The temporal evolution of the puzzling central source in RCW103

1E 1613485055 is a pointlike, radioquiet Xray source at the center of the2000yearsold supernova remnant RCW103. Recent observations unveiled a uniquephenomenology: (i) the source has a dramatic (factor 100) longterm fluxvariability with outbursts possibly recurrent on the few year time scale; (ii)its emission is strongly modulated with a puzzling 6.67 hour periodicity; (iii)no counterpart in the optical/infrared has been found yet. In view of the sourcevariability, XRT onboard Swift is currently performing a monthly monitoringcampaign. Here we ask for a new 75 ks XMM triggered observation to be performedif a new outburst will be detected. Studying the 6.67 hours periodicity in thehigh state regime will shed light on the nature of this puzzling source. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]