Previous IXPE Cycles

Cycle 3 - February 2026 through January 2027

Proposals were due September 11th 2025

Cycle 3 accepted targets
Cycle 3 accepted program abstracts
Trigger criteria for accepted Cycle 3 ToO programs
Guide for IXPE Cycle 3 proposers

Cycle 2 - February 2025 through January 2026

Proposals were due August 29th 2024

Cycle 2 accepted targets
Cycle 2 accepted program abstracts
Trigger criteria for accepted Cycle 2 ToO programs
Guide for IXPE Cycle 2 proposers

Cycle 1 - February 2024 through January 2025

Proposals were due October 18th 2023

Cycle 1 accepted targets
Cycle 1 accepted program abstracts
Guide for IXPE Cycle 1 proposers

Prime Mission - January 2022 through January 2024

Prime mission targets