GRB 090426: The environment of a rest-frame 0.35-s gamma-ray burst at a redshift of 2.609

Emily M. Levesque, Joshua S. Bloom, Nathaniel R. Butler, Daniel A. Perley, S. Bradley Cenko, J. Xavier Prochaska, Lisa J. Kewley, Andrew Bunker, Hsiao Wen Chen, Ryan Chornock, Alexei V. Filippenko, Karl Glazebrook, Sebastian Lopez, Joseph Masiero, Maryam Modjaz, Adam Morgan, Dovi Poznanski