Never Ignore a Coincidence: Rapid Identification of Advanced LIGO Sources with Electromagnetic Transients

When two ultra-compact objects inspiral and merge it is a rare cosmic event, resulting in ``luminous'' gravitational wave emission. It is also fleeting, staying in Advanced LIGO's current sensitive band only for at most a few minutes. But when there is at least one neutron star, disk formation during the merger may power a slew of bright electromagnetic counterparts, including short gamma-ray bursts (GRBs) and their afterglows. Here we present efforts to localize LIGO signal candidates on the sky in under a minute after detection, and to identify coincidences in time with GRBs from the \textit{Swift} and \textit{Fermi} satellites on a similar timescale. We also report on the population of \textit{Swift} and \textit{Fermi} GRBs that occurred during Advanced LIGO's first Observing Run, and discuss follow-up observations of GRB 150906B, a short-duration burst discovered by the InterPlanetary Network of satellite observatories, which may have occurred in a galaxy within LIGO's sensitive volume.