English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The latest all-sky survey in hard X-ray band was performed by the HEAO-1satellite (13-80 keV) with an angular resolution of 24x48 arcmin. A diffusehard X-Ray background (HXB) was detected between 3 and 50 keV. The mainscientific goal of In.XS is to resolve a large fraction of this HXB intoindividual sources.  As no distortion by Compton up-scattering is seen in the spectrum of themicrowave background, the hard X-ray background is believed to be mainly due topoint sources. Type I Active Galactic Nuclei (AGN) have softer X-ray spectrathan the hard X-ray background, so other sources must be considered, like faintType II or absorbed AGN. These could be distinguished through hard X-rayspectroscopic or hardness ratio observations.  Here we present In.XS - a mission concept designed to conduct the firstimaging all-sky hard X-ray (2-80 keV) survey. The angular resolution of nearly1 arcmin and good sensitivity at high energies is provided by the latestmultilayer focussing mirrors, with semiconductor-based (GaAs) arrays ofdetectors. We also describe the mission operations, and how the all-sky surveywill be complemented by follow-up pointed observations of selected fields. Thegood angular resolution will allow correlations and identification with objectsseen at other wavelengths. In addition, since a large fraction of the Type IIAGN luminosity is emitted in the hard X-ray band, this survey will provide alarge unbiased sample of the AGN population. This may provide constraints onAGN evolution through the possible observation of a turnover in deep fieldsource statistics.

<title>In.XS: project for a future spaceborne hard x-ray all-sky survey</title>