From jop at astro.columbia.edu Tue Nov 20 05:05:53 2012 From: jop at astro.columbia.edu (Joe Patterson) Date: Tue, 20 Nov 2012 05:05:53 -0500 Subject: (cba:news) bk lyn paper Message-ID: <50AB5601.70601@astro.columbia.edu> Dear CBAers, Sorry for being inaudible these past few months. The expanding-universe conference... the resumption of teaching... the setbacks to teaching inflicted by the hurricane... writing this paper... and summer-fall 2012 flew by. But led by Enrique, I think that CBA observations haven't suffered much. In another 1-2 days I'll send comments on observing targets for the next few weeks. But I wanted to get this (draft) paper off my desk and into co-authors' hands before our national holiday this week. 1. I'll send the figures for this paper later today. That might be a rather big file, so I wanted to send separately. 2. Only ~6 of you sent postal addresses when I recently asked. Most of the journals nowadays ask for emails and postal addresses of co-authors. If you didn't already, send 'em. 3. It's possible the author list is incomplete. I based it on my observing notebooks, which might be a slightly incomplete record of our observations of this star. Don't be bashful - please tell me if I've left you out. 4. Unfortunately for me - and alas, to some extent for you too - I seem to be trapped in this pattern of studying a star for 10-20 years before publishing. Papers reporting 15-20 year campaigns on two other stars (GD 552 and T Pyx) are nearly complete - and I'll send 'em when done. Since we've had ~70 refereed CBA papers, I haven't always been so sluggish! I just get awfully fascinated by a few stars, and keep wanting to see what the next season will bring... But I promise to get more into reportage, and less into epic-writing. 5. As you'll see if you read this, I've gotten seduced by this idea that CVs don't really have a true "quiescence", but are just seen in various stages of decline from nova eruptions. So I'm inclined to invest heavily in observational programs on two types of stars: (a) Recent novae. We've been decently diligent about tracking them, but should now take this to a more intense level. (b) SW Sex and ER UMa stars. Obvious candidates as unrecognized recent novae. Let the time series rip. For both types of stars, I'll send specific suggestions within a few days (or later today). 6. Please send comments/corrections, and soon. I hope to send this off to the journals in about 2 weeks. joe -------------- next part -------------- A non-text attachment was scrubbed... Name: bk1120.odt Type: application/vnd.oasis.opendocument.text Size: 96570 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: bk1120.pdf Type: application/pdf Size: 279505 bytes Desc: not available URL: From jop at astro.columbia.edu Tue Nov 20 17:30:06 2012 From: jop at astro.columbia.edu (Joe Patterson) Date: Tue, 20 Nov 2012 17:30:06 -0500 Subject: (cba:news) bk lyn figures, and stars Message-ID: <50AC046E.5080700@astro.columbia.edu> Here are the scanned figures for the paper I sent earlier today. A couple are slightly botched, but anyway they should suffice for comments. I'm awfully keen to carry out this type of analysis for the other ER UMa stars, especially V1159 Ori since it's perfectly placed now and available to all hemispheres. We had a good campaign 20 years ago, and have a lot more firepower today! The ER UMa class has a thing for 9 hr right ascension: ER UMa, BK Lyn, RZ LMi, and DI UMa. Half the class! It's a tad too early in the season to get serious about these guys, but you might want to pick your favorite (I especially recommend the latter two) and start obtaining some time series. Then pick up the pace in a month's time. In general I'd say BK Lyn and ER UMa are slightly lower priority, because we covered them so thoroughly in the 2011-12 season. It is not, however, too early for T Pyx! Also 9 hr RA, but because the interest there is simpler (the possible existence and waveform of an orbital signal), there is no need for very long time series - a few hours per night is fine. It's time to see how the eruption has treated our precious pre-eruption orbital signal. I bet a few weeks of coverage from our powerful southern outposts (South Africa/Chile/NZ/AU will nail this quite nicely... and will separate that paper, too (17 years in the making), from the glue of my desk. Finally, I'd like to vigorously push PX And. Still very much in season, and likely another one of these two-brands-of-superhump characters. I'll be pushing a lot of Sex stars (its class) in the next months. I've been neglecting the dwarf novae. But Enrique has kept that flame going, and the Galaxy has furnished us with some pretty interesting ones in the last few weeks/months. I hope to catch up with all this activity over the holiday. So... V1159 Ori, T Pyx, PX And, and maybe some other ER UMa star. That's my short list for now. For a change, no DQ Her stars.... although they're always good targets when conditions are poor. joe -------------- next part -------------- A non-text attachment was scrubbed... Name: bkfigs.pdf Type: application/pdf Size: 437336 bytes Desc: not available URL: