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Mohamed, K; Sonbas, E; Dhuga, K S; Göğüş, E; Tuncer, A; Abd Allah, N N; Ibrahim, A
Monthly notices of the Royal Astronomical Society. Letters, 03/2021, Letnik: 502, Številka: 1Journal Article
ABSTRACT Similar to black hole X-ray binary transients, hysteresis-like state transitions are also seen in some neutron-star X-ray binaries. Using a method based on wavelets and light curves constructed from archival Rossi X-ray Timing Explorer observations, we extract a minimal timescale over the complete range of transitions for 4U 1608-52 during the 2002 and 2007 outbursts and the 1999 and 2000 outbursts for Aql X-1. We present evidence for a strong positive correlation between this minimal timescale and a similar timescale extracted from the corresponding power spectra of these sources.
