Imaging X-ray Polarimetry Explorer: prelaunch

TLDR

Launched on December 9 2021, the Imaging X‑ray Polarimetry Explorer (IXPE) is a NASA Small Explorer Mission partnered with the Italian Space Agency. IXPE aims to open a new window into the universe by performing imaging X‑ray polarimetry. IXPE comprises three identical telescopes with mirror modules and polarization‑sensitive detectors, a deployable 4‑m boom, and a three‑axis‑stabilized spacecraft that will conduct precise polarimetry over a two‑year baseline.

Abstract

Launched on 2021 December 9, the Imaging X-ray Polarimetry Explorer (IXPE) is a NASA Small Explorer Mission in collaboration with the Italian Space Agency (ASI). The mission will open a new window of investigation—imaging x-ray polarimetry. The observatory features three identical telescopes, each consisting of a mirror module assembly with a polarization-sensitive imaging x-ray detector at the focus. A coilable boom, deployed on orbit, provides the necessary 4-m focal length. The observatory utilizes a three-axis-stabilized spacecraft, which provides services such as power, attitude determination and control, commanding, and telemetry to the ground. During its 2-year baseline mission, IXPE will conduct precise polarimetry for samples of multiple categories of x-ray sources, with follow-on observations of selected targets.