Table 2: Photometric observations of SN 2003du.
Date JD Phase* U B V R I Seeing
  2 400 000+ (days)           ( $^{\prime\prime}$)
24/4/03 52 754.2  -12.1   $15.08\pm 0.03$   $15.30\pm 0.02$ $15.32\pm 0.02$   $15.22\pm 0.01$   $15.30\pm 0.02$ 1.7
25/4/03 52 755.3  -11.0   $14.55\pm 0.02$   $14.82\pm 0.02$ $14.91\pm 0.02$   $14.75\pm 0.02$   $14.77\pm 0.03$ 2.0
29/4/03 52 759.3  -7.0   $13.44\pm 0.03$   $13.94\pm 0.02$ $14.06\pm 0.02$     $14.29\pm 0.02$ 1.5
04/5/03 52 764.2  -2.1   $13.07\pm 0.03$   $13.55\pm 0.02$ $13.64\pm 0.02$   $13.62\pm 0.01$   $13.85\pm 0.02$ 2.1
09/5/03 52 769.3  +3.0   $13.25\pm 0.02$   $13.60\pm 0.02$ $13.63\pm 0.01$   $13.66\pm 0.01$   $14.04\pm 0.02$ 1.9
11/5/03 52 771.3  +5.0   $13.44\pm 0.02$   $13.72\pm 0.02$     $13.73\pm 0.01$   $14.13\pm 0.01$ 1.8
15/5/03 52 775.2  +8.9   $13.64\pm 0.02$   $13.97\pm 0.02$ $13.84\pm 0.01$   $13.90\pm 0.01$   $14.38\pm 0.01$ 1.7
18/5/03 52 778.3  +12.0   $14.01\pm 0.02$   $14.22\pm 0.02$ $14.00\pm 0.02$   $14.17\pm 0.01$   $14.57\pm 0.02$ 1.6
19/5/03 52 779.3  +13.0   $14.14\pm 0.02$   $14.35\pm 0.02$ $14.08\pm 0.02$   $14.23\pm 0.01$   $14.60\pm 0.01$ 1.6
25/5/03 52 784.3  +18.0   $14.76\pm 0.02$   $14.90\pm 0.02$ $14.36\pm 0.01$   $14.40\pm 0.01$   $14.59\pm 0.01$ 2.0
31/5/03 52 791.4  +25.1   $15.59\pm 0.02$   $15.65\pm 0.02$ $14.71\pm 0.01$     1.9
01/6/03 52 792.3  +26.0   $15.68\pm 0.03$   $15.74\pm 0.02$ $14.74\pm 0.02$   $14.51\pm 0.01$   $14.42\pm 0.01$ 1.4
23/6/03 52 814.2  +47.9     $15.72\pm 0.03$   $15.49\pm 0.01$   $15.27\pm 0.03$ 2.4
28/6/03 52 819.3  +53.0   $16.72\pm 0.02$   $16.79\pm 0.02$ $15.90\pm 0.02$   $15.70\pm 0.02$   3.0
03/7/03 52 824.1  +57.8   $16.85\pm 0.02$   $16.94\pm 0.02$ $16.05\pm 0.01$   $15.92\pm 0.02$   2.0
01/8/03 52 853.2  +86.9   $17.49\pm 0.02$   $17.34\pm 0.02$ $16.79\pm 0.01$   $16.75\pm 0.02$   $16.95\pm 0.02$ 1.2
06/8/03 52 858.2  +91.9     $17.46\pm 0.02$ $16.91\pm 0.01$   $16.90\pm 0.01$   $17.12\pm 0.01$ 1.9
30/8/03 52 882.2  +115.9     $17.87\pm 0.02$ $17.51\pm 0.02$   $17.61\pm 0.02$   $17.95\pm 0.02$ 1.7
05/9/03 52 888.1  +121.8     $17.95\pm 0.03$ $17.60\pm 0.01$   $17.75\pm 0.02$   $18.03\pm 0.02$ 2.1
20/9/03 52 903.1  +136.8   $18.71\pm 0.04$   $18.10\pm 0.03$ $17.90\pm 0.03$   $18.05\pm 0.03$   1.6
21/9/03 52 904.2  +137.9     $18.16\pm 0.02$ $17.94\pm 0.02$   $18.06\pm 0.02$   $18.14\pm 0.05$ 1.9
24/2/04 53 060.5  +293.7     $20.37\pm 0.05$ $20.32\pm 0.04$   $20.65\pm 0.06$   $19.90\pm 0.07$ 1.8
01/3/04 53 066.5  +300.2     $20.43\pm 0.04$ $20.24\pm 0.05$   $20.68\pm 0.10$   $19.88\pm 0.11$ 2.3
14/4/04 53 110.5  +344.2         $20.70\pm 0.06$   1.9
02/5/04 53 128.3  +362.0     $20.77\pm 0.04$   $20.66\pm 0.06$   2.0

* Relative to the epoch of B maximum JD = 2 452 766.3.

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