Setting priors for jitter?

[melissa-hobson]

I'm trying out pyaneti to fit some ESPRESSO data, and when I include jttter I'm getting rather large values on the RV jitter (~ 5 m/s, which seems excessive for ESPRESSO!).

Looking into the code, it seems the jitter prior values are hard-coded (in todo-py.py) as [1e-3,1] which I assume is in km/s - meaning a lower bound of 1 m/s, is that correct?

Is it possible to change the jitter priors by passing something in the input file? Or if it's not doable through the input file, can I change the hard-coded value, or will that break things?