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

Lin Lin, Chryssa Kouveliotou, Ersin Gogus, Alexander J. van der Horst, Anna L. Watts, Matthew G. Baring, Yuki Kaneko, Ralph A. M. J. Wijers, Peter M. Woods, Scott Barthelmy, James Michael Burgess, Vandiver Chaplin, Neil Gehrels, Adam Goldstein, Jonathan Granot, Sylvain Guiriec, Julie Mcenery, Robert D. Preece, David Tierney, Michiel van der KlisAndreas von Kienlin, Shuang Nan Zhang

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Abstract

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.

Original languageEnglish
Article numberL16
Pages (from-to)-
Number of pages6
JournalAstrophysical Journal Letters
Volume740
Issue number1
DOIs
Publication statusPublished - 10 Oct 2011

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

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