Monitoring the ultraluminous X-ray sources in the nearby galaxy NGC 1313

XMMNewton has revolutionized the study of Xray sources in nearby galaxies suchas NGC 1313, a barred spiral galaxy that is 3.7 Mpc away. This contains twoultraluminous Xray sources, and SN 1978K, the first supernova remnantrecognized from its Xray flux. NGC 1313 is close enough that XMMNewton canperform detailed simultaneous spectroscopic and timing studies of all of them.In Cycle 2, we were awarded time to perform 7 Priority A observations as thefirst stage in a longterm program of monitoring the known sources, searchingfor new transients, and determining the diffuse emission component. Here we willcontinue this campaign by performing 4 more pointings of 10 ksec to study thesources on time scales ranging from seconds to months. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]