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The MUSE view of the host galaxy of GRB 100316D
The low distance, , of GRB 100316D and its association with SN
2010bh represent two important motivations for studying this host galaxy and
the GRB's immediate environment with the Integral-Field Spectrographs like
VLT/MUSE. Its large field-of-view allows us to create 2D maps of gas
metallicity, ionization level, and the star-formation rate distribution maps,
as well as to investigate the presence of possible host companions. The host is
a late-type dwarf irregular galaxy with multiple star-forming regions and an
extended central region with signatures of on-going shock interactions. The GRB
site is characterized by the lowest metallicity, the highest star-formation
rate and the youngest ( 20-30 Myr) stellar population in the galaxy,
which suggest a GRB progenitor stellar population with masses up to 20 -- 40
. We note that the GRB site has an offset of 660pc from the
most luminous SF region in the host. The observed SF activity in this galaxy
may have been triggered by a relatively recent gravitational encounter between
the host and a small undetected ( erg/s) companion