(cba:news) stars for aug-oct
Joe Patterson
jop at astro.columbia.edu
Mon Aug 12 13:37:10 EDT 2024
Hi CBAers
Thanks so much for your messages of concern, and for the data you've
continued to send despite my long silence. My health is much better
now, and recent retirement from duties should give me more time to
devote to variable-star studies.
My highest-priority target is still V1674 Her. It's 8-minute pulse
continues apace... and since we have a CONTINUOUS record of its period
since the first week of outburst (and even before outburst), it's UNIQUE
among IPs. And may teach us how to understand the
sometimes-negative-sometimes-positive Pdot of the whole class. Keep
coverage until around October, and resume when it returns to the sky
around February.
For similar reasons, DQ Her is a good target. P=71s, so the observation
cycle time (on-source plus dead) needs to be <~20s. For both stars,
it's advantageous to string together consecutive nights, which will
improve timing accuracy.
For non-IP targets, don't forget T Pyx and IM Nor (assuming the season
and your latitude are appropriate. And AM CVn (for next February) and
V1500 Cyg (for northerners right now) we have in-progress studies which
could complete in more good season.
I expect to be MUCH more responsive to email starting now!
joe
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