iPTF14yb: The First Discovery of a GRB Afterglow Independent of a High-Energy Trigger

S. Bradley Cenko, Alex L. Urban, Daniel A. Perley +34

We report here the discovery by the Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous ($M_r\approx -27.8$ mag), cosmological (redshift 1.9733), rapidly fading…