Module distortion

Distortion extraction and characterization.

Given the photon distortion Δn(x), extract the standard distortion parameters (μ, y, temperature shift) and compute residuals.

Structs

DistortionParams

Complete distortion decomposition result.

Constants

DEFAULT_DECOMP_X_MAX

DEFAULT_DECOMP_X_MIN

Default frequency band for Gram-Schmidt and B&F decompositions.

FIRAS_MU_LIMIT

FIRAS 95% CL upper limits on spectral distortion parameters.

FIRAS_Y_LIMIT

Functions

decompose

Convenience wrapper: returns (mu, y, delta_t_over_t) tuple.

decompose_distortion

Decompose a spectral distortion into μ, y, and temperature shift components.

decompose_gram_schmidt

CJ2014 Appendix A: Gram-Schmidt decomposition over a frequency band.

decompose_nonlinear_be

Bianchini & Fabbian (2022) nonlinear fit: μ inside the BE exponential.

decomposition_band_count

Number of grid points falling inside the default μ/y decomposition band [DEFAULT_DECOMP_X_MIN, DEFAULT_DECOMP_X_MAX].

delta_n_to_intensity_mjy

Convert distortion Δn(x) to specific intensity ΔI_ν in MJy/sr.

firas_check

Check distortion parameters against FIRAS limits. Returns (mu_fraction, y_fraction) as fraction of the FIRAS limit.