Searching for X-ray Variability in the Glitching Anomalous X-ray Pulsar 1E 1841-045 in Kes 73

Abstract

Anomalous X-ray Pulsars (AXPs) are now established to exhibit significant X-ray variability and be prolific glitchers, with some glitches being accompanied by large radiative changes. An open issue is whether AXP glitches are generically accompanied by radiative changes, relevant for understanding magnetar physical properties. Here we report on an analysis of archival X-ray data from the AXP 1E~1841$-$045, obtained between 1993 and 2007. This AXP, located in the center of SNR Kes~73, has exhibited three glitches between 2002 and 2007, as determined by {\it RXTE} monitoring since 1999. We have searched for evidence of phase-averaged flux variability that could be present if glitches in AXPs are usually accompanied by radiative changes. We find no evidence for glitch-correlated flux changes from this source, arguing that such behavior is not generic to AXPs.

16 pags, 3 tables, 2 figures, submitted to ApJ.

References in corpus (8)

• The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
• Resonant cyclotron scattering in magnetars' emission
• Recent Progress on Anomalous X-ray Pulsars
• X-ray and Near-IR Variability of the Anomalous X-ray Pulsar 1E 1048.1-5937: From Quiescence Back to Activity
• Swift and Chandra confirm the intensity-hardness correlation of the AXP 1RXS J170849.0-400910
• Linking the X-ray timing and spectral properties of the glitching AXP 1RXS J170849-400910
• Long term hard X-ray variability of the anomalous X-ray pulsar 1RXS J170849.0-400910 discovered with INTEGRAL
• Suzaku Observation of AXP 1E 1841-045 in SNR Kes 73

Cited by in corpus (2)

• Deep NuSTAR and Swift Monitoring Observations of the Magnetar 1E 1841-045
• A glitch and an anti-glitch in the anomalous X-ray pulsar 1E 1841-045