Burst and persistent emission properties during the recent active episode of the anomalous x-ray pulsar 1E 1841-045
The Swift/Burst Alert Telescope detected the first burst from 1E 1841-045 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 140 ms, comparable to other magnetar burst durations, while the energy released in each burst ranges between (0.8-25) x 10(38) erg, 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 1E 1841-045 might not involve large-scale restructuring (either crustal or magnetospheric) as seen in other magnetar sources.
Item Type | Article |
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Additional information | Copyright American Astronomical Society |
Keywords | pulsars: individual (1e 1841-045), x-rays: bursts, soft gamma-repeaters, kes 73, supernova remnant, 2002 outburst, sgr 1627-41, 4u 0142+61, magnetar, 1e-1841-045, monitor, discovery |
Date Deposited | 15 May 2025 12:15 |
Last Modified | 30 May 2025 23:47 |
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