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Fig. 4


The model SED fit to observed YLW 16A photometry. Red circles correspond to JHK and Spitzer IRAC photometry during the bright state; blue circles correspond to the faint state. The summed model SED fit (black curve: bright state; maroon dashed curve: faint state) has contributions from a composite star (lower synthetic SEDs peaking at ~0.1 Jy; red: bright state; blue: faint state), hot dust (upper left blackbody curves peaking at a few Jy, red: bright state; blue: faint state), and cold dust (green blackbody curve). Ground-based historical 10.8 μm photometry, Spitzer MIPS 70 micron photometry and sub-mm photometry is shown as black circles (YLW 16A is saturated at 24 μm in the Spitzer c2d survey data).

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