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Table 5

CCD observations of the program stars.

Date JD (2 400 000) I errI R errR V errV B errB Tel CCD Observatory

1997 Jun. 01 50 601.491 15.07 0,01 16.44 0.02 17.64 0.02 19.26 0.04 2 m Phot Rozhen
2003 Sep. 27 52 910.375 15.04 0.01 16.50 0.02 17.75 0.03 18.96 0.14 Sch ST8 Rozhen
2008 Jun. 28 54 646.366 15.02 0.01 16.46 0.01 17.61 0.01 19.21 0.02 1.3 m ANDOR Skinakas
2010 Oct. 30 55 500.215 14.89 0.01 16.13 0.01 17.49 0.01 19.15 0.02 2 m VA Rozhen
2012 Aug. 13 56 152.624 14.96 0.02 16.32 0.03 17.36 0.04 18.76 0.13 1.3 m ANDOR Skinakas
........

Notes. The full table is available at the CDS. A small portion of data for the star V1716 Cyg is shown here for guidance regarding its form and content.

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