Abstract:
In this paper, we present multi-band photometric observations and analysis of the host galaxies for a
sample of five interesting gamma-ray bursts (GRBs) observed using the 3.6m Devasthal optical telescope (DOT)
and the back-end instruments. The host galaxy observations of GRBs provide unique opportunities to estimate
the stellar mass, ages, star-formation rates and other vital properties of the burst environments and hence,
progenitors. We performed a detailed spectral energy distribution (SED) modeling of the five host galaxies
using an advanced tool called Prospector, a stellar population synthesis model. Furthermore, we compared
the results with a larger sample of well-studied host galaxies of GRBs, supernovae and normal star-forming
galaxies. Our SED modeling suggests that GRB 130603B, GRB 140102A, GRB 190829A and GRB 200826A
have massive host galaxies with high star-formation rates (SFRs). On the other hand, a supernovae-connected
GRB 030329 has a rare low-mass galaxy with a low star-formation rate. We also find that GRB 190829A has the
highest (in our sample) amount of visual dust extinction and gas in its local environment of the host, suggesting
that the observed very high-energy emission from this burst might have a unique local environment. Broadly,
the five GRBs in our sample satisfy the typical correlations between host galaxies parameters and these physical
parameters are more common to normal star-forming galaxies at the high-redshift Universe. Our results also
demonstrate the capabilities of 3.6m DOT and the back-end instruments for the deeper photometric studies of
the host galaxies of energetic transients, such as GRBs, supernovae and other transients in the long run.
