CosmoFit.EBOSSLyaLikelihood¶

class CosmoFit.EBOSSLyaLikelihood(cosmology, version='dr16')[source]¶

Bases: TabulatedBAOLikelihood

eBOSS DR16 Lyman-alpha forest BAO, (D_M/r_d, D_H/r_d) at z_eff = 2.334, as a tabulated two-dimensional likelihood.

The default version multiplies the forest auto-correlation by its cross-correlation with quasars; "dr16_auto" and "dr16_cross" are the halves.

Warning

Overlaps "desi", whose own Lyman-alpha measurement at z ~ 2.33 is drawn from much of the same sky. Do not use more than one version at a time either – the halves are what the default is built from.

Parameters:: version (str)

__init__(cosmology, version='dr16')¶

Parameters:: version (str)

Methods

`__init__`(cosmology[, version])
`chi2`()	`-2 log L`, so this composes with the Gaussian likelihoods it is summed with.
`log_likelihood`()	Log-likelihood at the current cosmology.
`log_likelihood_at`(values)	Interpolate the released surface at given distance ratios, with no cosmology involved.
`model`()	Predicted distance ratios, one per tabulated observable.
`predictions`()	Alias for model().
`residuals`()	Prediction minus the grid's most probable point.
`summary`()	Return a summary of the likelihood evaluation.

Attributes

`FAMILY`	Loader family, set by the subclass.
`LABEL`	Display name, set by the subclass.
`n_data`	Number of data points.
`name_and_size`	Name together with the number of data points.