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Interpretation of the 115 Day Periodic Modulation in the X-ray Flux of NGC 5408 X-1
Deatrick Foster, Phil Charles, Kelly Holley-Bockelmann
We comment on the recent observation of a 115-day modulation in the X-ray flux of the ultraluminous X-ray source (ULX) NGC 5408 X-1, and in particular, the interpretation of this m…
Correlated Optical/X-ray Long-term Variability in LMXB 4U1636-536
I. C. Shih, P. A. Charles, R. Cornelisse
We have conducted a 3-month program of simultaneous optical, soft and hard X-ray monitoring of the LMXB 4U1636-536/V801 Ara using the SMARTS 1.3m telescope and archival RXTE/ASM an…
Observations of the quiescent X-ray transients GRS 1124-684 (=GU Mus) and Cen X-4 (=V822 Cen) taken with ULTRACAM on the VLT
T. Shahbaz, V. S. Dhillon, T. R. Marsh +3
We present high time-resolution multicolour optical observations of the quiescent X-ray transients GRS1124-684 (=GU Mus) and Cen X-4 (=V822 Cen) obtained with ULTRACAM. Superimpose…