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| Weather clearing up. Some ice on legs and sub-reflector. Operator is going up. UT18:23. DAQ started around 19 UTC with 49/6/62 bad pixels for arrays 1/2/3, respectively. Calibration observations on the closest source 2251+158. A series of pointings/focus shows astigmatism with two lobes present at the final image, which might be caused from the recent stop of the de-icing. Eventually we moved to Uranus aiming for better calibration results. Carsten takes over. Good stability and tau around 0.2. | 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. |
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| 21:00-03:00; Carsten: | 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 0.17. El>35deg. p2p<~4Jy/b@2mm on all the hourly pointings. The COSMOS timelines did however show larger variations +-5 up to 20Jy/b. 12 scans done. |
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| 03:00-09:00; FXD: 2 hours on COSMOS. I did focus in between. Best is 18x19 arcsec at 2mm. p2p variations are well below +-3 Jy/b on pointing scans. Tau=0.2 stable. -10 degC. Cloudy. No Wind. 2 repeats on 199-16 PSZ2G084 before it's too high. Focus (12 and 18) OK then go to PSZ2-G046.1. 4 repeats 09:00-15:00; Antoine: 15:00-21:00; Gustavo: 21:00-03:00; Carsten: |
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Daily Reports
Contents
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 0.17. El>35deg. p2p<~4Jy/b@2mm on all the hourly pointings. The COSMOS timelines did however show larger variations +-5 up to 20Jy/b. 12 scans done.
Jan. 25th, Wednesday
03:00-09:00; FXD: 2 hours on COSMOS. I did focus in between. Best is 18x19 arcsec at 2mm. p2p variations are well below +-3 Jy/b on pointing scans. Tau=0.2 stable. -10 degC. Cloudy. No Wind. 2 repeats on 199-16 PSZ2G084 before it's too high. Focus (12 and 18) OK then go to PSZ2-G046.1. 4 repeats
09:00-15:00; Antoine:
15:00-21:00; Gustavo:
21:00-03:00; Carsten:
Jan. 26th, Thursday
03:00-09:00; FXD:
09:00-15:00; Antoine:
15:00-21:00; Gustavo:
21:00-03:00; Carsten:
Jan. 27th, Friday
03:00-09:00; FXD:
09:00-15:00; Antoine:
15:00-21:00; Gustavo:
21:00-03:00; Carsten:
Jan. 28th, Saturday
03:00-09:00; FXD:
09:00-15:00; Antoine:
15:00-21:00; Gustavo:
21:00-03:00; Carsten:
Jan. 29th, Sunday
03:00-09:00; FXD:
09:00-15:00; Antoine:
15:00-21:00; Gustavo:
21:00-03:00; Carsten:
Jan. 30th, Monday
03:00-09:00; FXD:
09:00-15:00; Antoine:
15:00-21:00; Gustavo:
21:00-03:00; Carsten: