THE AFTERGLOW OF GRB 130427A FROM 1 TO 10(16) GHz

D.A.P. acknowledges a prescient conversation on 2013 April 18 with A. Collazzi in Nashville on the origin of the lack (at the time) of Fermi-LAT GRBs at z < 0.5, and comments from Y. Fan and A. van der Horst. We are grateful for excellent staff assistance at the various observatories where we obtained data. We thank B. Sesar for the execution of our P200 target-of-opportunity observations and assistance with the data reduction. J. Carpenter and CARMA provided additional DDT time to continue observations of GRB 130427A after t = 2 days, and K. Alatalo assisted with flagging and reducing these observations. We thank S. Kulkarni for the Keck/LRIS data. We would like to thank all members of the Swift and Fermi teams, whose successful missions made this work possible. The National Radio Astronomy Observatory is a facility of the NSF operated under cooperative agreement by Associated Universities, Inc. Support for CARMA construction was derived from the states of California, Illinois, and Maryland, the James S. McDonnell Foundation, the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the University of Chicago, the Associates of the California Institute of Technology, and the NSF. Ongoing CARMA development and operations are supported by the NSF under a cooperative agreement, and by the CARMA partner universities. The article contains data taken with the IRAM Plateau deBure interferometer. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain). We acknowledge the support of the Spanish Ministerio de Ciencia y Tecnología through Projects AYA2009-14000-C03-01/ESP, AYA2011-29517-C03-01, and AYA2012-39727-C03-01. KAIT and its ongoing operation were made possible by donations from Sun Microsystems, Inc., the Hewlett-Packard Company, AutoScope Corporation, Lick Observatory, the NSF, the University of California, the Sylvia and Jim Katzman Foundation, and the TABASGO Foundation. Some of the data presented herein were obtained a