Linking the X-ray timing and spectral properties of the glitching AXP 1RXS J170849-400910

TL;DR

This study links X-ray flux, spectral properties, and glitch events in the AXP 1RXS J170849-400910, revealing a correlation between timing glitches and spectral changes through analysis of archival data.

Contribution

It provides the first detailed timing analysis correlating glitches with spectral properties in 1RXS J170849-400910, confirming predicted glitch timings and their connection to spectral behavior.

Findings

Detected two large glitches in 2005 consistent with predictions

Established a correlation between flux, spectral, and timing properties

Confirmed the connection between glitches and spectral changes

Abstract

Previous studies of the X-ray flux and spectral properties of 1RXS J170849-400910 showed hints of a possible correlation with the spin glitches that occurred in 1999 and 2001. However, due to the sparseness of spectral measurements and the paucity of detected glitches no firm conclusion could be drawn. We retrieved and analysed archival XTE pointings of 1RXS J170849-400910 covering the time interval between January 2003 and June 2006 and carried out a detailed timing analysis by means of phase fitting techniques. We detected two relatively large glitches Delta nu / nu of 1.2 and 2.1 10^-6 occurred in January and June 2005. Interestingly, the occurrence times of these glitches are in agreement with the predictions made in our previous studies. This finding strongly suggests a connection between the flux, spectral and timing properties of 1RXS J170849-400910.