The focus of this informal (*) meeting will be gravitational wave (GW) and electromagnetic (EM) signatures of massive black hole binaries (MBHBs) and extreme/intermediate mass-ratio inspirals (EMRIs/IMRIs). This meeting will be run in the style of all previous Astro-GR meetings, with presentations in the morning and discussion/working groups in the afternoon.

When LISA flies, it will provide us with an opportunity to detect gravitational waves from high redshift sources (z~20). Observations of MBHBs could provide invaluable information on galaxy formation models, while EMRI observations could provide information on the strong field regime around a Kerr black hole. As LISA will be a precision tool determining when a possible merger may take place, it is important that the astrophysical and data analysis communities work hand in hand.

The main topics of interest for the meeting will be:

• Astrophysical modelling of EM/GW sources
• Modelling of strong field sources within General Relativity
• LISA Data analysis
• Early warning of possible mergers either from the data analysis or by EM detection

for MBHBs, EMRIs and IMRIs.

(*) Informal means: no registration fee, poster presentation, or proceedings. Also financial assistance to participants for the meeting can not be provided.