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Published online by Cambridge University Press: 07 August 2017
We have made spectroscopic and photometric observations of two close binary central stars of planetary nebulae HFG 1 (V 664 Cas) and A 63 (UU Sge), using the UH 2.2–m telescope (Mauna Kea Observatory) and the NAO 1.9–m and 0.9–m telescopes (Okayma Astrophysical Observatory).