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The Crab Nebula's Moving Wisps in Radio
M. F. Bietenholz, D. A. Frail, J. J. Hester
We present three high resolution radio images of the Crab nebula, taken in 1998.6, 1998.8 and 2000.1 with the VLA. These are the best radio images of the Crab to date. We show that…
Radio Spectral Index and Expansion of 3C58
M. F. Bietenholz, N. E. Kassim, K. W. Weiler
We present new observations of the plerionic supernova remnant 3C58 with the VLA at 74 and 327 MHz. In addition, we re-reduced earlier observations at 1.4 and 4.9 GHz taken in 1973…
SN1993J VLBI (I): The Center of the Explosion and a Limit on Anisotropic Expansion
M. F. Bietenholz, N. Bartel, M. P. Rupen
Phase-referenced VLBI observations of supernova 1993J at 24 epochs, from 50 days after shock breakout to the present, allowed us to determine the coordinates of the explosion cente…