pgstat

gdt.core.spectra.fitting.pgstat(obs_counts, mod_rates, exposure, back_counts, back_var, back_exp)[source]

Profile Gaussian Likelihood. From the XSPEC Statistics Appendix.

Parameters:

  • obs_counts (np.array) – The total observed counts

  • mod_rates (np.array) – The model source rates

  • exposure (float) – The source exposure

  • back_counts (np.array) – The background model counts

  • back_var (np.array) – The background model count variance

  • back_exp (float) – The background exposure

Returns:

(float)