Cosmological (inflation, cosmic-strings, phase-transitions) plus astrophysical (BBH-merger superposition) backgrounds; Omega_GW(f) energy-density spectrum; LIGO upper-limit ~6e-8.
Cosmological (inflation, cosmic-strings, phase-transitions) plus astrophysical (BBH-merger superposition) backgrounds; Omega_GW(f) energy-density spectrum; LIGO upper-limit ~6e-8.