with a recurrence time of $\sim 2.5$ yr; after 1998, outbursts occurred again in 2000, 2002, 2005 and 2008. The accretion rate increases steeply in the first 2–5 days of the outburst (*fast rise*), then it stays relatively high for a few days (*peak*), reaching at most a few percent of the Eddington rate. After this, the X-ray flux has a *slow decay* lasting $\sim$ 10 days, before entering a *fast decay* stage in which the flux drops in 3–5 days. The source then enters a low flux state characterized by 3–5 day flares separated by intervals of very low luminosity, the *re-flaring* state that can last for months, followed by *quiescence*.

J1808 has shown 401 Hz pulsations during all the outbursts, at all the luminosities observable by [[*RXTE*]{}]{} ($\simgreat
10^{34}\rm\,erg\,s^{-1}$), even during the re-flares [@har08; @har09]. The re-flaring state was observed to last $\sim60$ days (MJD $53550-53610$) in the 2005 outburst, followed by a low luminosity state approximately 10 times brighter than quiescence that lasted for another $\sim 60$ days [@cam08]. In the 1998 outburst the [[*RXTE*]{}]{} observations stopped immediately after the beginning of the re-flares, while in the 2000 outburst, only the re-flaring state was observed (for $\sim 