Alexander Altmann | Searcharxiv

arXiv2026

Spectroscopic performance of the electrical functional models for the eXTP SFA-T detectors

The Spectroscopy Focusing Array (SFA) is one of the three instruments on the eXTP satellite. It consists of six telescopes plus focal plane cameras, where five are equipped with a Silicon Drift Detector (SDD) array. These five SFA-T (T stands for timing) instruments are used for observations with high time resolution (better than 10 microseconds), high throughput (dead time less than 5 % when observing a 1 Crab source), and good energy resolution (better than 180 eV at 6 keV). This paper presents the spectroscopic performance of the Electrical Functional Modules (EFM) for SFA-T that are assembled and tested at the Max Planck Institute for Extraterrestrial Physics (MPE). A focus lies on the energy resolution at the planned sensor operating temperature of -45 {\deg}C. Additionally, the use of a baffle that covers the pixel edges is studied.

astro-ph.IM↗

arXiv2025

The enhanced X-ray Timing and Polarimetry mission -- eXTP for launch in 2030

In this paper we present the current status of the enhanced X-ray Timing and Polarimetry mission, which has been fully approved for launch in 2030. eXTP is a space science mission designed to study fundamental physics under extreme conditions of matter density, gravity, and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring the effects of quantum electro-dynamics, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, the eXTP mission is poised to become a leading observatory for time-domain and multi-messenger astronomy in the 2030's, as well as providing observations of unprecedented quality on a variety of galactic and extragalactic objects. After briefly introducing the history and a summary of the scientific objectives of the eXTP mission, this paper presents a comprehensive overview of: 1) the cutting-edge technology, technical specifications, and anticipated performance of the mission's scientific instruments; 2) the full mission profile, encompassing spacecraft design, operational capabilities, and ground segment infrastructure.

astro-ph.HE↗