16497

We ask for 8 WFC3 orbits to observe four Type Ia supernovae (SNe Ia) when they are virgul230-430 days past maximum light. At these phases comma normal SNe Ia have been shown to undergo a plateau phase in the near-infrared (NIR) while continuing to decline in the optical. Our sample consists of two normal SNe Ia and two peculiar SNe Iax. With two visits per SN during this phase range comma we will use observations in F125W (J) comma F160W (H) comma F336W (U) comma and F350LP (optical) todoublePoint (1) confirm the J-band plateau for normal SNe Ia (2) test whether the plateau is caused by scattering of photons from the UV-optical to the NIR (3) test whether SNe Iax also exhibit a NIR plateau and (4) detect the surviving white dwarf progenitors of SNe Iax. At late times comma observations drive theory comma and ours will help shed light on the progenitor and explosion physics of both normal SNe Ia and their peculiar Iax cousins.