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RR Lyrae light curve, night 41
Six hours of photometry before cloud rolled in at 03:10; the 0.57-day period holds.
Spectrograph focus drift
Logged a 12 µm drift after the dome heater cycled. Workaround pinned for the queue.
Accepted: “Blue loops in nearby Cepheids”
Second author, with M. Tanaka and the Ridge variable star group.
Dark skies, bright towns
Public talk at Brecon library, 140 people, three new volunteers.
Comet C/2026 F2 astrometry
Twelve positions sent to the Minor Planet Center within the hour.
New flat-field routine
Twilight flats now take 9 minutes instead of 25. Script in the shared notebook.
Data release: Ridge Variable Survey DR3
4,812 light curves, calibrated and public.
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Ada Lindqvist, Rhys Pritchard and 4 others