(cba:news) T Pyx, AM CVn, and VX For
jop at astro.columbia.edu
Thu Jan 21 09:15:18 EST 2021
A few comments re 2 old favorites, and one mystery star.
Runs by Josch and Gordon in the last few days suggest that T Pyx MAY
have sprouted a new low-frequency signal. I wouldn't call it likely...
but it's curious - and anyway, we're not supposed to miss anything about
THIS star! Very well-placed now; let's get some more runs and investigate.
AM CVn is back in the morning sky. Our paper is ~ready to fly, but some
early-season runs of >3 hours would help it.
VX For. In ~1990 I was on a long run in Chile, when this star first
erupted. I obtained long runs on 9 (I think) consecutive nights. To my
chagrin, the light curve was always ~flat. I wouldn't have stayed with
it, except that it sits next to a beautiful galaxy, and I loved staring
at that galaxy every 40 seconds. The spectrum clearly said "dwarf
nova", but I had never seen - and still haven't - seen a dwarf nova with
so little variability. And which didn't reveal at least a HINT about
Alas, nothing happened in the galaxy either.
It looks like I wrote about this star, when it erupted again in 2009...
and it's on Rod Stubbings' website. Anyway, we still know very little
about this fascinating star. A worthy target.
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