Chatted with Holmes about his thesis chapter about ubercalibration; chatted with Bovy about his results on the Milky-Way disk as observed by SEGUE; filed tickets against the new web version of Astrometry.net. Late in the day, Lang and I got onto fitting the polynomial distortion terms in the HST ACS instrument; the official distortion map only goes to fourth order (if I remember correctly) but we see what look like systematic effects at higher orders.
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