### OBSDATE ### 20140705 ### LOGDATE ### 140705 ### OBSERVERS ### Kim Ward-Duong and Yitping Kok (via Skype) ### WEATHER ### Mostly clear, low wind, moderate humidity (53%) at beginning, increasing to 81% by 10:30 pm. A few high thin clouds that became significantly worse and prevented observations around 11 pm. ### LOCATION ### Home ### PROGRAM ### Nearby B-star multiplicity survey (KWD) ### SIDEROSTATS ### n3 s2 ### TARGETS ### HR 4853 - first test target HR 5646 - B-star, visual binary on camera HR 5695 - cal. HR 5646 HR 5354 - cal. HR 5646 HR 5695 - cal. HR 5646 HR 5354 - cal. HR 5883 - B-star HR 5695 - cal. HR 5583 HR 5471 - cal. HR 5883 HR 5695 - cal. HR 5883 HR 5471 - cal. HR 7039 - B-star HR 7254 - cal. HR 7039 - clouds came in! -> quite poor data HR 7254 - again, very cloudy, only 40s of data before the flux dropped to too low levels to continue. ### QUALITY ### Very good (several calibrated points) Average ### PROBLEMS ### The cross-hair issue (fake SUSI lock) on the ACQLABJACK camera occurred again, but resetting the origin after reacquiring seemed to fix it. The N3 camera had large offsets due to this; losing the star in PAVO was solved by turning the tip-tilt auto servo off, then tracking with N3, spiral searching, tracking with ACQLABJACK and setting that to park once the star got into PAVO. Otherwise, most acquisition issues/finding false fringes solved by stopping the siderostats, tracking again, and reacquiring in ACQLABJACK. Really great fringes at the beginning of the night, but the clouds came in quite quickly near the end.