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.
| Original language | English |
|---|---|
| Article number | L16 |
| Journal | Astrophysical Journal Letters |
| Volume | 740 |
| Issue number | 1 |
| DOIs | |
| State | Published - 10 Oct 2011 |
| Externally published | Yes |
Keywords
- X-rays: bursts
- pulsars: individual (1E 1841-045)
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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