  It has been recently shown that tachyonic chameleon model of dark energy in
which tachyon scalar field non-minimally coupled to the matter admits stable
scaling attractor solution that could give rise to the late-time accelerated
expansion of the universe and hence alleviate the coincidence problem. In the
present work, we use data from Type Ia supernova (SN Ia) and Baryon Acoustic
Oscillations to place constraints on the model parameters. In our analysis we
consider in general exponential and non-exponential forms for the non-minimal
coupling function and tachyonic potential and show that the scenario is
compatible with observations.
