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Burst and Persistent Emission Properties during the Recent Active Episode of the Anomalous X-Ray Pulsar 1E 1841-045
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2011 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 740, no 1Article in journal (Refereed) Published
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Abstract [en]

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) × 1038 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.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2011. Vol. 740, no 1
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Astronomy, Astrophysics and Cosmology
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URN: urn:nbn:se:kth:diva-184467DOI: 10.1088/2041-8205/740/1/L16ISI: 000295210900016Scopus ID: 2-s2.0-80053530534OAI: oai:DiVA.org:kth-184467DiVA: diva2:916022
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QC 20160405

Available from: 2016-03-31 Created: 2016-03-31 Last updated: 2016-04-05Bibliographically approved

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Publisher's full textScopushttp://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ApJ...740L..16L&link_type=EJOURNAL

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Burgess, James Michael
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