Astronomy & Astrophysics

Table 1: Timings of the outbursts in 4U 1608-52, determined from the ASM/RXTE data. $T_{\rm max}$ refers to the moment of $I_{\rm max}$ in JD-2 400 000. The epoch number and $\rm O{-}C$ (days) are calculated according to Eq. (1). $I_{\rm max}$ is expressed in ct/s. $D_{\rm out}$ is given in days.