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(cba:news) stars for late July (Joe Patterson) [2015-07-27T17:48:01Z]


Dear CBAers,

Attached is the almost-final UX UMa paper. I'll send the figures separately Wednesday. I have most of the contact and observing-log info right now, but certainly not all - please correct me. And UX UMa is off the menu for sure.

I still haven't decided re IGR J1955+00 - I think Enrique will send advice re that. It certainly is fascinating - but we may have reached the limit of what we'll learn. But maybe not...? A few more nights is probably a good idea.

There are a few seasonally-appropriate stars where we have gathered almost enough data to complete our study - but not quite. These are V1315 Aql, V380 Oph, and V1974 Cyg. It would be great to amass about 2 solid weeks of coverage on them. Those are the stars I recommend now for lengthy coverage.

It's also a very good season for coverage of DQ Her stars (intermediate polars). I especially recommend, V2306 Cyg, V2069 Cyg, RX1654-19, V1223 Sgr, and IGR 1817-25. As always, Koji Mukai's intermediate-polar website is a great reference for these stars:

http://asd.gsfc.nasa.gov/Koji.Mukai/iphome/iphome.html

As most of you know, the DQ Hers are good targets for the occasional night here and there - whereas the novalikes/old novae especially repay very frequent, tightly clustered observation.

Finally, here are some seasonally-appropriate easy targets: V Sge, FO Aqr, AO Psc (V1223 Sgr is borderline in this category too). The goal for those guys is a *long*-term ephemeris, and they're bright - so they're very good targets for people getting started in this enterprise (or for people with few opportunities).

Good luck!

joe

Attachment: uxpap726.pdf
Description: Adobe PDF document

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