%0 Generic %1 mcguire2015detection %A McGuire, J. T. W. %A Tanvir, N. R. %A Levan, A. J. %A Trenti, M. %A Stanway, E. R. %A Shull, J. M. %A Wiersema, K. %A Perley, D. A. %A Starling, R. L. C. %A Bremer, M. %A Stocke, J. T. %A Hjorth, J. %A Rhoads, J. E. %A Levesque, E. M. %A Robertson, B. %A Fynbo, J. P. U. %A Ellis, R. S. %A Fruchter, A. S. %A Perna, R. %D 2015 %K galaxy grb high-z host %T Detection of three Gamma-Ray Burst host galaxies at $z\sim6$ %U http://arxiv.org/abs/1512.07808 %X Gamma-ray bursts allow us to pinpoint and study star-forming galaxies in the early universe, thanks to their immense luminosities and association with deaths of massive stars. We present Hubble Space Telescope Wide Field Camera 3 detections of three Swift GRBs lying at redshifts $z = 5.913$ (GRB 130606A), $z = 6.295$ (GRB 050904), and $z = 6.327$ (GRB 140515A) in the F140W (wide-$JH$ band, $łambda_obs\sim1.4\,m$) filter. The hosts have magnitudes (corrected for Galactic extinction) of $m_łambda_obs,AB= 26.26^+0.12_-0.14, 27.63^+0.16_-0.18,$ and $28.23^+0.24_-0.30$ respectively. In all three cases the probability of chance coincidence of lower redshift galaxies is $łesssim1.5\%$, indicating that the detected galaxies are most likely the GRB hosts. These are the first detections of high redshift ($z > 5$) GRB host galaxies in emission. The galaxies have luminosities in the range $0.1-0.7\,L^*_z=6$ (with $M_1600^*=-20.95\pm0.12$), along with half-light radii in the range $0.6-1.2\,kpc$. Both their half-light radii and luminosities are consistent with existing samples of Lyman-break galaxies at $z\sim6$. Spectroscopic analysis of the GRB afterglows indicate low metallicities ($M/Hłesssim-1$) and dust extinction ($A_Vłesssim0.1$) along the line of sight. We consider the implications of these luminosities for their possible star formation histories and the potential for emission line metallicity determinations with James Webb Space Telescope spectroscopy.

@misc{mcguire2015detection, abstract = {Gamma-ray bursts allow us to pinpoint and study star-forming galaxies in the early universe, thanks to their immense luminosities and association with deaths of massive stars. We present {\em Hubble Space Telescope} Wide Field Camera 3 detections of three {\em Swift} GRBs lying at redshifts $z = 5.913$ (GRB 130606A), $z = 6.295$ (GRB 050904), and $z = 6.327$ (GRB 140515A) in the F140W (wide-$JH$ band, $\lambda_{\rm{obs}}\sim1.4\,\mu m$) filter. The hosts have magnitudes (corrected for Galactic extinction) of $m_{\rm{\lambda_{obs},AB}}= 26.26^{+0.12}_{-0.14}, 27.63^{+0.16}_{-0.18},$ and $28.23^{+0.24}_{-0.30}$ respectively. In all three cases the probability of chance coincidence of lower redshift galaxies is $\lesssim1.5\%$, indicating that the detected galaxies are most likely the GRB hosts. These are the first detections of high redshift ($z > 5$) GRB host galaxies in emission. The galaxies have luminosities in the range $0.1-0.7\,L^{*}_{z=6}$ (with $M_{1600}^{*}=-20.95\pm0.12$), along with half-light radii in the range $0.6-1.2\,\rm{kpc}$. Both their half-light radii and luminosities are consistent with existing samples of Lyman-break galaxies at $z\sim6$. Spectroscopic analysis of the GRB afterglows indicate low metallicities ($[\rm{M/H}]\lesssim-1$) and dust extinction ($A_{\rm{V}}\lesssim0.1$) along the line of sight. We consider the implications of these luminosities for their possible star formation histories and the potential for emission line metallicity determinations with {\em James Webb Space Telescope} spectroscopy.}, added-at = {2015-12-25T10:26:07.000+0100}, author = {McGuire, J. T. W. and Tanvir, N. R. and Levan, A. J. and Trenti, M. and Stanway, E. R. and Shull, J. M. and Wiersema, K. and Perley, D. A. and Starling, R. L. C. and Bremer, M. and Stocke, J. T. and Hjorth, J. and Rhoads, J. E. and Levesque, E. M. and Robertson, B. and Fynbo, J. P. U. and Ellis, R. S. and Fruchter, A. S. and Perna, R.}, biburl = {https://www.bibsonomy.org/bibtex/269a73bfb8f5f11189a5ec32a04101a71/miki}, description = {[1512.07808] Detection of three Gamma-Ray Burst host galaxies at $z\sim6$}, interhash = {89cdd867cef32d7d7b75043a0a246b31}, intrahash = {69a73bfb8f5f11189a5ec32a04101a71}, keywords = {galaxy grb high-z host}, note = {cite arxiv:1512.07808Comment: 9 pages, 5 figures, 3 tables}, timestamp = {2015-12-25T10:26:07.000+0100}, title = {Detection of three Gamma-Ray Burst host galaxies at $z\sim6$}, url = {http://arxiv.org/abs/1512.07808}, year = 2015 }