Emission profiles of the inward-shock filaments in the west (left) and center (right). The profiles were extracted from 15 pixels wide using a 2004 image in the 4.2–6 keV band and were normalized by the peak intensities. The positive direction in the angular distance shows a direction to the outside of the remnant. The scale bar in the right panel shows the Chandra's angular resolution, ∼0.″5 (FWHM).