094421

We propose observations towards a potential Pulsar/Pulsar Wind system within theultra-high-energy (UHE) gamma-ray source SNR G150.3+4.5. The source is among thePeVatron candidates sources significantly contributing to the cosmic raysdensity within our Galaxy recently published by the LHAASO air shower gamma-rayexperiment. The emission at 25-200 TeV is concentrated around a potential PSRcandidate at the south-eastern part of the SNR shell. Using between 28-104 ksobservations with XMM we will identify the counterpart of the UHE gamma-rayemission. A positive detection will establish the source as a very powerfulPSR/PWN system. In case of a non-detection the result still has importantimplications as it would suggest this source to be just the second known SNR PeVatron. [truncated! Please see actual data for full text]