Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.409l..74s&link_type=abstract
Monthly Notices of the Royal Astronomical Society: Letters, Volume 409, Issue 1, pp. L74-L78.
Astronomy and Astrophysics
Astronomy
1
Gamma-Ray Burst: Individual: Grb031203, Gamma-Ray Burst: Individual: Grb060218, Gamma-Ray Burst: Individual: Grb060614, Gamma-Ray Burst: Individual: Grb020819, Gamma-Ray Burst: Individual: Grb990712, Radio Continuum: Galaxies
Scientific paper
We present 5.5- and 9.0-GHz observations of five gamma-ray burst host galaxies at z < 0.5, taken using the Australia Telescope Compact Array. We determine tight constraints on the radio continuum flux of four sources (GRB hosts 060218, 060614, 020819 and 990712) and detect a fifth source, the host of GRB031203, with a flux density Fν(5.50GHz) = 216 +/- 50μJy. We discuss the star formation rates of all five sources. Our radio-derived star formation rates (and upper limits) are largely consistent with those derived from optical observations, suggesting either that there is little dust-obscured star formation in these sources, or that their starbursts are too young to have established representative radio continuum emission.
Davies Luke J. M.
Levan Andrew J.
Stanway Elizabeth R.
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