DG Tau and its jet in time

The classical T Tauri star DG Tau drives a spectacular jet which contains plasmawith temperatures ranging from 10^4 to >10^6 K within the innermost 50 AU.Although, the luminosity of the jet related Xray emission varies by almost afactor of two within six years, no propermotion could be observed as for theouter emission regions of the jet. We propose to monitor the luminosityevolution with two 25 ks exposures in order to derive the timescale on whichsuch variations occur. With the large multiwavelength campaign currentlyunderway, this represents the unique chance to relate the evolution of the softXray emission with other jet tracers and thus to decide whether the Xrayemission is connected to the optically observed outflow of only 10^4 K. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]