TY - JOUR AU - P. Haljan AU - B. Anderson AU - I. Coddington AU - Eric Cornell BT - Physical Review Letters DA - 2001-04 DO - 10.1103/PhysRevLett.86.2922 PY - 2001 SP - 2922 EP - 2925 T2 - Physical Review Letters TI - Use of Surface-Wave Spectroscopy to Characterize Tilt Modes of a Vortex in a Bose-Einstein Condensate VL - 86 SN - 0031-9007 ER -