BELFIORE A.

Modern soft X-ray observatories can yield unique insights into time domain astrophysics, and a huge amount of information is stored – and largely unexploited – in data archives. Like a treasure-hunt, the EXTraS project harvested the hitherto unexplored temporal domain information buried in the serendipitous data collected by the European Photon...

Modern soft X-ray observatories can yield unique insights into time domain astrophysics, and a huge amount of information is stored – and largely unexploited – in data archives. Like a treasure-hunt, the EXTraS project harvested the hitherto unexplored temporal domain information buried in the serendipitous data collected by the European Photon...

We performed a search for eclipsing and dipping sources in the archive of the EXTraS project - a systematic characterization of the temporal behavior of XMM-Newton point sources. We discovered dips in the X-ray light curve of 3XMM J004232.1+411314, which has been recently associated with the hard X-ray source dominating the emission of M31. A...

Ultraluminous x-ray sources (ULXs) in nearby galaxies shine brighter than any x-ray source in our Galaxy. ULXs are usually modeled as stellar-mass black holes (BHs) accreting at very high rates or intermediate-mass BHs.We present observations showing that NGC 5907 ULX is instead an x-ray accreting neutron star (NS) with a spin period evolving...