#### Our understanding of the observed mismatches on the O1/O2 events compared to the data given in the PE release repo:
#### Our understanding of the observed mismatches on the O1/O2 events compared to the data given in the PE release repo:
* Our results are based on a recently released version of the `LALSuite` master: with the following git hash: cde08c79 [https://git.ligo.org/lscsoft/lalsuite/-/tags/lalsuite-v6.67]
* Our results are based on a recently released version of the `LALSuite` master: with the following git hash: cde08c79 [https://git.ligo.org/lscsoft/lalsuite/-/tags/lalsuite-v6.67]
* Runs we compared with are listed here: from the PE sample release repo: https://git.ligo.org/pe/lvc_pe_sample_release/-/tree/master/ Possible uses a `lalinference_o2` branch [ADD Git Hash?]
* Runs we compared with are listed here: from the PE sample release repo: https://git.ligo.org/pe/lvc_pe_sample_release/-/tree/master/ Possible uses a `lalinference_o2` branch [ADD Git Hash?]
* We notice significant differences between our BBH runs and these runs. We find that some of the spin angles are consistently different. In particular, the behaviour of \phi_JL seems to be consistently "out-of-phase" indicating that this is a change in the spin convention. More than this, , `logL`, `D_L`, `theta_{JN}`, `matched filter snrs` are different. The log BFs show a difference of (maximum) `~ \pm2`
* We notice significant differences between our BBH runs and these runs. We find that some of the spin angles are consistently different. In particular, the behaviour of \phi_JL seems to be consistently "out-of-phase" indicating that this is a change in the spin convention. More than this, , `logL`, `D_L`, `theta_{JN}`, `matched filter snrs` are different. The log BFs show a difference of (maximum) `~ \pm2`
* After seeking help from the waveform group we found the following changes recently happened to the LALSuite versions, and those could lead to a difference in the estimates.
* After seeking help from the waveform group we found the following changes recently happened to the LALSuite versions, and those could lead to a difference in the estimates.
* The waveforms changed conventions of the frame in which the spin components are specified: the in-plane spin components get rotated by the orbital phase. See https://dcc.ligo.org/LIGO-T1800226 for a summary.
* The waveforms changed conventions of the frame in which the spin components are specified: the in-plane spin components get rotated by the orbital phase. See https://dcc.ligo.org/LIGO-T1800226 for a summary.
