(cba:news) December stars, and FS Aur
jop at astro.columbia.edu
Tue Dec 2 20:31:31 EST 2014
Thanks, Shawn. We have a couple of such states in past coverage - no
definite period, but enough to suggest (to me... but not nearly enough
to prove)a quasi-period of ~80 days. Outbursts quite small (1.5 mag?)
and quite brief (2 d?). Does that sound about right?
I have no idea if this star is *important*, but it sure is *unique*. An
orbital period of 1.4 hr, and a decent-amplitude, strictly periodic
photometric wave of 3.4 hours. Nuthin' like it in the sky, and way
different from the stars which dominate this orbital-period regime (the
dwarf novae and polars, probably 99% of the total). It just wiggles
away. What is it?
Could be a very rewarding target, if you don't mind a somewhat faint
star that doesn't do a helluva lot. Seriously! You'll definitely ask
yourself "is this really worthwhile?" The eclipsers and superhumpers
offer more immediate rewards.
On 12/2/2014 7:46 PM, Shawn Dvorak wrote:
> FS Aur is (was?) in a bright state. I caught what was probably the
> start of the outburst on the night of 11/29-30 when it started
> brightening around 11/30 05:30 UT and went from ~15.7 to 15.2CV in three
> hours. On the night of 11/30-12/01 it was steady at ~14.0CV. Nice 0.3
> mag variations that night, not obviously regular to casual inspection.
> Unfortunately it was cloudy here last night, and conditions are poor
> On 12/01/2014 01:50 PM, Joe Patterson wrote:
>> attached. Let me know if you can't read the pdf!
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