Universal Reactivity - Observed Upper Envelope of the Dimensionless k Parameter from Gravitational-Wave Energy Estimates (Dataset and Methods)

We present an analysis of the observed upper envelope of the dimensionless parameter k, defined as K_adim = E_GW / (M c^2 f ⋅ τ), computed from radiated gravitational‑wave energy estimates and posterior‑based final mass medians for selected GW events. Top 1% (k_adim): single event GW151012.