2020020

Four years ago we initiated a multi-year program (AO-16-19) aimed at the creation of an ultra-deep extragalactic field centered on the M81 galaxy. We are requesting a continuation of the program in AO-20 to further improve the sensitivity in this field. This ultra-deep field will become INTEGRALs legacy for studies of the AGN population at hard X-ray fluxes as low as 2x10^-12 erg s^-1 cm^-2 and will provide a ground for the unique synergy of INTEGRAL with the all-sky X-ray surveys by the eROSITA and ART-XC telescopes on board the SRG which has already covered the entire sky four times. This field also opens up an unprecedented view on transient energetic events such as FRBs ULXs etc. occurring in the nearby group of galaxies.We are asking for 2.5Ms of observations to be performed in the AO-20. [truncated! Please see actual data for full text]