This White Paper, submitted to the recent ESA call for science themes to define its future large
missions, advocates the need for a transformational leap in our understanding of two key …

The X-ray Integral Field Unit (X-IFU) is the high resolution X-ray spectrometer of the ESA
Athena X-ray observatory. Over a field of view of 5’ equivalent diameter, it will deliver X-ray …

We present high spectral resolution Very Large Telescope observations of the broad absorption
line quasar SDSS J0318− 0600. This high-quality data set allows us to extract accurate …

The Athena X-ray Integral Unit (X-IFU) is the high resolution X-ray spectrometer studied since
2015 for flying in the mid-30s on the Athena space X-ray Observatory. Athena is a versatile …

The ASTRO-H mission was designed and developed through an international collaboration
of JAXA, NASA, ESA, and the CSA. It was successfully launched on February 17, 2016, and …

High-resolution X-ray spectroscopy with Hitomi was expected to resolve the origin of the
faint unidentified $ E\approx 3.5\,\mathrm {keV} $

The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray
missions developed by the Institute of Space and Astronautical Science (ISAS), with a planned …

The X-Ray Imaging and Spectroscopy Mission (XRISM) is the successor to the 2016 Hitomi
mission that ended prematurely. Like Hitomi, the primary science goals are to examine …

We present the overall design and performance of the Astro-H (Hitomi) Soft X-Ray Spectrometer
(SXS). The instrument uses a 36-pixel array of x-ray microcalorimeters at the focus of a …

The Hitomi (ASTRO-H) mission is the sixth Japanese x-ray astronomy satellite developed
by a large international collaboration, including Japan, USA, Canada, and Europe. The …