0120133

We propose a 900 ksec observation of the remnant of the supernova of 1006 AD the Rosetta Stoneobject for the study of electron acceleration to very high energies. The combination of IBIS and Jem-Xspatial and spectral coverage should allow testing of the hyposthesis that the emission above 3 keVis dominantly synchrotron and should either detect or put limits on a contribution from nonthermalbremsstrahlung. The angular diameter of SN 1006 30 is large enough that IBIS will have sufficientspatial resolution to perform a simple discrimination on the highest-energy detectable hard X-rays:synchrotron emission should come from two opposing limbs while bremsstrahlung should have amore uniform ring morphology. Jem-X will resolve SN 1006 with about 10 beams across its diameterample to search for a bremsstrahlung contribution and comparable to ASCA resolution at thermalX-ray energies. The energy range of 5 to 50 keV shows the lowest-energy suprathermal cosmic-rayelectrons through bremsstrahlung and the highest-energy electrons through synchrotron radiation.Quantitative inferences from detections or limits can include the efficiency of shock acceleration ofelectrons the maximum energies to which electrons can be accelerated and indirect constraintson the mean remnant magnetic field strength. INTEGRAL can make a major contribution to theunderstanding of nonthermal emission from this important object and through it to the understandingof acceleration of particles at shocks anywhere in astrophysics. [truncated! Please see actual data for full text]