094253

Constraining the population of intermediate black holes (IMBHs) can help solveone of the long-standing problems in modern astrophysics the origin ofsupermassive black holes (SMBHs). Among the 305 optically selected IMBHcandidates (3e4<MBH<2e5 MSun) published to date which reside in galaxy centersand appear as weak type-I AGN only 24 are confirmed in X-rays and 23 more areawaiting confirmation with Chandra. We propose an XMM-Newton fulfil program for40 IMBH candidates to probe lower Eddington rates and BHs residing in non-dwarfhost galaxies. Our program will help to understand the masses of black holeseeds. This proposal was accepted in AO-22 but no observations have been madeas of Oct/2023. [truncated! Please see actual data for full text]