File:UDS10Wil-1.png

The WFC3 F160W + F125W discovery and difference images (using a late-time, SN-free template) for SN UDS10Wil. The SN is located ∼ 0 .1 from the center of the host galaxy (2 ACS pixels). The contours plotted on the difference image of the SN (upper left) show the regions containing 68% and 95% of the host galaxy light. The center of the nearest neighboring galaxy, which causes minimal lensing of the SN (see §4.1), is located ∼ 1 .5 away. z = 1.91 (SN UDS10Wil), the highest-redshift SN Ia discovered to date. It was found in the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS, PI: Faber & Ferguson; Grogin et al. 2011; Koekemoer et al. 2011).

Image obtained from https://www.researchgate.net/publication/236202773_The_Discovery_of_the_Most_Distant_Known_Type_Ia_Supernova_at_Redshift_1914