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Table 1

Histogram binning and resulting estimation of the background (here in count rates) for each observation ofNGC 1068.

Filter name Observation date and time Nbins Estimated background (10−4 s−1)
POL0 1995-02-28 05:33:12 6348 6.43
POL0 1995-02-28 06:07:33 2141 25.7
POL0 1995-02-28 07:07:54 5747 7.78
POL60 1995-02-28 07:37:16 4319 13.1
POL60 1995-02-28 08:44:26 6091 10.3
POL60 1995-02-28 09:06:15 6205 8.57
POL60 1995-02-28 10:22:57 4727 16.3
POL120 1995-02-28 10:37:59 8324 7.06
POL120 1995-02-28 12:05:37 8696 6.49

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