A Spatially Resolved Study of the GRB 020903 Host Galaxy
  GRB 020903 is a long-duration gamma ray burst (LGRB) with a host galaxy close
enough and extended enough for spatially-resolved observations, making it one
of less than a dozen GRBs where such host studies are possible. GRB 020903 lies
in a galaxy host complex that appears to consist of four interacting
components. Here we present the results of spatially-resolved spectroscopic
observations of the GRB 020903 host. By taking observations at two different
position angles we were able to obtain optical spectra (3600-9000{\AA}) of
multiple regions in the galaxy. We confirm redshifts for three regions of the
host galaxy that match that of GRB 020903. We measure metallicity of these
regions, and find that the explosion site and the nearby star-forming regions
both have comparable sub-solar metallicities. We conclude that, in agreement
with past spatially-resolved studies of GRBs, the GRB explosion site is
representative of the host galaxy as a whole rather than localized in a
metal-poor region of the galaxy.
