Waveform data for Gravitational waveforms for high spin and high mass-ratio binary black holes: A synergistic use of numerical-relativity codes

This dataset consists of binary black hole waveforms for three different configurations

* q=3, chi1=chi2=0.9
* q=4, chi1=chi2=0.9
* q=5, chi1=chi2=0.9

where q = m1/m2 is the ratio of the black hole masses, and chi1 and chi2 are the dimensionless spins of the black holes, oriented parallel to and in the direction of the orbital angular momentum.

The waveforms are computed using the 3-dimensional numerical relativity simulation codes

         SpEC (SPectral Einstein Code -- https://www.black-holes.org/code/SpEC.html)
         ET (Einstein Toolkit -- https://einsteintoolkit.org)

SpEC is computationally efficient and accurate, and produces long waveforms, but in these cases, the simulations crash at the merger.  The ET is less computationally efficient and accurate, but the simulations complete successfully.  We therefore combine long SpEC inspirals with short ET mergers, blending the waveforms to produce hybrid waveforms.

The waveform data directories are named as follows:

q=3,chi1=chi2=0.9:
  SpEC: q3_0.9_0.9_r200
  ET: ceas_22_e5_2
  Hybrid: q3_0.9_0.9_r200_hyb_ceas_22_e5_2

q=4,chi1=chi2=0.9:
  SpEC: q4_0.9_0.9_EccNew
  ET: ceas_20_5_e7
  Hybrid: q4_0.9_0.9_EccNew_hyb_ceas_20_5_e7

q=5,chi1=chi2=0.9:
  SpEC: q5.0_s0_0_0.9_s0_0_0.9_r200
  ET: ceas_23_e5_2
  Hybrid: q5.0_s0_0_0.9_s0_0_0.9_r200_hyb_ceas_23_e5_2

The data is in the SXS simulation format (https://data.black-holes.org/waveforms/documentation.html), though only a subset of the SXS-format data is present.

Also included is a Mathematica notebook, HybridizeWaveforms.nb, showing how the hybrid can be computed from the separate inspiral and merger waveforms using the open source SimulationTools code (https://simulationtools.org).

See the paper

  I. Hinder, S. Ossokine, H. Pfeiffer and A. Buonanno -- Gravitational waveforms for high spin and high mass-ratio binary black holes: A synergistic use of numerical-relativity codes

for more details.