  In recent times, 3.6m Devasthal Optical Telescope (DOT) has installed an
optical to near infra-red spectrograph, TANSPEC, which provides spectral
coverage from 0.55-2.5 microns. Using TANSPEC, we have obtained a single epoch
spectrum of a set 9 FUors and EXors. We have analysed line profiles of the
sources and compared with the previously published spectra of these objects.
Comparing the line profile shapes with the existing theoretical predictions, we
have tried to interpret the physical processes that are responsible for the
current disc evolution and the present accretion dynamics. Our study has shown
the importance for time evolved spectroscopic studies for better understanding
the evolution of the accretion mechanisms. This in turn can help in better
categorisation of the young stars displaying episodic accretion behaviour.
