Nature CommunicationsReverberation lags viewed in hard X-rays from an accreting stellar-mass black holeBei YouWei YuAdam IngramBarbara De MarcoJin-Lu QuZong-Hong ZhuAndrea SantangeloSai-En Xu2026-02-17Full textDOI https://doi.org/10.1038/s41467-026-69604-9