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(cba:news) 2021meetings... and WX Pyx (Joe Patterson) [2021-02-24T14:21:21Z]


Hi CBAers,

Thanks, Gordon and Bob, for that info re the 2021 SAS and AAVSO meetings. I certainly plan to attend both... and Bob, it would be good to have a breakout session for CBAers at the SAS meeting. Good chance for us all to meet, and for me to hear from you how I can support our common enterprise + you personally. I get a lot of benefit from all that data (the NSF loves citizen science)... so lemme know how I can support you.

WX Pyx is well placed now in the evening sky. Much better in the south, of course, but the periodic signals are quite strong and the star is a suitable target anywhere south of roughly +42 deg. In particular, we could approach round-the-world coverage if we had runs in the western USA. (I'm hoping Gordon and Peter will keep the vigil in Australia, too.) And you can slightly stretch our usual "2.0 airmass" rule - since it's *difference* in airmass that hurts, and this star never gets high for USA latitudes.***

joe

*** BTW you might ask "why not CORRECT for airmass?". Since I'm a huge fan of long runs, I've experimented a lot with this. On rare occasions I do; an extra (differential) extinction of ~0.1 mag/airmass works reasonably for the average CV and the average comp star. But if you get it wrong, then you've basically inserted a periodic signal into the data. So, on the principle "keepen das hands off das blinkenlights", I prefer not to mess around with that.
"

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