We have compiled the most comprehensive burst sample from magnetar 4U 0142+61, comprising 27 bursts from its three burst-active episodes in 2011, 2012 and the latest one in 2015 observed with Swift/BAT and Fermi/GBM. Bursts from 4U 0142+61 morphologically resemble typical short bursts from other magnetars. However, 4U 0142+61 bursts are less energetic compared to the bulk of magnetar bursts. We uncovered an extended tail emission following a burst on 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 burst tail, or an associated and spatially coincident but different mechanism.
@article{arxiv.1611.10230,
title = {Burst and Outburst Characteristics of Magnetar 4U 0142+61},
author = {Ersin Gogus and Lin Lin and Oliver J. Roberts and Manoneeta Chakraborty and Yuki Kaneko and Ramandeep Gill and Jonathan Granot and Alexander J. van der Horst and Anna L. Watts and Matthew Baring and Chryssa Kouveliotou and Daniela Huppenkothen and George Younes},
journal= {arXiv preprint arXiv:1611.10230},
year = {2017}
}