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Table 1.

Observation log.

Object g magnitude Observation date Exp. time (s) S/N @ 450 nm
SDSS J232854.99+023924.5 18.84 2017-06-03T08:10 3300 25
SDSS J113207.12−082657.3 18.16 2017-06-21T00:16 1800 20
SDSS J002314.00+030758.0 17.91 2017-06-30T09:34 1800 31
SDSS J144551.13−004541.3 18.85 2017-07-16T00:49 3300 25
SDSS J003730.31+245750.6 18.67 2017-08-23T07:31 2700 20
SDSS J003730.31+245750.6 18.67 2017-07-22T07:21 2700 15
SDSS J162049.87+322323.2 18.00 2017-07-22T00:17 1800 35
SDSS J002314.00+030758.0 17.91 2017-07-21T08:56 1800 25

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