  The effect of the recently obtained 2nd post-Newtonian corrections on the
accuracy of estimation of parameters of the gravitational-wave signal from a
coalescing binary is investigated. It is shown that addition of this correction
degrades considerably the accuracy of determination of individual masses of the
members of the binary. However the chirp mass and the time parameter in the
sinal is still determined to a very good accuracy. The performance of the
Newtonian filter is investigated and it is compared with performance of
post-Newtonian search templates introduced recently. It is shown that both
search templates can extract accurately useful information about the binary.
