Connor Stone, PhD

Model defined gradients in NUTS and HMC

3

For score based diffusion models in machine learning we have a function which computes the gradient of the potential (score) that is learned. It would be really nice if it...

Mass Matrix for NUTS and HMC

2

### Issue Description I would like to be able to interact with the mass matrix in the NUTS and HMC samplers. In many cases I have access to the covariance...

for _config and _toc files, only `yml` extension is recognized not `yaml`

2

### Describe the bug **context** When I do ___. **expectation** I expected both `yaml` and `yml` to be recognized since they are both standard convention. **bug** But instead only `yml`...

Poisson likelihood

7

**Is your feature request related to a problem? Please describe.** For data which is in the very low SNR domain, where individual photon/electron counts are discernable, the proper likelihood model...

Possibly don't need to optimize magnitude parameter for models

7

**Is your feature request related to a problem? Please describe.** In models such as Sersic there is a very strong covariance between `n`, `Re`, and `Ie`. This strong covariance may...

**Is your feature request related to a problem? Please describe.** I should have a unit test to ensure this works int he basic version

Downsampling fitting

1

**Is your feature request related to a problem? Please describe.** Some images are too large to fit at native resolution, other images are large and the object is also large...

**Is your feature request related to a problem? Please describe.** AstroPhot can fit PSF models live, but we need to be able to account for complex features of emperical PSFs....

Fair enough and beyond the scope here. Probably something to add to the documentation of specifying models. _Originally posted by @wmwv in https://github.com/Autostronomy/AstroPhot/pull/116#discussion_r1338934765_

**Is your feature request related to a problem? Please describe.** Need the capability to fit models where the parameters have constraints applied to them beyond equality constraints. Ideally with arbitrary...