# The enhanced X-ray Timing and Polarimetry mission - eXTP

## TL;DR

The eXTP mission is a space observatory designed to study extreme physics conditions and astrophysical phenomena with advanced instruments, providing high-quality data on dense matter, strong gravity, and magnetic fields, and supporting gravitational wave counterpart detection.

## Contribution

This paper introduces the eXTP mission, detailing its technological design, scientific objectives, and expected performance, representing a significant advancement in space-based high-energy astrophysics.

## Key findings

- Detailed instrument performance expectations
- Capabilities for detecting gravitational wave counterparts
- Potential to study matter under extreme conditions

## Abstract

In this paper we present the enhanced X-ray Timing and Polarimetry mission - eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources. The paper provides a detailed description of: (1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload; (2) the elements and functions of the mission, from the spacecraft to the ground segment.