  
Author(s):  
A. J. Barger ◽  
L. L. Cowie ◽  
W. N. Brandt ◽  
P. Capak ◽  
G. P. Garmire ◽  
...  
Keyword(s):  
Spectral Properties ◽  
Infrared Imaging ◽  
X Ray

scholarly journals Evidence for magnetic activity at starbirth: a powerful X-ray flare from the Class 0 protostar HOPS 383

2020 ◽  
Vol 638 ◽  
pp. L4 ◽  
Author(s):  
Nicolas Grosso ◽  
Kenji Hamaguchi ◽  
David A. Principe ◽  
Joel H. Kastner
Keyword(s):  
Near Infrared ◽  
Infrared Imaging ◽  
Direct Proof ◽  
Magnetic Activity ◽  
Evolutionary Stage ◽  
X Rays ◽  
X Ray ◽  
Order Of Magnitude ◽  
Solar Type ◽  
Bona Fide

Context. Class 0 protostars represent the earliest evolutionary stage of solar-type stars, during which the majority of the system mass resides in an infalling envelope of gas and dust and is not yet in the central, nascent star. Although X-rays are a key signature of magnetic activity in more evolved protostars and young stars, whether such magnetic activity is present at the Class 0 stage is still debated. Aims. We aim to detect a bona fide Class 0 protostar in X-rays. Methods. We observed HOPS 383 in 2017 December in X-rays with the Chandra X-ray Observatory (∼84 ks) and in near-infrared imaging with the Southern Astrophysical Research telescope. Results. HOPS 383 was detected in X-rays during a powerful flare. This hard (E >  2 keV) X-ray counterpart was spatially coincident with the northwest 4 cm component of HOPS 383, which would be the base of the radio thermal jet launched by HOPS 383. The flare duration was ∼3.3 h; at the peak, the X-ray luminosity reached ∼4 × 1031 erg s−1 in the 2−8 keV energy band, a level at least an order of magnitude larger than that of the undetected quiescent emission from HOPS 383. The X-ray flare spectrum is highly absorbed (NH ∼ 7 × 1023 cm−2), and it displays a 6.4 keV emission line with an equivalent width of ∼1.1 keV, arising from neutral or low-ionization iron. Conclusions. The detection of a powerful X-ray flare from HOPS 383 constitutes direct proof that magnetic activity can be present at the earliest formative stages of solar-type stars.

scholarly journals The origin of the Galactic center diffuse X-ray emission investigated by near-infrared imaging and polarimetric observations

2013 ◽  
Vol 9 (S303) ◽  
pp. 449-453
Author(s):  
Shogo Nishiyama ◽  
Kazuki Yasui ◽  
Tetsuya Nagata ◽  
Tatsuhito Yoshikawa ◽  
Hideki Uchiyama ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Galactic Center ◽  
Toroidal Magnetic Field ◽  
Stellar Disk ◽  
X Ray ◽  
Hot Plasma ◽  
Bulge Region

AbstractThe origin of the Galactic center diffuse X-ray emission (GCDX) is still under intense investigation. We have found a clear excess in a longitudinal GCDX profile over a stellar number density profile in the nuclear bulge region, suggesting a significant contribution of diffuse, interstellar hot plasma to the GCDX. We have estimated that contributions of an old stellar population to the GCDX are ∼50% and ∼20% in the nuclear stellar disk and nuclear star cluster, respectively. Our near-infrared polarimetric observations show that the GCDX region is permeated by a large scale, toroidal magnetic field. Together with observed magnetic field strengths in nearly energy equipartition, the interstellar hot plasma could be confined by the toroidal magnetic field.

Numerical methods in tomography

Acta Numerica ◽  
1999 ◽  
Vol 8 ◽  
pp. 107-141 ◽  
Author(s):  
Frank Natterer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Incomplete Data ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Reconstruction Algorithms ◽  
Resonance Imaging ◽  
Discrete Tomography ◽  
X Ray ◽  
Local Tomography ◽  
Image Reconstruction Algorithms

In this article we review the image reconstruction algorithms used in tomography. We restrict ourselves to the standard problems in the reconstruction of function from line or plane integrals as they occur in X-ray tomography, nuclear medicine, magnetic resonance imaging, and electron microscopy. Nonstandard situations, such as incomplete data, unknown orientations, local tomography, and discrete tomography are not dealt with. Nor do we treat nonlinear tomographic techniques such as impedance, ultrasound, and near-infrared imaging.

scholarly journals An imaging and spectroscopic methodology for in situ analysis of ceiling and wall decorations in Colonial missions in Northern Mexico from XVII to XVIII centuries

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Edgar Casanova-González ◽  
Miguel Ángel Maynez-Rojas ◽  
Alejandro Mitrani ◽  
Isaac Rangel-Chávez ◽  
María Angélica García-Bucio ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Infrared Imaging ◽  
Spanish Colonial ◽  
X Ray ◽  
Northern Mexico ◽  
Non Invasive ◽  
Materials Used ◽  
Non Destructive

Abstract Almost three hundred Spanish colonial missions—or their remains—are scattered over the vast state of Chihuahua in northern Mexico. A few of them still display painted decorations on the wood ceilings and walls. The decorated areas vary greatly, from the whole ceiling of the main aisle to just a few square meters in a lateral chapel, and so does the conservation state of the paintings. In this context, the information regarding the paintings’ composition plays a key role in the restoration and conservation processes. For the gathering of such information, we propose a combined methodology for a fast, non-destructive and non-invasive characterization of such paintings with a minimum of techniques. This methodology includes false color infrared imaging as a first approach to determine the composition of large areas of the paintings and the homogeneity of the materials used in the painted areas, followed by small area analysis by X-ray fluorescence and fiber-optics reflectance spectroscopy. This methodology was applied to characterize the elemental and molecular composition of the decorations for four missions in Chihuahua in a fast and specific manner, revealing the use of a mix of mineral and organic materials including indigo and cochineal, and detecting differences between the missions. The methodology presented here can be easily applied for the study of a wider number of missions in Chihuahua and other regions to provide outstanding information of materials, pictorial techniques and deterioration conditions.

scholarly journals Near-infrared imaging of hard X-ray selected active galaxies – I. Decomposition into nuclear and stellar components

1992 ◽  
Vol 256 (1) ◽  
pp. 125-148 ◽  
Author(s):  
J. K. Kotilainen ◽  
M. J. Ward ◽  
C. Boisson ◽  
D. L. DePoy ◽  
L. R. Bryant ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Imaging ◽  
Active Galaxies ◽  
Near Infrared Imaging ◽  
X Ray
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