Burst and Outburst Characteristics of Magnetar 4U 0142+61

We have compiled the most comprehensive burstsample from magnetar4U 0142+61, comprising 27 burstsfrom its three burst-active episodes in 2011, 2012 and the latest one in 2015 observed with Swift/BAT and Fermi/GBM. Burstsfrom 4U 0142+61 morphologically resemble typical short burstsfrom other magnetars. However, 4U 0142+61 burstsare less energetic compared to the bulk of magnetar bursts. We uncovered an extended tail emission following a burston 2015 February 28, with a thermal nature, cooling over a time-scale of several minutes. During this tail emission, we also uncovered pulse peak phase aligned X-ray bursts, which could originate from the same underlying mechanism as that of the extended bursttail, or an associated and spatially coincident but different mechanism.