092346

The XMM discovery of a ms pulsar swinging between an accretion-powered (X-ray)and a rotation-powered (radio) pulsar state demonstrated that transitionsbetween the two states can be observed over timescales of a few weeks. Wepropose an XMM NuSTAR and VLA ToO observation aimed at studying the accretionstate of transitional ms pulsars detecting X-ray accretion powered pulsationsand characterizing the X-ray variability over three decades in energy.Candidates are restricted to black widows and redbacks systems that are in anevolutionary phase that makes them good candidates to observe a transition. Enlarging the number of transitional ms pulsars is crucial to test binaryevolution theories and to study the disk-field interaction over a large range of mass accretion rates. [truncated! Please see actual data for full text]