BI CVn – A spotted, overcontact, type-W eclipsing binary

V2477 Cyg -- A W-Type Contact Eclipsing Binary

“…However the point is that it is at least plausible that the light time effect exists and that the point at 0,0 is not aberrant. The O − C file may be found online at Nelson (2016).…”

“…Radial velocities were determined using the Rucinski broadening functions (Rucinski 2004, Nelson 2010b, Nelson et al 2014). An Excel worksheet with built-in macros (written by him) was used to do the necessary RV conversions to geocentric and back to heliocentric values (Nelson 2010a).…”

V736 Cephei - An A-Type Overcontact Binary

“…As part of the HD catalogue, it was classified presumably by Cannon and Pickering (1993) as F8. The first relevant reference is to Otero et al (2005) who provided coordinates, elements (epoch and period), apparent reference to the above classification, and an eclipse type (EA). Since then, there have been numerous eclipse timings published, but no light curve or analysis.…”

Direct Distance Estimation and Absolute Parameters of Z Draconis

“…The wavelengths ranged from 5000 to 5260Å, approximately. Frame reduction was performed by software RaVeRe (Nelson 2013). See Nelson (2010) and Nelson et al (2014) for further details.…”

“…Frame reduction was performed by software RaVeRe (Nelson 2013). See Nelson (2010) and Nelson et al (2014) for further details. Radial velocities were determined using the Rucinski broadening functions (Rucinski, 2004, Nelson, 2010 as implemented in software Broad (Nelson, 2013;Nelson et al 2014).…”