99 citations · 143 across the 4 of their papers we have counts for
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astro-ph2004★ 25 cited
Chandra Observations and Monte Carlo Simulations of the Grain-Scattered Halo of the Binary X-Ray Pulsar 4U 1538-52
George W. Clark
Properties of the X-ray halo of the eclipsing X-ray pulsar 4U 1538-52 are derived from a 25 ksec observation by the Chandra X-Ray Observatory. Profiles of the halo, compiled in two…
astro-ph1999★ 15 cited
An X-Ray Spectroscopic Study of the SMC X-1/Sk 160 System
Patrick S. Wojdowski, George W. Clark, Timothy R. Kallman
We have investigated the composition and distribution of the wind of Sk 160, the supergiant companion of the X-ray star SMC X-1, by comparing an X-ray spectrum of the source, obtai…
astro-ph1998★ 99 cited
Quasi-Periodic Occultation by a Precessing Accretion Disk and Other Variabilities of SMC X-1
P. S. Wojdowski, G. W. Clark, A. M. Levine +2
We have investigated the variability of the binary X-ray pulsar, SMC X-1, in data from several X-ray observatories. We confirm the ~60-day cyclic variation of the X-ray flux in the…