Night report 2017-08-22
Observers: David Homan, Joe Lyman
TAT: Morgan Fraser, Giorgos Leloudas
Support team: Morgan Fraser
Calibrations: biases, dome arcs
Conditions: Closed at start of night, heavy cloud cover. Quite high winds, ~10m/s. Passing clouds for the short duration dome was opened. Close for 2nd half of night due to thick clouds.
UT Target Type Comment
02:30 Dome opened under still poor conditions, switch to SOFI.
02:35 AT2017gah followup JHK - very marginal detection in J exposures only.
02:45 AT2017gah followup Started BG OB - no guide star and conditions very poor. Didn't start spectrum, instead repeated JHK for AT2017gah with extended OBs - clouds hit and nothing in exposures.
03:20 AT2017gah followup JHK again. Conditions improved a bit, good detection in individual J frames, seems to be there in HK
03:50 AT2016iks followup JHK. K band in particular was affected by incoming clouds
05:15 Nothing visible on all-sky cam. Wait out clouds.
05:40 Dome closed.
09:30 Dome opened.
09:35 AT2017gax followup JHK. JH detections in frames by eye, just about there in K
10:00 AT2017fzw followup JHK. J detections in frames by eye, just about there in HK