Computer Science
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30779m&link_type=abstract
Spitzer Proposal ID #30779
Computer Science
Scientific paper
A number of blazars have very high gamma-ray to IR apparent luminosity ratios, in some cases exceeding 100. While this might be the result of extreme relativistic beaming of inverse-Compton scattered radiation, the success of this model relies on the presence of a compact torus of hot dust surrounding the central engine. We propose to observe four gamma-ray bright blazars with MIPS, IRS, and IRAC in order to measure the spectral energy distribution in an effort to reveal thermal emission components from dust tori. Because the IR continuum is variable, we need two complete sets of SST observations, one in each of two visibility periods, in order to measure and subtract the time-variable, nonthermal component using an established procedure. Further subtraction of a quasi-steady synchrotron component, if present, will reveal the presence of graybody humps or silicate emission features corresponding to hot or cool dust.
Jorstad Svetlana
Marscher Alan
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