090209

The detection of pulsating ultraluminous X-ray sources (PULXs) has led to a paradigm shift for the field the key questions now revolve around the demographics of ULXs (black holes vs neutron stars) and the details of their accretion physics. The detection of more PULXs is critical to answering both questions. We have therefore mined the first eROSITA all-sky survey (eRASS1) with the intention of finding new PULX candidates. Here we propose a 30 ks observation of a new extreme ULX (L(X) and amp amp amp gt 10^40 erg/s) detected in each of eRASS1 2 and 3 with a high enough flux to make sensitive accelerated pulsation searches very viable and thus determine whether it is a PULX. [truncated! Please see actual data for full text]