QA

As a critical step in the HostSub_GP workflow, users should perform quality assurance (QA) checks to ensure the accuracy and reliability of the host galaxy subtraction. HostSub_GP generates a series of QA plots that visualize the results of the data preprocessing, GP modeling, and host subtraction. These plots are saved in the QA/ folder.

Here we provide an overview of the key QA plots with the example of SN2019eix, a Type Ia supernova emerged on the bar of a bright galaxy, observed with Keck/LRIS.

Host Galaxy Prior

Pre-processed 2D Spectra

Prior Check

Comparison between the observed and prior 2D spectral profiles

Posterior Check

Predicted 2D Spectra

Extracted 1D Spectra

1D spectra extracted from the host-subtracted 2D spectra