Bulk properties of the nuclear transients

Recent researches in the field of 'time-domain astronomy' have revealed several new types of transients near the centers (< 1Kpc) of the galaxies. Most of them are brighter than canonical supernovae and exhibit very broad lightcurves with almost featureless spectra at early stages. They are spatially unresolved from the hosts' centers, and probably either tidal disruptions of solar-mass stars (TDE) by the supermassive black holes (SMBH), or luminous supernovae (SNe) at the circumnuclear disk. The improved transient survey facilities (e.g., iPTF/ZTF, ATLAS, ASAS-SN) have discovered several such candidates in the last couple of years. Some of them are Optically-bright but was not detected in X-ray, while others are X-ray bright but optically faint and occasionally luminous in Radio. Only few have been found to be bright in both optical and X-ray. In this contribution, I will summarize the observed multi-wavelength properties of such nuclear-transients, effect of explosion geometries on the observed properties and the bulk natures of their hosts. In this context, I will also highlight the unique properties of two archetypal optically-bright TDEs - iPTF15dof and AT2019ahk which have been observed using SALT and also by other collaborations like iPTF, ePESSTO+, and GSP/LCO.