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Table 1

VLBI observations of SN 1993J.

Date Age1 PI2 Freq. R SC3 R PR4 R MF5 Dyn. range6
(dd/mm/yy) (days) (GHz) (mas) (mas) (mas)
27/04/937 30 B 22 0.094  ±  0.004 0.094  ±  0.004 0.089  ±  0.008 ...
17/05/937 50 B 22 0.154  ±  0.005 0.154  ±  0.005 0.146  ±  0.010 ...
15 0.162  ±  0.018 0.162  ±  0.018 0.15  ±  0.03 ...
8.4 0.134  ±  0.005 0.134  ±  0.005 0.127  ±  0.009 ...
27/06/937 91 B 15 0.254  ±  0.008 0.254  ±  0.008 0.241  ±  0.015 ...
8.4 0.264  ±  0.006 0.264  ±  0.006 0.250  ±  0.010 ...
04/08/937 129 B 15 0.38  ±  0.03 0.38  ±  0.03 0.36  ±  0.06 ...
8.4 0.347  ±  0.008 0.347  ±  0.009 0.329  ±  0.015 ...
19/09/937 175 B 15 0.461  ±  0.008 0.461  ±  0.008 0.437  ±  0.015 ...
8.4 0.448  ±  0.008 0.448  ±  0.009 0.425  ±  0.015 ...
26/09/938 182 M 8.4 0.517  ±  0.017 0.517  ±  0.018 0.49  ±  0.03 307.4
06/11/937 223 B 15 0.565  ±  0.015 0.565  ±  0.015 0.54  ±  0.03 ...
8.4 0.561  ±  0.008 0.561  ±  0.009 0.531  ±  0.015 ...
5.0 0.565  ±  0.017 0.565  ±  0.017 0.54  ±  0.03 ...
22/11/938 239 M 8.4 0.67  ±  0.06 0.67  ±  0.06 0.63  ±  0.11 450.9
17/12/937 264 B 15 0.77  ±  0.03 0.77  ±  0.03 0.73  ±  0.05 ...
8.4 0.710  ±  0.011 0.710  ±  0.011 0.673  ±  0.019 ...
28/01/947 306 B 15 0.73  ±  0.04 0.73  ±  0.04 0.69  ±  0.07 ...
8.4 0.793  ±  0.014 0.793  ±  0.014 0.75  ±  0.02 ...
5.0 0.78  ±  0.02 0.78  ±  0.02 0.74  ±  0.04 ...
20/02/948 329 M 8.4 0.87  ±  0.07 0.87  ±  0.07 0.82  ±  0.12 199.3
15/03/947 352 B 8.4 0.862  ±  0.014 0.862  ±  0.014 0.82  ±  0.02 ...
5.0 0.863  ±  0.014 0.863  ±  0.014 0.82  ±  0.02 ...
22/04/947 390 B 8.4 0.991  ±  0.017 0.991  ±  0.017 0.94  ±  0.03 ...
5.0 0.955  ±  0.017 0.955  ±  0.017 0.90  ±  0.03 ...
2.3 1.00  ±  0.05 1.00  ±  0.05 0.95  ±  0.09 ...
29/05/948 427 M 8.4 1.08  ±  0.10 1.08  ±  0.11 1.02  ±  0.18 123.8
22/06/947 451 B 8.4 1.062  ±  0.017 1.062  ±  0.017 1.01  ±  0.03 ...
5.0 1.098  ±  0.017 1.098  ±  0.017 1.04  ±  0.03 ...
30/08/947 520 B 8.4 1.248  ±  0.019 1.25  ±  0.02 1.18  ±  0.03 ...
5.0 1.232  ±  0.019 1.23  ±  0.02 1.17  ±  0.03 ...
2.3 1.29  ±  0.04 1.29  ±  0.04 1.22  ±  0.08 ...
20/09/948 541 M 5.0 1.21  ±  0.14 1.21  ±  0.14 1.15  ±  0.24 152.4
31/10/947 582 B 8.4 1.35  ±  0.02 1.35  ±  0.02 1.28  ±  0.04 ...
5.0 1.35  ±  0.02 1.35  ±  0.02 1.27  ±  0.04 ...
23/12/947 635 B 8.4 1.39  ±  0.02 1.39  ±  0.02 1.31  ±  0.04 ...
5.0 1.43  ±  0.02 1.43  ±  0.02 1.36  ±  0.04 ...
2.3 1.48  ±  0.05 1.48  ±  0.05 1.40  ±  0.09 ...
12/02/95 686 B 8.4 1.52  ±  0.08 1.53  ±  0.08 1.41  ±  0.04 42.7
23/02/95 697 M 5.0 1.48  ±  0.04 1.48  ±  0.04 1.38  ±  0.11 140.7
11/05/95 774 B 8.4 1.60  ±  0.20 1.64  ±  0.21 1.68  ±  0.12 36.9
5.0 1.68  ±  0.10 1.68  ±  0.11 1.56  ±  0.04 14.2
11/05/95 774 M 5.0 1.66  ±  0.07 1.71  ±  0.08 1.51  ±  0.80 194.6
18/08/95 873 B 8.4 1.73  ±  0.16 1.73  ±  0.16 1.77  ±  0.11 23.5
5.0 1.85  ±  0.07 1.81  ±  0.07 1.51  ±  0.30 44.5
01/10/95 917 M 5.0 1.92  ±  0.07 1.92  ±  0.08 1.92  ±  0.05 168.7
19/12/95 996 B 8.4 2.11  ±  0.06 2.11  ±  0.06 2.12  ±  0.11 35.2
5.0 2.15  ±  0.11 2.15  ±  0.12 2.13  ±  0.07 71.0
2.3 2.23  ±  0.05 2.23  ±  0.05 2.11  ±  0.08 116.9
28/03/96 1096 M 5.0 2.21  ±  0.05 2.21  ±  0.06 2.14  ±  0.11 63.0
08/04/96 1107 B 8.4 2.41  ±  0.18 2.34  ±  0.19 2.14  ±  0.15 52.3
5.0 2.10  ±  0.20 2.02  ±  0.21 1.98  ±  0.12 56.0
17/06/96 1177 M 5.0 2.31  ±  0.07 2.31  ±  0.07 2.23  ±  0.10 30.6
01/09/96 1253 B 8.4 2.50  ±  0.10 2.53  ±  0.10 2.29  ±  0.06 30.7
5.0 2.51  ±  0.08 2.50  ±  0.08 2.33  ±  0.04 74.5
22/10/96 1304 M 5.0 2.61  ±  0.04 2.61  ±  0.04 2.47  ±  0.06 120.9
13/12/96 1356 B 8.4 2.65  ±  0.06 2.66  ±  0.06 2.52  ±  0.07 20.6
5.0 2.62  ±  0.11 2.63  ±  0.12 2.59  ±  0.11 62.8
2.3 2.52  ±  0.18 2.52  ±  0.19 2.44  ±  0.10 165.1
25/02/97 1430 M 5.0 2.81  ±  0.09 2.81  ±  0.10 2.51  ±  0.10 79.4
07/06/97 1532 B 8.4 2.90  ±  0.13 2.90  ±  0.14 2.73  ±  0.11 19.1
5.0 2.86  ±  0.06 2.84  ±  0.07 2.70  ±  0.43 21.6
21/09/97 1638 M 5.0 3.09  ±  0.05 3.09  ±  0.06 2.94  ±  0.02 101.9
15/11/97 1693 B 8.4 3.14  ±  0.07 3.15  ±  0.12 2.91  ±  0.15 31.2
5.0 3.13  ±  0.15 3.13  ±  0.16 3.05  ±  0.13 84.0
2.3 3.17  ±  0.50 3.17  ±  0.57 3.03  ±  0.16 113.6
18/02/98 1788 M 5.0 3.37  ±  0.05 3.39  ±  0.05 3.21  ±  0.05 86.6
30/05/98 1889 M 5.0 3.48  ±  0.06 3.48  ±  0.07 3.33  ±  0.09 112.6
03/06/98 1893 B 8.4 3.46  ±  0.07 3.37  ±  0.08 3.33  ±  0.14 35.4
5.0 3.43  ±  0.09 3.45  ±  0.09 3.18  ±  0.13 26.9
20/11/98 2064 B 5.0 3.73  ±  0.16 3.75  ±  0.17 3.63  ±  0.06 26.0
23/11/98 2066 M 5.0 3.74  ±  0.07 3.74  ±  0.08 3.50  ±  0.05 94.7
30/11/98 2073 M 1.7 3.78  ±  0.07 3.91  ±  0.08 3.58  ±  0.15 150.5
07/12/98 2080 B 8.4 3.74  ±  0.09 3.75  ±  0.09 3.47  ±  0.14 30.0
2.3 3.77  ±  0.07 3.96  ±  0.08 3.57  ±  0.16 62.0
06/06/99 2261 B 1.7 4.11  ±  0.07 4.17  ±  0.08 3.82  ±  0.05 60.1
10/06/99 2265 M 5.0 4.07  ±  0.08 4.10  ±  0.08 3.81  ±  0.04 61.9
16/06/99 2271 B 5.0 4.05  ±  0.35 4.02  ±  0.36 3.71  ±  0.16 23.3
22/09/99 2369 M 5.0 4.12  ±  0.07 4.12  ±  0.08 3.93  ±  0.05 41.1
28/09/99 2376 B 1.7 4.28  ±  0.07 4.43  ±  0.08 4.13  ±  0.09 3.8
24/11/99 2432 B 5.0 4.32  ±  0.22 4.34  ±  0.23 4.12  ±  0.12 21.8
25/02/00 2525 B 8.4 4.43  ±  0.09 4.48  ±  0.10 4.12  ±  0.32 26.9
06/06/00 2627 M 5.0 4.52  ±  0.10 4.38  ±  0.11 4.36  ±  0.06 40.2
13/11/00 2787 B 8.4 4.77  ±  0.13 4.65  ±  0.13 4.90  ±  0.29 14.5
2.3 4.85  ±  0.40 4.70  ±  0.39 4.81  ±  0.25 19.5
20/11/00 2794 M 1.7 5.01  ±  0.13 5.07  ±  0.13 4.75  ±  0.05 219.7
24/11/00 2798 M 5.0 4.76  ±  0.18 4.79  ±  0.18 4.76  ±  0.06 56.71
14/02/01 2880 M 5.0 4.94  ±  0.12 4.95  ±  0.12 4.65  ±  0.07 116.2
10/06/01 2996 B 5.0 5.00  ±  0.14 4.99  ±  0.14 4.90  ±  0.09 32.1
18/11/01 3157 M 5.0 5.21  ±  0.18 5.16  ±  0.19 4.28  ±  0.60 38.7
26/11/01 3164 B 1.7 5.59  ±  0.17 5.52  ±  0.18 5.17  ±  0.12 98.1
24/05/02 3344 B 5.0 5.49  ±  0.18 5.48  ±  0.19 5.03  ±  0.06 13.2
07/11/02 3511 M 5.0 5.77  ±  0.19 5.76  ±  0.19 5.57  ±  0.40 18.2
17/11/02 3521 M 1.7 6.15  ±  0.18 6.06  ±  0.19 5.85  ±  0.10 78.5
01/06/03 3717 B 5.0 6.04  ±  0.23 5.79  ±  0.23 5.26  ±  0.29 19.6
29/10/03 3867 M 5.0 6.34  ±  0.18 6.34  ±  0.20 5.88  ±  0.22 21.9
25/05/04 4076 B 5.0 6.45  ±  0.31 6.13  ±  0.32 5.74  ±  0.30 15.3
06/06/04 4088 B 1.7 6.72  ±  0.21 6.58  ±  0.24 6.49  ±  0.14 35.4
31/10/04 4235 M 5.0 6.33  ±  0.24 6.56  ±  0.24 ...9 19.8
11/06/05 4458 B 5.0 6.55  ±  0.26 6.89  ±  0.27 5.90  ±  0.61 18.7
22/10/05 4591 M 5.0 6.64  ±  0.29 6.64  ±  0.29 6.10  ±  0.57 27.3
06/11/05 4606 M 1.7 7.00  ±  0.30 6.87  ±  0.27 6.58  ±  0.11 45.9

Notes. 

(1)

Assumed explosion date:     28 March 1993.

(2)

Principal Investigator:    M = J. M. Marcaide;     B = N. Bartel / M. F. Bietenholz / M. Rupen.

(3)

Shell radii determined with the CPM applied to images obtained from self-calibrated visibilities (see text).

(4)

Shell radii determined with the CPM applied to images obtained from phase-referenced visibilities (see text).

(5)

Shell radii determined from model fitting to the visibilities.

(6)

Dynamic range of the supernova images (i.e., peak flux density in units of the root-mean-square of the image background), computed using natural visibility weighting and applying a Gaussian taper in Fourier space (see Sect. 2.1).

(7)

Epochs where the shell radii were taken from Bartel et al. (2002), but applying the corresponding biases (see Sect. 3.2.1) to make them comparable to the radii obtained with the CPM and with the radii estimated from our visibility model fitting.

(8)

Epochs where the “CPM-like” radii were adapted from model-fitting results, to avoid image over-resolutions if the CPM were applied directly.

(9)

Unsatisfactory fit (unclear minimum of the χ2).

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