BURST AND PERSISTENT EMISSION PROPERTIES DURING THE RECENT ACTIVE EPISODE OF THE ANOMALOUS X-RAY PULSAR 1E 1841-045

Journal Article · Mon Oct 10 04:00:00 EDT 2011 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/740/1/L16· OSTI ID:21565401

Lin, Lin ^[1]; Kouveliotou, Chryssa ^[2]; Goegues, Ersin; Kaneko, Yuki ^[3]; Van der Horst, Alexander J ^[4]; Watts, Anna L; Van der Klis, Michiel ^[5]; Baring, Matthew G ^[6]; Woods, Peter M ^[7]; Barthelmy, Scott; Gehrels, Neil; Mcenery, Julie ^[8]; Michael Burgess, James; Chaplin, Vandiver; Goldstein, Adam; Guiriec, Sylvain; Preece, Robert D ^[9]; Granot, Jonathan ^[10]; Tierney, David ^[11]

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1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)
2. Space Science Office, VP62, NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States)
3. Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli-Tuzla, Istanbul 34956 (Turkey)
4. Universities Space Research Association, NSSTC, Huntsville, AL 35805 (United States)
5. Astronomical Institute 'Anton Pannekoek', University of Amsterdam, 1090 GE Amsterdam (Netherlands)
6. Department of Physics and Astronomy, Rice University, MS-108, Houston, TX 77251 (United States)
7. Corvid Technologies, Huntsville, AL 35806 (United States)
8. NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
9. CSPAR, University of Alabama in Huntsville, Huntsville, AL 35805 (United States)
10. Centre for Astrophysics Research, University of Hertfordshire, Hatfield, Herts AL10 9AB (United Kingdom)
11. School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland)

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 {sub 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{sup 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.

• OSTI ID: 21565401
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 740; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COSMIC RADIATION
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY BURSTS
COSMIC X-RAY SOURCES
ELECTROMAGNETIC RADIATION
EMISSION
IONIZING RADIATIONS
PRIMARY COSMIC RADIATION
PULSARS
RADIATIONS
X RADIATION