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kazewong / jim

Gravitational-wave data analysis tools in Jax
MIT License
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Extrinsic parameters marginalization #2

Open kazewong opened 2 years ago

kazewong commented 2 years ago

Marginalizing over extrinsic parameters should alleviate our computational load, but more important it should smooth out the likelihood surface so HMC will have a better time traversing the likelihood surface.

Three marginalization that can be done readily is time of coalescence, phase of coalescence (which is only valid when 22 mode is the dominant mode), and distance.

References: https://arxiv.org/pdf/1809.02293.pdf Marginalization over time: https://dcc.ligo.org/public/0114/T1400460/002/margtime.pdf Marginalization over phase: https://dcc.ligo.org/LIGO-T1300326/public Marginalization over distance: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.024013

kazewong commented 1 month ago

This is partially resolved by #71 . The remaining one worth investigating is distance prior. On top of this, it worth looking into more tricks in extrinsic parameters such as the ones described in https://arxiv.org/pdf/2207.03508

kazewong commented 1 month ago

@tsunhopang