AAVSO: American Association of Variable Star Observers

B, V Observations and Analyses of the EW Stars NY Boötis and V508 Cygni

Volume 50 number 2 (2022)

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Andreas Beck
Schickhardtstraße 59, 71116 Gärtringen, Germany; Andreas.Beck@HFT-Stuttgart.de
Laurent Corp
56 Avenue de Paris, 12000 Rodez, France; astro.laucorp@orange.fr
Gerard Samolyk
P. O. Box 20677, Greenfield, WI 53220; gsamolyk@wi.rr.com

Abstract

This paper describes the acquisition of CCD-derived photometric data from two eclipsing overcontact binaries, NY Boo and V508 Cyg. Astrophotography filters (blue and green) were used, but measurements were transformed to the Johnson-Cousins standard using the reference star fields in M67. Aside from producing period-folded light curves for both variable systems, new times-of-minimum were added to other literature values in order to update each ephemeris.