[Aavso-photometry] NU Cyg

[Keith Graham]

Hi,

I have run up against a brick wall and hope someone on this list can point mein the right direction.

I have been doing some TS photometry on the EB star NU Cyg. I am detecting about a 30 minute time differential between the ephemeris minima (both P & S) and my observed minima.  I began collecting data for this star on JD 2454402. I need to get the calculated times for P & S minima from that date forward. The only emphemeris I can even find this star on is the one located at http://www.as.ap.krakow.pl/ephem/. When I first began observing it, I did not record the calculated P & S minima times from the ephemeris because I really was not looking for any time differential.  But now that I appear to have detected an approx 30 minute differential, I would like to verify it. So, does anyone know where I might find past calculated minima for this star (or any others, for that matter)? I have contacted Gerry Smolyk, but he indicated that he had no data on this star.

Thanks for any helpyou can offer.

Cheers,

Keith Graham
GKA