Unlocking the Future of X-Ray Polarimetry with IXPE: Lessons Learned and Next Steps

TL;DR

This paper reviews the development, operation, and scientific achievements of the IXPE mission, highlighting lessons learned that guide future X-ray polarimetry missions and discussing the mission's extension through 2028.

Contribution

It provides a comprehensive overview of IXPE's early challenges, solutions, scientific results, and insights for designing next-generation X-ray polarimetry instruments.

Findings

Successful observation of about 100 sources with meaningful polarimetry

On-board calibration system effectively mitigated detector issues

Mission extended through 2028 based on scientific and operational success

Abstract

This paper discusses issues encountered during the early development of the instrument on the Imaging X-ray Polarimetry Explorer (IXPE), a NASA ASI Small Explorer mission launched on 9 December 2021. IXPE has observed about 100 sources, yielding meaningful polarimetry for most of them. An on-board calibration system mitigated most non-ideal detector behaviors during operations. Data from the on-board polarized and unpolarized X-ray sources are routinely ingested by the flight pipeline to correct the instrument response in a manner transparent to users. Based on its scientific return and payload health, the IXPE mission has been extended through 2028. The lessons learned are informing the design of next-generation X-ray polarimetry missions, as discussed elsewhere in these conferences.