The workshop (Task 2.3.12), second in a series, focusses on identifying and developing potential scientific synergies between the Athena X-ray observatory mission (ESA)  and GW/v’s/HE/GRB facilities that will be operational contemporary to Athena.

The goal is to produce the White Paper that should address the scientific topics where the synergetic use of Athena and the key multimessenger facilities operating at the end of this decade will result in a scientific added value.