(cba:news) (cba:chat) V1974 Cyg

Joe Patterson jop at astro.columbia.edu
Mon Sep 1 22:06:08 EDT 2014


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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