From inspiral to merger and ringdown in slow motion.
-Chirp mass (Msun)
-Total mass (Msun)
-Wave frequency now (Hz)
-Strain amplitude now
-Time to merger (s)
-Frequency at the last stable orbit (Hz)
-Ringdown frequency (Hz)
-Energy radiated to ISCO (Msun c^2)
-Total Schwarzschild radius (km)
The science
Two masses orbiting each other radiate gravitational waves. To leading (quadrupole) order a circular binary loses orbital energy at P = (32/5) G^4 m1^2 m2^2 (m1 + m2) / (c^5 a^5), so the separation shrinks as da/dt = -(64/5) G^3 m1 m2 (m1 + m2) / (c^5 a^3) and the remaining time is tau = a^4 / (4 beta).
In terms of the chirp mass Mc = (m1 m2)^(3/5) / (m1 + m2)^(1/5) the wave frequency rises as f(tau) = (1/pi) (5 / 256 tau)^(3/8) (G Mc / c^3)^(-5/8), and the strain amplitude is h = (4 / d) (G Mc / c^2)^(5/3) (pi f / c)^(2/3) (face-on, plus polarisation). The wave frequency is twice the orbital frequency.
The inspiral formulas are cut at the innermost stable circular orbit, f_ISCO = c^3 / (6^(3/2) pi G M). After that the page plays an exponentially damped ringdown at the fitted quasi-normal-mode frequency for a final spin of about 0.69.
Honest simplifications: leading-order post-Newtonian physics only (real detectors need higher orders and numerical relativity near the merger), circular orbits, no spins, an abrupt hand-off to the ringdown instead of a smooth merger, and a fixed visual wavelength in the spiral drawing. The graph amplitudes are of the right order of magnitude (about 1e-21) but are not matched to any specific detection.