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NGC 3227 Blinks: An Extreme Changing-look Event in a Seyfert Galaxy

  • Authors: Kaiwen Zhang, Michael S. Brotherton, Pu Du, Dong-Wei Bao, Bi-Xuan Zhao, Feng-na Fang, Yan-Rong Li, Chen Hu, Ming Xiao, Keith Horne, Gerard A. Kriss, Daniel Proga, Jian-Min Wang

Kaiwen Zhang et al 2026 The Astrophysical Journal Letters 1011 .

  • Provider: AAS Journals

Caption: Figure 5.

Time-lag analysis of the continuum and broad Hβ emission during the normal phase. Same as Figure 4, but for the normal phase. Both methods yield a consistent reverberation lag of ∼5 days, with the MICA lag posterior distribution having a median of ∼5.4 days, indicating a stable BLR response under presumably unobscured conditions.

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