(cba:news) menu for february-march 2021
jop at astro.columbia.edu
Tue Feb 23 13:55:48 EST 2021
Special interest in these far-southern stars for the next 6 weeks:
NR TrA, WX Cen, IM Nor. All stars for which we have ongoing
*orbital-period* studies. For that reason, time resolution is not so
Nor is quality of night, if it's decently clear. LENGTH of run matters;
>3 hrs highly desirable. HZ Pup is still desirable, but we're almost
finished with it.
In the north, here's the basket of desirables: AM CVn, BH Lyn, V1062
Tau> Long-term studies ongoing for all. AM CVn will especially reward
*density* of coverage - as much as you can in a few weeks. (That should
finish the 30-year study.) BH Lyn is an orbital + superhump study, so
will reward length of run. No special advice re V1062 Tau; we know only
the broad picture (periodic signals of 1 and 10 hiurs), and seek mainly
to close the season's coverage of the 1-hour signal.
And four stars pretty close to the celestial equator:
HP Lib - some 2-3 hour runs to start the season.
VZ Sex and WX Pyx - good long runs.
YY Sex - just 2-3 runs through an I or R filter. Our data show
abundantly that this star ia misclassified; but to publish it, we need
to get a very accurate period as well as straighten out the
classification (AM Her).
I'm not aware yet of the 2021 plans for amateur-astro meetings (mainly
SAS and AAVSO). Can someone knowledgeable write to cba-news or -chat
with this info?
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