  Since launch in 2008, the Fermi Gamma-ray Burst Monitor (GBM) has detected
many hundreds of bursts from magnetar sources. While the vast majority of these
bursts have been attributed to several known magnetars, there is also a small
sample of magnetar-like bursts of unknown origin. Here we present the Fermi/GBM
magnetar catalog, giving the results of the temporal and spectral analyses of
440 magnetar bursts with high temporal and spectral resolution. This catalog
covers the first five years of GBM magnetar observations, from July 2008 to
June 2013. We provide durations, spectral parameters for various models,
fluences and peak fluxes for all the bursts, as well as a detailed temporal
analysis for SGR J1550-5418 bursts. Finally, we suggest that some of the bursts
of unknown origin are associated with the newly discovered magnetar 3XMM
J185246.6+0033.7.
