v4.0.0

Octofitter v4.0.0

Diff since v3.1.0

Breaking changes

• RV zero points and jitters must now be specified as array-valued distributions. E.g. rv0 ~ MvNormal([100,100]) instead of rv0_1 ~ Normal(100); rv0_2 ~Normal(100).

New Features

• More robust, and more efficient initialization of chains
• KDE priors
• Multi dimensional / correlated priors, e.g. can sample from a spectrum using a multivariate normal list.
• Much improved Hipparcos IAD modelling
• RV Modelling can now account for perspective acceleration
• Precision Improvements: more accurate treatment of time throughout code, now suitable for very short period orbits
• Improved plots
• Support for closure phase / kernel phase modelling of GRAVITY raw data.
• Support for nested sample with Dynesty.jl (ONLY for sake of performance comparison to Pigeons, not recommended)
• Added ability to sample from x vs y positions, for single epoch observations (e.g. detection maps)
• Added ability to use Octofitter to extract classical photometry and astrometry from images
• Plotting style improvements
• Probabilistic programming language: can now interpolate global variables into the model definition using $
• Additional error checking and robustness
• Warnings generated for type-instability in models that could cause poor performance

Merged pull requests:

• CompatHelper: add new compat entry for HTTP at version 1, (keep existing compat) (#38) (@github-actions[bot])
• CompatHelper: add new compat entry for Distances at version 0.10, (keep existing compat) (#39) (@github-actions[bot])
• CompatHelper: add new compat entry for CSV at version 0.10, (keep existing compat) (#40) (@github-actions[bot])

Closed issues:

• Jupiter mass definition should follow IAU standard (#34)
• Issue using RV data with octofitterpy (#41)

v3.1.0

Octofitter v3.1.0

Diff since v3.0.2

• Fixes a regression in Pigeons by upper-bounding the version compat
• Plotting improvements (style tweaks and performance improvements)
• Use BJD instead of JD for both HARPS RV data sources
• Export KDEDist constructor for kernel density estimates
• Improve KDEDist constructor with optional upper and lower bounds
• 2-4x improvement in HGCA modelling performance
• Improvement to pathfinder-based sampler initialization (both HMC and Pigeons)
• GRAVITY-wide likelihood now works regardless of the number of spectral channels used
• Introduce experimental FixedPosition "orbit" parameterization for modelling eg image or interferometry data at a single epoch, where there is no interest in the orbit parameters

v3.0.2

Octofitter v3.0.2

Diff since v3.0.1

• Typo fix in corner plot (thanks @gotten)
• Display chain number while intializing with Pigeons
• Remove arbitrary limit on the number of jitter and offset terms in StarAbsoluteRVLikelihood (thanks @langfzac)

Merged pull requests:

• Allow arbitrary RV jitter and offset terms (#32) (@langfzac)

Closed issues:

• Number of RV instrument jitter/offset parameters (#26)
• Typo in axis label OctofitterPairPlotsExt.jl (#33)

v3.0.1

Octofitter v3.0.1

Diff since v3.0.0

Hot fix: rename HiparcosIADLikelihood to HipparcosIADLikelihood

v3.0.0

Octofitter v3.0.0

Diff since v2.5.0

• Overhauled plots
• Fit relative RV between a planet and star
• Fit unbound hyperbolic orbits
• Model Hipparcos IAD directly
• Rigorous 3D propagation of high RV / proper motion stars (Thanks Eric Nielsen!)
• Compute point wise likelihoods and cross-validation scores after sampling a posterior
• Use kernel density estimates as priors
• More automatic data sources for astrometry, RV, and atmosphere models
• Import/export posteriors in Orbitize! format
• Improved tempered sampling defaults (use stabilized variational PT by default)
• Bug fixes

Merged pull requests:

• CompatHelper: add new compat entry for OptimizationOptimJL at version 0.3, (keep existing compat) (#25) (@github-actions[bot])
• CompatHelper: add new compat entry for Makie in [weakdeps] at version 0.21, (keep existing compat) (#28) (@github-actions[bot])
• CompatHelper: add new compat entry for PairPlots in [weakdeps] at version 2, (keep existing compat) (#29) (@github-actions[bot])

v2.5.0

Octofitter v2.5.0

Diff since v2.4.0

• Fixes to @System and @planet macro scoping
• Improved error messages for some kinds of model mis-specifications
• New feature: load and save basic chains in Orbitize! HDF5 format.
• New feature: load posteriors and sample data directly from whereistheplanet.com
• New feature: compute point wise likelihoods and cross-validation scores via PSIS-LOO
• Tweak to Sine() prior for numerical issues (limits are now eps() instead of zero)
• UniformCircular() priors now have a less aggressive prior on the internal vector length
• Pigeons sampler now starts from a better location upon initialization
• Change: Enzyme is no longer loaded by default, and must be imported by the user. As a result, the package load time is much faster! The default :ForwardDiff autodial backend is unchanged

v2.4.0

Octofitter v2.4.0

Diff since v2.3.1

• Fixes to Enzyme forward-mode autodiff
• Experimental function for calculating pointwise likelihoods given a model and posterior chain
• Fix regression in corner plots

v2.3.1

Octofitter v2.3.1

Diff since v2.3.0

v2.3.0

Octofitter v2.3.0

Diff since v2.2.0

• Automatically save the plot outputs of octocorner using the already-provided system name.

v2.2.0

Octofitter v2.2.0

Diff since v2.1.0

• Add helpers for using the theta parameter published in the octofitter paper
• Improve the corner plot output to always show the actual variable names, not just English descriptions. This can be overridden by passing a labels dict.
• Speed up initial pathfinder solve (first phase of octofit) by reducing optimizer relative tolerance to 1e-10
• Improve compile times for each new model fit with octofit_pigeons slightly