092164

The local Seyfert 2 galaxy MCG+11-11-032 has been suggested as the possible hostof a sub-pc supermassive black hole binary (SMBHB) based on a tantalizing buttentative detection of a double-peaked Fe K line feature in its Swift-XRTspectrum. The observation of a double Fe line could be a powerful method forSMBHB detection and characterization but because of the low SNR of the XRTdata its nature requires confirmation. We propose to use the unique highsensitivity and spectral resolution of XMM at 6 keV to robustly examine thisfeature. This program could for the first time confirm an SMBHB through its FeK emission and pave the way for future studies which will have importantimplications for observing the electromagnetic signatures of SMBHBs in the gravitational-wave emitting regime. [truncated! Please see actual data for full text]