(cba:news) v407 Lup, back to the battle!
jop at astro.columbia.edu
Fri Sep 15 04:42:16 EDT 2017
I had planned to wait until next year to present our results on V407
Lup, the 2016 classical nova - namely, the 9-minute and 3.5 hour
periods. But a recent ATel (Astronomical Telegram) announces these
detections in the X-ray. With much coarser accuracy than our results,
of course, since they're based on short-baseline data in the X-ray.
So now we should come clean right away! Either in the form of another
ATel, or in a very brief published paper. Therefore let's put it back
on the menu, for our southern observers, with highest priority.
The 9-minute oscillation appears complex - probably not just one stable,
constant-frequency-and-amplitude signal. In order to decipher this
complexity, it's important that we get as close as possible to 24-hour
coverage. 24-hours is impossible since Lupus is way out-of-season, but
Berto and Gordon have done well with this 15.5 mag star, and we can
probably do well enough to decipher the period structure - unless the
period(s?) is/are actually not stable. (If that's so, nothing will save
So: back to work on V407 Lup, with gusto!
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