  The Fermi Gamma Ray Burst Monitor (GBM) is an all sky gamma-ray monitor well
known in the gamma-ray burst community. Although GBM excels in detecting the
hard, bright extragalactic GRBs, its sensitivity above 8 keV and all-sky view
make it an excellent instrument for the detection of rare, short-lived Galactic
transients. In March 2010, we initiated a systematic search for transients
using GBM data. We conclude this phase of the search by presenting a 3 year
catalog of 1084 X-ray bursts. Using spectral analysis, location and spatial
distributions we classified the 1084 events into 752 thermonuclear X-ray
bursts, 267 transient events from accretion flares and X-ray pulses, and 65
untriggered gamma-ray bursts. All thermonuclear bursts have peak blackbody
temperatures broadly consistent with photospheric radius expanison (PRE)
bursts. We find an average rate of 1.4 PRE bursts per day, integrated over all
Galactic bursters within about 10 kpc. These include 33 and 10 bursts from the
ultra-compact X-ray binaries 4U~0614+09 and 2S~0918-549, respectively. We
discuss these recurrence times and estimate the total mass ejected by PRE
bursts in our Galaxy.
