Continued Tracking of the Spin of the ULX Pulsar NGC 7793 P13 with XMM-Newton
Abstract
NGC 7793 P13 is one of the best targets among the ultra-luminous X-raypulsars (ULXPs) to study how neutron stars can sustain accretion ratesorders of magnitude above their Eddington limit. It has strong pulsationsand a known optical counterpart, which allowed us to determine thefull orbital ephemeris using XMM- Newton data. In 2020 P13 entered anoff-state, from which it is currently re- emerging. This gives us theunique opportunity to study the accretion flow as the accretion geometryis changing and will allow us to infer more physical parameter of thesystem, like the magnetic field. Therefore we propose to continue oursuccessful campaign of AOs 17 19 to monitor the spectrum and pulseperiod of P13 and other sources in NGC 7793 throughout AO 20 with 2 40ks observations.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2020
- Bibcode:
- 2020xmm..prop..134F