Extended Data Fig. 2: The position of AT 2016jka in color-magnitude space.
From: A gravitationally lensed supernova with an observable two-decade time delay
Colored points show simulated photometry for normal SNe of Type Ia (red), Type Ib/Ic (gold), and Type II (green), with 10,000 simulated SNe in each subclass (not all apparent on this plot). Histograms above and below show the marginalized distributions that have been rescaled to represent posterior probability density functions. They are normalized to integrate to unity, then multiplied by the SN subclass priors based on the host galaxy stellar population (row b in Supplementary Table 2). Open markers show the observed photometry of the SN. Dotted vertical lines mark the magnification correction based on the preferred LENSTOOL model (model E, described in Methods: Lens Modeling). Closed markers show the resulting magnification-corrected photometry, with asymmetric error bars reflecting the systematic uncertainty derived from the five lens model variants. Horizontal error bars in the upper panel indicate the observed uncertainty in the SN color (not affected by lensing). The relevant SN photometry markers are repeated in the histogram side-panels with arbitrary vertical positions. All three SN images are located in regions of color-magnitude space that are expected to be dominated by Type Ia SNe.
