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Daily Reports

Jan. 24th, Tuesday

16:00-21:00; Stergios: Maintenance finished around 16:00 (local time). Snowing and dense clouds prevent us from observing even with EMIR.

Weather clearing up, however ice is present on the legs and sub-reflector (18:23 UTC). Operator removed successfully the ice/snow from the antenna. DAQ started around 19:00 UTC with final measurements of 49/6/62 bad pixels for arrays 1/2/3, respectively. We continued with calibration observations on the pointing source 2251+158. A series of pointing/focus revealed some kind of astigmatism with two 'lobes' present at the final image, which might be caused from the recent stop of the de-icing. After many focus repetitions on this source the feature persisted. Eventually we moved to Uranus aiming for better calibration results. Carsten takes over. Good stability (peak-to-peak always below 3 Jy/beam) and tau around 0.2 at most times.

21:00-03:00; Carsten: De-iciung had been on till 19:00UT. Beam and Focus looked poor till about 22:00UT. Pointing and focus on Uranus OK. Skydip. calib_1scan. COSMOS started at 22:30UT. tau225~0.28 slowly improving to 0.19. El>35deg. p2p<~4Jy/b@2mm on the hourly pointings. The COSMOS timelines showed larger variations. 12 scans done.

Jan. 25th, Wednesday

Jan. 26th, Thursday

Jan. 27th, Friday

Jan. 28th, Saturday

Jan. 29th, Sunday

Jan. 30th, Monday

Jan. 31st, Tuesday