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nanograv / PINT

PINT is not TEMPO3 -- Software for high-precision pulsar timing
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feat: add power-law solar wind gp as a noise component #1854

Open jeremy-baier opened 2 weeks ago

abhisrkckl commented 2 weeks ago

Does this model treat NE_SW as a Fourier Gaussian process?

abhisrkckl commented 2 weeks ago

And is this the same model Sai Chaitanya presented in the IPTA meeting?

jeremy-baier commented 2 weeks ago

Does this model treat NE_SW as a Fourier Gaussian process?

It models solar wind delay using a Fourier basis which is like a DM Fourier basis but multiplied by a geometric factor which encodes information about the pulsar line of sight with respect to the sun.

And is this the same model Sai Chaitanya presented in the IPTA meeting?

Yes, this is the power-law model which Sai presented at the 2024 IPTA meeting and is described in this paper. I have been testing this model with the priors and Fourier basis described in the paper.

jeremy-baier commented 2 weeks ago

There is not any physical justification for a power law specifically so I am hoping to code in a free spec here as well at some point.

abhisrkckl commented 1 week ago

The failing test is test_noise_models.py. You can fix this by adding your new component to the model returned by the model_and_toas fixture.