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Table 1

The observation log.

System Obs. date Nightly mean errors [mag] and integration times [s]
B V R

QX And 2009/08/17  ± 0.005 15  ± 0.004 5  ± 0.004 3
2009/09/25  ± 0.005 15  ± 0.004 5  ± 0.004 3
2009/09/29  ± 0.005 15  ± 0.004 5  ± 0.004 3
RW Com 2009/02/02 ±0.010 40 ±0.005 17 ±0.004 10
2009/03/20 ±0.010 40 ±0.005 18 ±0.004 10
2009/03/23 ±0.010 35 ±0.005 20 ±0.004 10
2009/04/08 ±0.010 40 ±0.005 17 ±0.004 10
MR Del 2009/06/16 ±0.003 10 ±0.003 3 ±0.003 2
2009/07/29 ±0.003 25 ±0.003 4 ±0.003 2
2009/08/15 ±0.003 25 ±0.003 4 ±0.003 2
2009/09/25 ±0.003 20 ±0.003 8 ±0.003 3
BD 2009/08/07 ±0.003 30 ±0.002 9 ±0.002 5
+07° 3142 2009/08/09 ±0.003 30 ±0.002 9 ±0.002 5
2009/08/19 ±0.003 30 ±0.002 10 ±0.002 5
2009/08/31 ±0.003 35 ±0.002 10 ±0.002 6
2009/09/01 ±0.003 35 ±0.002 10 ±0.002 6

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