|
Size: 2105
Comment:
|
Size: 2465
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 8: | Line 8: |
| || [[NK2014_Oct10|Nika 2014-10-10 sheet4]] || link to summary table with plots || X hours observed / X hours scheduled || | |
| Line 17: | Line 18: |
| It was one of these nights... At the beginning, we were not seeing anything because M4 was not fixed properly. Then we had a hard time debug the our pointing code. In addition, the weather was not very nice, high opacity and rising, wind... making focus track also hard to get. We eventually tried our otf geometry on Uranus (not up in the sky at the beginning of the session) and found a very strong systematic effect while the HWP was rotating. Then we alternated between problems with the sky, the wind, extra noise with the HWP. We put and removed the polarizer, put and removed the prism to see how much the it blocked this systematic and reflect/absorb the signal. By a quicklook at the measured Uranus flux and previous knowledge by Andrea, Alain and Samuel, we confirm that the prism reflects about 25% and absorbs about 25% too. In the end, the MPPSync crashed so the HWP coult not be rotated any more. | It was one of these nights... At the beginning, we were not seeing anything because M4 was not fixed properly. Then we had a hard time debug the our pointing code. In addition, the weather was not very nice, high opacity and rising, wind... making focus track also hard to get. We eventually tried our otf geometry on Uranus (not up in the sky at the beginning of the session) and found a very strong systematic effect while the HWP was rotating. Then we alternated between problems with the sky, the wind, extra noise with the HWP. We put and removed the polarizer, put and removed the prism to see how much the it blocked this systematic and reflect/absorb the signal. By a quicklook at the measured Uranus flux and previous knowledge by Andrea, Alain and Samuel, we confirm that the prism reflects about 25% each face and absorbs about 25% too (=> ~40% global transmission). In the end, the MPPSync crashed so the HWP coult not be rotated any more. |
| Line 21: | Line 22: |
| We've worked on fixing the MPPSync, and we start our observing session, Alain is in the cabin trying to replug and relaunch it. | We've worked on fixing the MPPSync, and we start our observing session, Alain is in the cabin trying to replug and relaunch it. It's been fixed but we've had problems with the resonnances and the tuning all night, and bad weather. Lots of tests were performed on the instrument but few observations are available in the end. |
Day to day observation logbook
link to summary table with plots |
X hours observed / X hours scheduled |
|
link to summary table with plots |
X hours observed / X hours scheduled |
|
link to summary table with plots |
X hours observed / X hours scheduled |
|
link to summary table with plots |
X hours observed / X hours scheduled |
Quick summary of observations per day
Tuesday 7th
The beginning was a bit tough because Elvin considered we were GISMO where as all initializations were correct from the control room point of view. Juan Macias managed to twist our code to circumvent this and we could start observing. It took us then some time to tune the dectectors and retest the Real time analysis sequences. At some point, when we stopped the HWP, we lost the resonances at 1mm. In the last couple of hours, we installed the prism to have a first go with this kind of data.
Wednesday 8th
It was one of these nights... At the beginning, we were not seeing anything because M4 was not fixed properly. Then we had a hard time debug the our pointing code. In addition, the weather was not very nice, high opacity and rising, wind... making focus track also hard to get. We eventually tried our otf geometry on Uranus (not up in the sky at the beginning of the session) and found a very strong systematic effect while the HWP was rotating. Then we alternated between problems with the sky, the wind, extra noise with the HWP. We put and removed the polarizer, put and removed the prism to see how much the it blocked this systematic and reflect/absorb the signal. By a quicklook at the measured Uranus flux and previous knowledge by Andrea, Alain and Samuel, we confirm that the prism reflects about 25% each face and absorbs about 25% too (=> ~40% global transmission). In the end, the MPPSync crashed so the HWP coult not be rotated any more.
Thursday 9th
We've worked on fixing the MPPSync, and we start our observing session, Alain is in the cabin trying to replug and relaunch it. It's been fixed but we've had problems with the resonnances and the tuning all night, and bad weather. Lots of tests were performed on the instrument but few observations are available in the end.