analysis.band_fitting

The band_fitting module performs fits of individual bands of observed light-curves

Function Documentation

analysis.band_fitting.create_empty_table(parameters, **kwargs)

Create an empty table for storing fit results

Columns:

• obj_id
• band
• source
• pre_max
• post_max
• num_params
• *parameters
• *parameters + _err
• chisq
• ndof
• b_max
• delta_15
• message

Parameters:

• parameters (iter) – List of parameter names to add columns for
• arguments to pass astropy.Table (Any) –

Returns:

A masked astropy Table

analysis.band_fitting.fit_results_to_dict(data, obj_id, band_name, results, fitted_model)

Format sncosmo fit results so they can be appended to an astropy table

See the create_empty_table function for information on the assumed table format.

Parameters:

• data (Table) – The data used in the fit
• obj_id (str) – The id of the object that was fit
• band_name (str) – The name of the band that was fit
• results (Result) – Fitting results returned by sncosmo
• fitted_model (Model) – A fitted sncosmo model

Returns:

Fit results as a dictionary

analysis.band_fitting.fit_single_target(fit_func, data, model, priors=None, kwargs=None, out_table=None, show_plots=False)

Run fits to individual bands of an observed light-curves

Parameters:

• data (Table) – Table of photometric data
• fit_func (func) – Function to use to run fits (eg. sncosmo.fit_lc)
• model (Model) – The model to use when fitting
• priors (dict) – Priors to use when fitting
• out_table (Table) – Append results to an existing table
• kwargs (dict) – Kwargs to pass fit_func when fitting
• show_plots (bool) – Plot and display each individual fit

Returns:

A table with results each model / dataset combination

analysis.band_fitting.tabulate_band_fits(data_release, models, fit_func, config=None, out_path=None)

Tabulate fit results for a collection of data tables

Results already written to out_path are skipped.

Parameters:

• data_release (module) – An sndata data release
• models (list) – A list of sncosmo models
• fit_func (func) – Function to use to run fits
• config (dict) – Specifies priors / kwargs for fitting each model
• out_path (str) – Optionally cache results to file in real time

Returns:

An astropy table with fit results