  We present preliminary limits on the presence of planets around white dwarf
stars using the IRAC photometer on the Spitzer space telescope. Planets emit
strongly in the mid-infrared which allows their presence to be detected as an
excess at these wavelengths. We place limits of $5 M_J$ for 8 stars assuming
ages of $1 Gyr$, and $10 M_J$ for 23 stars.We describe our survey, present our
results and comment on approaches to improve our methodology.
