Hi CBAers,Attached is the quick-and-dirty paper on OV Boo, needed for the AAVSO/SAS conference. A few typos and other small errors... and to be followed by a proper paper in mid- or late-year.
OV Boo is still a great target and, with its never-say-die superhumps and sharp eclipse, will probably remain so throughout the observing season.
But it's time for some ole's concerning other targets, especially in the southern hemisphere. I'll send out a more complete list later today, but here goes.
ASASSN-17fp (18 08 51.10 -73 04 04.2) is a sure winner, if it's still bright (it was yesterday!). 51-minute AM CVn stars are a puzzle, and all the more so when they erupt. Top priority, since it's the first eruption, and since theory suggests they should be VERY rare.
ASAS-SN14ag is the other (08 13 18.52 -01 03 29.5). Admittedly way out of season, but with 90 minute eclipses, I bet we can get a few before the season ends. Worth fighting an airmass battle a little more than usual, if the night permits. Probably around 16th mag.
And V382 Vel, another good early-night target. One of the best in our nova-watch program, but which we've neglected recently.
NR TrA is another good target to start the season on.And it's time to end coverage on IM Nor and NY Lup. "Mission accomplished" on these guys!
All of these targets call for the usual CBA approach - long time series in unfiltered light. If your CCD has a lot of UV sensitivity, then a minus-UV or even minus-blue filter would be nice (basically always) - because with our emphasis on *long* light curves, atmospheric extinction can be a problem.
joe p -------- Forwarded Message -------- Subject: ASASSN 17-fp: 51-minute periodic variations (ATel #10354) Date: Sun, 7 May 2017 07:59:22 +0000 (UTC) From: Patrick Schmeer <extpasc@xxxxxxxx> Reply-To: Patrick Schmeer <extpasc@xxxxxxxx> To: CBA Chat <cba-chat@xxxxxxxxxxx>CC: Joe Patterson <jop@xxxxxxxxxxxxxxxxxx>, Enrique de Miguel <edmiguel63@xxxxxxxxx>
ASASSN 17-fp shows 51-minute periodic variations: http://www.astronomerstelegram.org/?read=10354 "Further coverage of the present outburst while ASASSN-17fp remains bright is strongly encouraged." Clear skies, Patrick
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