Species

- Support for nested sampling with `UltraNest`. The `run_ultranest` method is added in `FitModel`.
- Added the `spec_res` parameter in `ReadCalibration.resample_spectrum` to smooth a spectrum before resampling.
- Tools for empirical analysis. `CompareSpectra.spectral_type` can be used for determining the spectral type.
- The `plot_statistic` and `plot_empirical_spectra` functions can be used for plotting the results from `CompareSpectra`.
- Support for the SDSS spectra from Kesseli et al. (2017).
- Support for running `FitModel` with MPI. Requires the manual installation of `mpi4py`.
- Improved notebook tutorial for fitting data with model spectra.
- Some minor maintenance. Several warnings and errors added.

- Moved the remote storage location of the model grids.
- Reading `corr_len` and `corr_amp` parameters from `bounds` and use default values otherwise.
- Added `effective_width` method to `ReadFilter`.
- Updated README and Makefile.

- Compatibility with Python 3.8. The CI tests with Python 3.6, 3.7 and 3.8.
- Updated README, documentation and some minor maintenance.

- Support for fitting power-law spectra with `FitModel`.
- Support for fitting a blackbody disk component in `FitModel`.
- Support for ATMO, BT-Cond, and (now publically available) petitCODE hot grid spectra.
- Added the `inc_mass` parameter in `plot_posterior`.
- Improved `title_fmt` parameter in `plot_posterior`.
- Added the `flux_density` parameter in `add_object`.
- Support for ALMA fluxes.
- Renamed `plot_photometry` to `plot_mag_posterior`.
- Support of `get_mcmc_photometry` for calibration spectra.
- Improved sampling of the log-normal grain size distribution. The grid of cross sections has been recalculated.
- New error inflation approach. A scaling relative to the model fluxes is fitted instead of a constant value.
- A large number of smaller, new features and improvements.
- Some maintenance and updated dependencies.
- Updated tutorials, documentation and docstrings.
- Additional type hints and type checks.

- The spectra of AMES-Cond, AMES-Dusty, DRIFT-PHOENIX, BT-Settl, and BT-NextGen have been resampled to a spectral resolution of R=2000 and moved to a new download location (https://people.phys.ethz.ch/~ipa/tstolker/). The data size of these grids are typically several hundred MBs so downloading and processing is much faster now.
- Support for photon-counting detectors when calculating synthetic photometry. The detector type is stored as attribute with the filter profile.
- Extinction parameters have been added to `FitModel`: ISM extinction, a power-law size distribution of silicate grains, or a log-normal size distribution of silicate grains (see documentation for details).
- Functions in `plot_mcmc` for plotting the sampled extinction and size distributions: `plot_extinction` and `plot_size_distributions`.
- Refactoring of `dust_util`.
- Bug fix when fixing missing grid points with `add_model`.
- Support for the BT-Settl CIFIST spectra (`'bt-settl-cifist'`).
- Additional unit tests and updated documentation.
- Several minor improvements, bug fixes, new features, and maintenance.

- Nested sampling support by `FitModel` with `run_multinest`.
- Fitting blackbody spectra has been merged in `FitModel` and `FitPlanck` has been deprecated
- Support of `FitModel` for fitting calibration parameters, including a Gaussian process for correlated noise.
- Support for duplicate filter names.
- The `inc_phot` and `inc_spec` parameters allow for subsets of data.
- Added optical constants and a `reddening` parameter in `plot_color_magnitude` and `plot_color_color`.
- Added the `inc_luminosity` parameter in `plot_posterior.
- Improved and faster use of parallaxes.
- Type checks added to some of the classes and methods.
- Compatibility of `add_object` with the GRAVITY FITS format.
- Several new features for fine-tuning of plots, including the `plot_kwargs` parameter in `plot_spectrum`.
- Many small improvements and a few bug fixes.