Searching for propeller-phase ULXs in the XMM–Newton Serendipitous Source Catalogue
Searching for propeller-phase ULXs in the XMM–Newton Serendipitous Source Catalogue
We search for transient sources in a sample of ULXs from the 3XMM-DR4 release of the XMM-Newton Serendipitous Source Catalogue in order to find candidate neutron star ULXs alternating between an accreting state and the propeller regime, in which the luminosity drops dramatically. By examining their fluxes and flux upper …