091309

We propose to observe one extremely luminous and hard ultraluminous X-ray source NGC 4254 X2 simultaneously with NuSTAR and XMM to study its broadband spectral properties for the first time and search for pulsation in the new high S/N data. The source is well isolated from other X-ray sources but has received very little observational attention so far and hence the broadband spectral features of this source are still unknown. Analysis of archival soft X-ray data suggests that this source is a potential pulsar ULX candidate. New broadband data can potentially confirm this prediction while constraining the physical parameters related to the accretion. [truncated! Please see actual data for full text]