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Table 1

Swift observations log.

Tstart Texp(s)
(Date/UT) (V,B,U) (UVW1) (UVW2) XRT

1 09-03/01:00 66.7 133.6 268.5 1766
2 10-03/17:18 37.2 74.6 150.4 1688
3 11-03/19:01 37.2 75.6 150.3 1691
4 12-03/15:54 37.2 74.6 150.4 1656
5 13-03/20:49 37.2 74.6 150.4 829.1
6 14-03/09:07 55.9 112.0 223.2 1973
7 15-03/11:05 81.5 163.2 325.6 1748
8 16-03/00:00 27.3 55.9 111.0 1930
9 17-03/08:20 27.3 55.9 111.0 2677
10 18-03/10:04 27.3 55.9 111.0 1721
11 19-03/10:10 22.4 46.0 91.3 1671
12 26-03/07:06 101.2 202.5 405.3 2000
13 02-04/20:56 114.0 228.1 456.5 2442
14 11-04/09:11 39.1 79.5 158.2 1741
15 17-04/00:11 45.0 90.3 181.9 2030
16 22-04/11:52 56.9 113.9 228.1 2055
17 30-04/04:43 56.9 113.0 227.1 1873
18 09-05/15:12 69.7 138.5 261.9 1393
19 14-05/04:02 90.3 180.9 361.9 2255
20 20-05/01:27 83.4 167.1 64.7 839.1

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