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We use Spitzer data to infer that the small infrared excess of V819 Tau, aweak-lined T Tauri star in Taurus, is real and not attributable to a"companion" 10 arcsec to the south. We do not confirm the mid-infrared excessin HBC 427 and V410 X-ray 3, which are also non-accreting T Tauri stars in thesame region; instead, for the former object, the excess arises from a redcompanion 9 arcsec to the east. A single-temperature blackbody fit to thecontinuum excess of V819 Tau implies a dust temperature of 143 K; however, abetter fit is achieved when the weak 10 and 20 micron silicate emissionfeatures are also included. We infer a disk of sub-micron silicate grainsbetween about 1 AU and several 100 AU with a constant surface densitydistribution. The mid-infrared excess of V819 Tau can be successfully modeledwith dust composed mostly of small amorphous olivine grains at a temperature of85 K, and most of the excess emission is optically thin. The disk could stillbe primordial, but gas-poor and therefore short-lived, or already at the debrisdisk stage, which would make it one of the youngest debris disk systems known.

V819 Tau: A Rare Weak-Lined T Tauri Star with a Weak Infrared Excess