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Table 7:

Variability of 00291+59 and a faint field star.

Date
--- Field star --- ------------- 00291+59 ------------
  mean mag 1$\sigma $ range mean mag 1$\sigma $ range Significance of variability Variability level1

15 Aug.
i' = 19.127 0.014 i' = 18.016 0.043 3.2 $\sigma $ $43 \pm 14$
  r' = 19.172 0.029 r' = 17.833 0.041 1.4 $\sigma $ <130
16 Aug. i' = 19.121 0.028 i' = 18.043 0.045 1.6 $\sigma $ <130
  r' = 19.188 0.042 r' = 17.954 0.048 1.2 $\sigma $ <170
17 Aug. i' = 19.094 0.038 i' = 18.447 0.086 2.3 $\sigma $ $86 \pm 38$
  r' = 19.144 0.070 r' = 18.296 0.057 0.8 $\sigma $ <270
18 Aug. i' = 19.109 0.033 i' = 18.935 0.079 2.4 $\sigma $ $79 \pm 33$
19 Aug. i' = 19.118 0.032 i' = 19.378 0.077 2.4 $\sigma $ $77 \pm 32$
25 Sep. i' = 19.139 0.023 i' = 18.206 0.026 1.0 $\sigma $ <110
29 Sep. i' = 19.140 0.030 i' = 18.543 0.033 1.1 $\sigma $ <120

Notes. (1) The level of variability in milli-mag (when it is detected at the >2$\sigma $ level), or 3$\sigma $ upper limit.


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