  The performance of the ultraviolet telescope (UVIT) on-board ASTROSAT is
reported. The performance in orbit is also compared with estimates made from
the calibrations done on the ground. The sensitivity is found to be within ~15%
of the estimates, and the spatial resolution in the NUV is found to exceed
significantly the design value of 1.8 arcsec and it is marginally better in the
FUV. Images obtained from UVIT are presented to illustrate the details revealed
by the high spatial resolution. The potential of multi-band observations in the
ultraviolet with high spatial resolution is illustrated by some results.
