Using hundreds of XMM-Newton and Chandra archival observations and nearly a thousand RXTE observations , we have generated a comprehensive library of the known pulsars in the Small and Large Magellanic Clouds ( SMC , LMC ) .
The pulsars are detected multiple times across the full parameter spaces of X-ray luminosity ( L _ { X } = 10 ^ { 31 - 38 } erg/s ) and spin period ( P < 1s – P > 1000s ) and the library enables time-domain studies at a range of energy scales .
The high time-resolution and sensitivity of the EPIC cameras are complemented by the angular resolution of Chandra and the regular monitoring of RXTE .
Our processing pipeline uses the latest calibration files and software to generate a suite of useful products for each pulsar detection : event lists , high time-resolution light curves , periodograms , spectra , and complete histories of \dot { P } , the pulsed fraction , etc. , in the broad ( 0.2-12 keV ) , soft ( 0.2-2 keV ) , and hard ( 2-12 keV ) energy bands .
After combining the observations from these telescopes , we found that 28 pulsars show long-term spin up and 25 long-term spin down .
We also used the faintest and brightest sources to map out the lower and upper boundaries of accretion-powered X-ray emission : the propeller line and the Eddington line , respectively .
We are in the process of comparing the observed pulse profiles to geometric models of X-ray emission in order to constrain the physical parameters of the pulsars .
Finally we are preparing a public release of the library so that it can be used by others in the astronomical community .