The fading of the extraordinary low mass X-ray binary EXO 0748-676: Part II

We propose to continue monitoring the dipping lowmass Xray binary EXO 0748676as it moves into quiescence. RXTE first reported its detection at the lowestflux level since the beginning of the RXTE mission in 1996 in pointedobservations during August 2008 (ATel #1736). Swift observations in October 2008confirmed the likely cessation of accretion activity (ATel #1812). The coolingof the neutron star crust has been subsequently monitored with XMM observationsevery 4 months (this proposal, Part I). The last of these observations showsthat the cooling of the crust is still continuing. A further observation of EXO0748676 is important to determine the cooling curve of the neutron star crust,which has been heated during by more than 20virgulyears of accretion. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]