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Re: (cba:news) (cba:chat) V1974 Cyg (Joe Patterson) [2014-09-02T02:08:20Z]


Thanks, Enrique, and your assessment sounds very great all around. I will say, though, that another 2-3 nights of V1974 Cyg (from any longitude) would complete the year's work on it - and secure enough accuracy to pinpoint the orbital wave.

V1101 Aql is beautiful and will remain very important for at least another month.

And QR And has gone into a very high state, crashing onto our menu for the first time.

In the south, Gordon Myers has been covering VZ Scl for some time... and I think it should replace CC Scl as a prime southern target. ES Ceti is also a very timely now... and V1223 Sgr is ready for retirement.

Much more detail in a couple days.  First class of the semester is tomorrow!

joe


On 9/1/2014 8:09 PM, Enrique de Miguel wrote:
Jim,

  The main idea with V1974 Cyg was to track the orbital wave, and my partial analysis shows that the light curve is dominated by a common superhump, with the orbital modulation being weaker and not too well defined. I stopped coverage waiting for Joe to decide if we should keep faith on this one.

   There are many targets out there, though (of course ....). The new eclipsing SU UMa-type star, ASASSN-13cx, is a good choice: it's always interesting to characterize an eclipsing system. Bill seems to be taking care of the US coverage tonight. For coming nights,
during the outburst, it may be a good idea to ensure US coverage, either from Bill or from someone else.

The usual summer IPs are always good choice.

   Data are still needed for V1101 Aql to confirm that the long-term modulation has increased from ~16 d in 2013 to ~20 d in 2014.
Joe U., Marlin, and others in the US, and Tomás in Europe are taking excellent, nightly coverage of this target.

  Until Joe P. comes up with a new menu, I would suggest this new SW Sex star, J0107+4845 (01:07:42.6 +48:45:19). Easy target,
with a ~2.2 mag eclipse (Porb = 0.1936 d) and out-of-eclipse mag of ~15.1. I've got several long runs, and the system seems to show a short-term  modulation clearly visible out of the eclipse. It can be flickering, but I'm suspecting this is something else (rotation of the
WD?). Anyway, some (all-night) runs from the other side will help.

Enrique




On Sep 1, 2014, at 10:18 PM, Jim Jones wrote:

I've been out of action for a few days because of the weather.  Is there still interest in V1974 Cyg?  I don't see any observations over the last several days.

Hopefully I'm back in the mix for awhile now.

Jim Jones
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