Program: GS-2004A-Q-3

Significant dust formed in SN1987A starting around day 200, and by day 1000, the bolometric fluxes of the nebula was dominated by dust radiation with a temperature of T$\_{dust}$ $\sim$ 200K, and mid-IR line emission. The last 20$\micron$ detection was nearly 10 years ago, and the last 10$\micron$ detection was 5 years ago. In this proposal, we propose observations which should allow us to estimate the dust temperature, and thus the bolometric luminosity of the mid-IR emission. We will also look for significant PAH emission, which could complicate the interpretation of the ratio of the 10$\micron$ to 20$\micron$ fluxes as simple function of the temperature