PLEASE READ: cells in the following tables are separated by "&". Some latex designation of units and symbols is kept in order to preserve proper typesetting.

TABLE 1: Details of the Swift-XRT follow-up observations of the January event.

Swift Observation ID &    Date Start          & Date End                & Exposure    & Pointing Direction 
                     &    (UT)                &  (UT)                   &   (ks)      & J2000
00031575001          & 2010 Jan 07 at 13:04   & 2011 Jan 07 at 14:29    &  1.5        & 89.07\deg, -40.96\deg
00031575002          &  2010 Jan 11 at 19:11  &  2010 Jan 11 at 19:38   & 1.6         & 89.00\deg, -40.92\deg
00031576001          &  2010 Jan 07 at 14:33  &  2010 Jan 07 at 15:55   & 1.7         & 89.14\deg, -40.80\deg
00031576002          &  2010 Jan 11 at 15:59  &  2010 Jan 11 at 16:18   & 1.1         & 89.13\deg, -40.77\deg
00031577001          &  2010 Jan 07 at 15:57  &  2010 Jan 07 at 17:20   & 1.8         & 88.60\deg, -40.81\deg
00031577002          &  2010 Jan 11 at 17:35  &  2010 Jan 11 at 18:02   & 1.6         & 88.60\deg, -40.76\deg
00031578001          &  2010 Jan 07 at 17:23  &  2010 Jan 07 at 18:49   & 2.0         & 88.07\deg, -40.79\deg
00031578002          &  2010 Jan 11 at 13:18  &  2010 Jan 11 at 15:01   & 1.4         & 88.06\deg, -40.78\deg
00031579001          &  2010 Jan 07 at 20:26  &  2010 Jan 07 at 20:59   & 2.0         & 88.71\deg, -41.16\deg
00031579002          &  2010 Jan 11 at 18:03  &  2010 Jan 11 at 19:51   & 1.4         & 88.77\deg, -41.17\deg

TABLE 2: Details of the Swift-XRT follow-up observations of the September event.

Swift Observation  &    Date Start         & Date End                & Exposure    & Pointing Direction
                   &    (UT)               &  (UT)                   &   (ks)      & J2000
00031825001        & 2010 Sep 16 at 18:10  & 2010 Sep 16 at 18:35    &  1.5        & 110.98\deg, -27.53\deg
00031825002        & 2010 Dec 30 at 03:17  & 2010 Dec 30 at 03:19    &  0.09       & 110.98\deg, -27.54\deg
00031825003        & 2010 Dec 30 at 00:06  & 2010 Dec 30 at 03:34    &  2.3        & 110.98\deg, -27.53\deg
00031826001        & 2010 Sep 16 at 19 36  & 2010 Sep 16 at 20:09    &  2.0        & 109.86\deg, -27.57\deg
00031826002        & 2010 Dec 29 at 03:37  & 2010 Dec 29 at 04:50    &  0.14       & 109.85\deg, -27.54\deg
00031826003        & 2010 Dec 29 at 03:38  & 2010 Dec 29 at 05:09    &  1.9        & 109.86\deg, -27.58\deg

TABLE 3: The reduced-threshold detections in the X-ray data for the January event.

Source #  &    Right ascension (RA) & Declination (dec)                                 & Position Error                 &  Count Rate              & N$_{\rm s}$~$^1$ & Variability~$^2$
          &    (J2000)              &  (J2000)                                          & ($^{\prime\prime}$ 90\% conf.) & (0.3--10 keV, ks$^{-1}$) &                  & significance ($\sigma$)
1         & 05h 55m 1.00s           &    -40\deg 58$^{\prime}$ 00.8$^{\prime\prime}$    & 4.5                            & 5.9$^{+1.5}_{-1.2}$      &     0.9          & 2.05
2         & 05h 57m 4.80s           &    -40\deg 54$^{\prime}$ 45.4$^{\prime\prime}$    & 4.3                            & 5.9$^{+2.1}_{-1.6}$      &     0.9          & 0.26
3         & 05h 54m 12.72s          &    -40\deg 44$^{\prime}$ 05.8$^{\prime\prime}$    & 4.3                            & 4.6$^{+1.5}_{-1.2}$      &     1.3          & 0.45
4         & 05h 54m 59.29s          &    -40\deg 54$^{\prime}$ 19.6$^{\prime\prime}$    & 4.5                            & 3.2$^{+1.3}_{-1.0}$      &     2.4          & 0.75
5         & 05h 51m 57.66s          &    -40\deg 46$^{\prime}$ 10.9$^{\prime\prime}$    & 5.6                            & 2.8$^{+1.8}_{-1.1}$      &     2.9          & 1.10
6         & 05h 51m 41.12s          &    -40\deg 44$^{\prime}$ 46.4$^{\prime\prime}$    & 5.5                            & 1.4$^{+1.1}_{-0.7}$      &     7.5          & 0.74
7         & 05h 52m 6.29s           &    -40\deg 59$^{\prime}$ 14.3$^{\prime\prime}$    & 6.5                            & 2.3$^{+1.2}_{-0.8}$      &     3.9          & 0.91
8         & 05h 52m 55.88s          &    -40\deg 46$^{\prime}$ 14.9$^{\prime\prime}$    & 5.2                            & 2.9$^{+1.7}_{-1.2}$      &     2.8          & 2.00

TABLE 4: The reduced-threshold detections in the X-ray data for the September event.

Source #  &    Right ascension (RA) & Declination (dec)                                 & Position Error                 &  Count Rate              & N$_{\rm s}$      & Variability
          &    (J2000)              &  (J2000)                                          & ($^{\prime\prime}$ 90\% conf.) & (0.3--10 keV, ks$^{-1}$) &                  & significance ($\sigma$) 
1         & 07h 23m 22.99s          &    -27\deg 26$^{\prime}$ 10.1$^{\prime\prime}$    & 4.4                            & 2.8$^{+0.9}_{-0.7}$      &    2.9           & 1.47
2         & 07h 23m 22.34s          &    -27\deg 33$^{\prime}$ 09.5$^{\prime\prime}$    & 4.4                            & 2.3$^{+1.1}_{-0.7}$      &    3.9           & 1.09
3         & 07h 23m 34.43s          &    -27\deg 23$^{\prime}$ 32.4$^{\prime\prime}$    & 5.4                            & 2.4$^{+1.1}_{-0.8}$      &    3.7           & 1.47
4         & 07h 24m 34.95s          &    -27\deg 31$^{\prime}$ 31.1$^{\prime\prime}$    & 6.1                            & 1.8$^{+1.2}_{-0.7}$      &    5.5           & 1.01
5         & 07h 23m 53.50s          &    -27\deg 23$^{\prime}$ 06.5$^{\prime\prime}$    & 4.4                            & 0.6$^{+0.3}_{-0.2}$      &    17            & 1.30
6         & 07h 24m 27.89s          &    -27\deg 35$^{\prime}$ 40.8$^{\prime\prime}$    & 6.5                            & 2.3$^{+1.1}_{-0.7}$      &    3.9           & 2.48
7         & 07h 23m 54.14s          &    -27\deg 42$^{\prime}$ 29.5$^{\prime\prime}$    & 6.4                            & 2.2$^{+1.0}_{-0.7}$      &    4.2           & 1.20
8         & 07h 19m 30.22s          &    -27\deg 45$^{\prime}$ 42.5$^{\prime\prime}$    & 4.1                            & 8.8$^{+3.4}_{-2.4}$      &    0.5           & 0.44
9         & 07h 19m 37.14s          &    -27\deg 33$^{\prime}$ 12.0$^{\prime\prime}$    & 5.2                            & 2.4$^{+1.1}_{-0.8}$      &    3.7           & 0.60
10        & 07h 19m 25.72s          &    -27\deg 31$^{\prime}$ 37.0$^{\prime\prime}$    & 5.8                            & 0.9$^{+0.6}_{-0.3}$      &    12            & 0.36
11        & 07h 19m 18.04s          &    -27\deg 25$^{\prime}$ 15.4$^{\prime\prime}$    & 5.0                            & 1.7$^{+0.9}_{-0.6}$      &    5.9           & 0.97
12        & 07h 19m 41.92s          &    -27\deg 39$^{\prime}$ 58.1$^{\prime\prime}$    & 5.0                            & 1.6$^{+1.2}_{-0.7}$      &    6.4           & 1.02

TABLE 5: UVOT photometry for XRT detections in January event

XRT Source No. & 00031576001     & 00031577001     & 00031577002    & 00031578001 & 00031578002 & 00031592001
               & white           & white           & white          & u           & u           & uvm2
1              & ...             & ...             & ...            & ...         & ...         &  19.83$\pm$0.09
2              &  20.09$\pm$0.06 & ...             & ...            & ...         & ...         & ...
3              & ...             &  17.70$\pm$0.04 & 17.78$\pm$0.04 & ...         & ...         & ...
4              & ...             &  19.50$\pm$0.06 & ...            & ...         & ...         &  18.36$\pm$0.04
5              & ...             &  ...            & ...            & $>$21.53    & $>$21.33    & ...
6              & ...             &  ...            & ...            & $>$21.55    & $>$21.27    & ...
7              & ...             &  ...            & ...            & ...         & ...         & ...
8              & ...             &  ...            & ...            & $>$21.52    & $>$21.40    & ...

TABLE 6: UVOT photometry for XRT detections in September event

XRT Source No. & 00031825001     & 00031825003     & 00031826001    & 00031826003
               & u               & u               & white          & white
1              & ...             & ...             & ...            & ...
2              & $>$20.73        & $>$21.21        & ...            & ...
3              & 14.11$\pm$0.02  & 14.11$\pm 0.02$ & ...            & ...
4              & $>$20.76        & $>$21.22        & ...            & ...
5              & 19.76$\pm$0.17  & 20.67$\pm 0.23$ & ...            & ...
6              & $>$20.79        & 21.10$\pm 0.33$ & ...            & ...
7              & ...             & ...             & ...            & ...
8              & ...             & ...             & ...            & ...
9              & ...             & ...             & 20.75$\pm$0.36 & 20.32$\pm$0.12
10             & ...             & ...             & 18.76$\pm$0.07 & 18.90$\pm$0.04
11             & ...             & ...             & $>$20.79       & ...
12             & ...             & ...             & $>$20.84       & $>$21.65