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We present a long-term X-ray flux and spectral analysis for 1RXSJ170849.0-400910 using Swift/XRT spanning over 8 years from 2005-2013. We alsoanalyze two observations from Chandra and XMM in the period from 2003-2004. Inthis 10-yr period, 1RXS J170849.0-400910 displayed several rotational glitches.Previous studies have claimed variations in the X-ray emission associated withsome of the glitches. From our analysis we find no evidence for significantX-ray flux variations and evidence for only low-level spectral variations. Wealso present an updated timing solution for 1RXS J170849.0-400910, from RXTEand Swift observations, which includes a previously unreported glitch at MJD56019. We discuss the frequency and implications of radiatively quiet glitchesin magnetars.

On the X-ray variability of magnetar 1RXS J170849.0-400910