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Unchanged X-Ray Polarization during Accretion Dips in the Low Hard State of Cygnus X-1

Authors: Yu-Shan Ling, Fei Xie, Alessandro Di Marco, Fabio La Monaca, Ming-Yu Ge

Yu-Shan Ling et al 2026 The Astrophysical Journal 1011 .

Caption: Figure D2.

Light curves and hardness ratios of Cyg X-1 from IXPE observations in 2023, 2024, and 2026, showing dips.