X-RAY-LINE WIDTHS AND CORONAL HEATING by Acton, L, Culhane, J, Gabriel, A, Wolfson, C, Rapley, C, Phillips, K, Antonucci, E, Bentley, R, Hayes, R, Joki, E, Jordan, C, Kayat, M, Kent, B, Leibacher, J, Nobles, R, Parmar, A, Strong, K, Veck, N