Galactic X-Ray Polarimetry and High-Resolution X-Ray Spectroscopy

High-resolution X-ray emission and X-ray absorption spectroscopy.

In this review, high-resolution X-ray emission and X-ray absorption spectroscopy will be discussed. The focus is on the 3d transition-metal systems. To understand high-resolution X-ray emission and resonant X-ray emission, it is first necessary to spend some time discussing the X-ray absorption process. Section II discusses 1s X-ray absorption, i.e., the K edges, and section III deals with 2p X...

X-ray and Gamma-ray Polarimetry

Towards Three Bursting Low - Mass X - ray Binaries from High Resolution X - ray Spectroscopy

We measured the galactic hydrogen column densities to the neutron-star binaries GX 17+2, 4U 1705−44, and 4U 1728−34 by modeling the Mg and Si absorption edges found in high-resolution X-ray spectra obtained by the Chandra X-ray Observatory. We found for GX 17+2, NH = (2.38 ± 0.12) × 10 22 cm, for 4U 1705−44, NH = (2.44 ± 0.09) × 10 cm, and for 4U 1728−34, NH = (2.49 ± 0.14) × 10 22 cm. These va...

High-resolution X-ray fluorescence and excitation spectroscopy of metalloproteins.

A spectrograph has been developed with sufficient efficiency to make high-resolution fluorescence experiments on metalloproteins possible. The resolution of this spectrometer can reach 0.45 eV at 7.1 keV emission energy. The focus images of this multiple curved-crystal array spectrometer are presented. The chemical sensitivity of Kbeta emission spectra can be used to identify chemical states, a...

X-ray High Resolution and Imaging Spectroscopy of Supernova Remnants

The launch of Chandra and XMM-Newton has led to important new findings concerning the X-ray emission from supernova remnants. These findings are a result of the high spatial resolution with which imaging spectroscopy is now possible, but also some useful results have come out of the grating spectrometers of both X-ray observatories, despite the extended nature of supernova remnants. The finding...