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Table 2

Expansion parameters of SN 1993J.

5 to 22 GHz 1.7 GHz
m 1 m 2 tbr (days) m 3
CPM selfcala 0.933 ± 0.010 0.796 ± 0.005 390 ± 30 0.87 ± 0.02
CPM ph-refb 0.933 ± 0.010 0.795 ± 0.005 390 ± 40 0.83 ± 0.02
Model fittingc 0.94 ± 0.06 0.798 ± 0.007 270 ± 70 0.90 ± 0.03
Bartel 1d 0.93 ± 0.02 0.798 ± 0.006 390 ± 50 0.84 ± 0.06
Bartel 2e 0.82 ± 0.03 0.796 ± 0.016 1000 ± 700 0.84 ± 0.06
Marcaidef 0.845 ± 0.005 0.788 ± 0.015 1500 ± 300 0.87 ± 0.03

Notes. 

(a)

Using CPM-measured supernova sizes from images obtained from self-calibrated visibilities, as described in Marcaide et al. (2009).

(b)

Using CPM-measured sizes from images obtained from phase-referenced visibilities.

(c)

Using model fitting to the visibilities.

(d)

Using the shell sizes reported in Bartel et al. (2002).

(e)

Using the sizes reported in Bartel et al. (2002), but taking only the epochs later than day 182 after explosion (i.e., the day of the first epoch reported in Marcaide et al. 2009).

(f)

Refit using the shell sizes reported in Marcaide et al. (2009).

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