0220141

We propose to observe pulsar PSR B1509-58 for 1000 ks with INTEGRAL to determine its hard X-ray/softgamma-ray characteristics in great detail. This pulsar is a young pulsar posssesing the highest spin-downdipole magnetic field of the known gamma-ray pulsars and is among the top four in the known radio pulsarpopulation.We plan to exploit the proposed INTEGRAL observation together with available CGRO BATSECGRO COMPTEL and BeppoSAX data for a consistent in-depth study of the pulse profile shape and spectral variations with phase from 1 keV up to 30 Mev. Such phase resolved spectral analyses give crucial input fordetailed modelling. Both scenarios outer gap and polar cap have been used for detailed calculations to account for the observed high-energy characteristics of PSR B1509-58. More detailed observations and morerefined model calculations are required to decide this ``battle. [truncated! Please see actual data for full text]