Burst and persistent emission properties during the recent active episode of the anomalous X-ray pulsar 1E 1841-045

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Abstract

The Swift/Burst Alert Telescope detected the first burst from 1E1841-045 in 2010 May with intermittent burst activity recorded through at least 2011 July. Here we present Swift and Fermi/Gamma-ray Burst Monitor observations of this burst activity and search for correlated changes to the persistent X-ray emission of the source. The T 90 durations of the bursts range between 18 and 140ms, comparable to other magnetar burst durations, while the energy released in each burst ranges between (0.8-25) × 10 38erg, which is on the low side of soft gamma repeater bursts. We find that the bursting activity did not have a significant effect on the persistent flux level of the source. We argue that the mechanism leading to this sporadic burst activity in 1E1841-045 might not involve large-scale restructuring (either crustal or magnetospheric) as seen in other magnetar sources. © 2011. The American Astronomical Society. All rights reserved.

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Lin, L., Kouveliotou, C., Göĝüş, E., Van Der Horst, A. J., Watts, A. L., Baring, M. G., … Zhang, S. N. (2011). Burst and persistent emission properties during the recent active episode of the anomalous X-ray pulsar 1E 1841-045. Astrophysical Journal Letters, 740(1). https://doi.org/10.1088/2041-8205/740/1/L16

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