Correlated optical/X-ray long-term variability in LMXB 4U 1636-536
We have conducted a 3-month programme of simultaneous optical, soft and hard X-ray monitoring of the LMXB 4U 1636-536/V801 Ara using the SMARTS 1.3-m telescope...
Correlated optical/X-ray variability in the high-mass X-ray binary SAX J2103.5+4545
SAX J2103.5+4545 is the Be/X-ray binary (BeX) with the shortest orbital period. It shows extended bright and faint X-ray states that last for a few hundred days...