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Repeated, Delayed Torque Variations Following X-ray Flux Enhancements in the Magnetar 1E1048.15937
R. F. Archibald, V. M. Kaspi, C. -Y. Ng +4
We report on two years of flux and spin evolution monitoring of 1E 1048.15937, a 6.5-s X-ray pulsar identified as a magnetar. Using {\it Swift} XRT data, we observed an X-ray ou…
Green Bank Telescope and Swift X-ray Telescope Observations of the Galactic Center Radio Magnetar SGR J1745-2900
Ryan S. Lynch, Robert F. Archibald, Victoria M. Kaspi +1
We present results from eight months of Green Bank Telescope 8.7-GHz observations and nearly 18 months Swift X-ray telescope observations of the radio magnetar SGR J1745-2900, whic…
Arecibo Pulsar Survey Using ALFA. III. Precursor Survey and Population Synthesis
J. K. Swiggum, D. R. Lorimer, M. A. McLaughlin +33
The Pulsar Arecibo L-band Feed Array (PALFA) Survey uses the ALFA 7-beam receiver to search both inner and outer Galactic sectors visible from Arecibo ($32^{\circ}\lesssim \ell \le…
The long-term post-outburst spin down and flux relaxation of magnetar Swift J1822.31606
P. Scholz, V. M. Kaspi, A. Cumming
The magnetar Swift J1822.31606 entered an outburst phase in 2011 July. Previous X-ray studies of its post-outburst rotational evolution yielded inconsistent measurements of the…
On the X-ray variability of magnetar 1RXS J170849.0-400910
P. Scholz, R. F. Archibald, V. M. Kaspi +4
We present a long-term X-ray flux and spectral analysis for 1RXS J170849.0-400910 using Swift/XRT spanning over 8 years from 2005-2013. We also analyze two observations from Chandr…