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Monitoring observations of SMC X-1's excursions (MOOSE)-II: A new excursion accompanies spin-up acceleration
Chin-Ping Hu, Kristen C. Dage, William I. Clarkson +11
SMC X-1 is a high-mass X-ray binary showing superorbital modulation with an unstable period. Previous monitoring shows three excursion events in 1996--1998, 2005--2007, and 2014--2…
Monitoring Observations of SMC X-1's Excursions (MOOSE) I: Program Description and Initial High-State Spectral Results
Kristen C. Dage, McKinley Brumback, Joey Neilsen +8
SMC X-1 has exhibited three super-orbital period excursions since the onset of X-ray monitoring beginning with RXTE's launch in 1995. NICER has recently probed a fourth observed ex…
Longterm properties of accretion discs in X-ray Binaries - III. A search for spin-superorbital correlation in SMC X-1
Kristen C. Dage, William I. Clarkson, Philip A. Charles +2
Thanks to long-term X-ray monitoring, a number of interacting binaries are now known to show X-ray periodicities on timescales of tens to hundreds of binary orbits. In some systems…