%0 Journal Article
%T Swift/BAT detection of hard X-rays from Tycho's Supernova Remnant: Evidence for Titanium-44
%A E. Troja
%A A. Segreto
%A V. La Parola
%A D. Hartmann
%A W. Baumgartner
%A C. Markwardt
%A S. Barthelmy
%A G. Cusumano
%A N. Gehrels
%J Physics
%D 2014
%I arXiv
%R 10.1088/2041-8205/797/1/L6
%X We report Swift/BAT survey observations of the Tycho's supernova remnant, performed over a period of 104 months since the mission's launch. The remnant is detected with high significance (>10 sigma) below 50 keV. We detect significant hard X-ray emission in the 60-85 keV band, above the continuum level predicted by a simple synchrotron model. The location of the observed excess is consistent with line emission from radioactive Titanium-44, so far reported only for Type II supernova explosions. We discuss the implications of these results in the context of the galactic supernova rate, and nucleosynthesis in Type Ia supernova.
%U http://arxiv.org/abs/1411.0991v1