  We present analysis of the far ultraviolet (FUV) emission of sources in the
central region of the Coma cluster (z=0.023) using the data taken by the UVIT
aboard the multi-wavelength satellite mission AstroSat. We find a good
correlation between the UVIT FUV flux and the fluxes in both wavebands of the
Galex mission, for the common sources. We detect stars and galaxies, amongst
which the brightest (r <= 17 mag) galaxies in the field of view are mostly
members of the Coma cluster. We also detect three quasars (z = 0.38, 0.51,
2.31), one of which is likely the farthest object observed by the UVIT so far.
In almost all the optical and UV colour-colour and colour-magnitude planes
explored in this work, the Coma galaxies, other galaxies and bright stars could
be separately identified, but the fainter stars and quasars often coincide with
the faint galaxies. We have also investigated galaxies with unusual FUV
morphology which are likely to be galaxies experiencing ram-pressure stripping
in the cluster. Amongst others, two confirmed cluster members which were not
investigated in the literature earlier, have been found to show unusual FUV
emission. All the distorted sources are likely to have fallen into the cluster
recently, and hence have not virialised yet. A subset of our data have optical
spectroscopic information available from the archives. For these sources (~ 10%
of the sample), we find that 17 galaxies identify as star-forming, 18 as
composite and 13 as host galaxies for active galactic nuclei, respectively on
the emission-line diagnostic diagram.
