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| === Do a complete setup of NIKA2 in advance of the science runs starting in October 2021. === === Test polarization setup === === Test the external calibrator === The previous test was successful and we have learned a lot. The signal is well detected (Pi-Pq) 100 Hz @ 1mm and 800Hz @ 2mm. But, using the HWP, it seems very weakly polarized (<1%) whereas it is expected to be fully polarized at 1mm. In order to exclude various scenarios, we need to repeat the tests, essentially made of skydips. A session of 2-3 hours max will be necessary that should be contiguous with the polarisation session so as to be in the fast acquisition mode. Skydip should be modified so as to include 90 degrees step. - Do a skydip without the source on but with the pi-pq mode, in order to test if we find 0 - Do a skydip with source @1mm on - Do a skydip with source @2mm on - Do a skydip with both sources on. |
Describe GoalsPrepStaffNika2TestRun54 here.
NIKA2 technical run #54 / September 2021
Back to the NIKA2 Run 54 main page
Goals
Do a complete setup of NIKA2 in advance of the science runs starting in October 2021.
=== Test polarization setup === === Test the external calibrator === The previous test was successful and we have learned a lot. The signal is well detected (Pi-Pq) 100 Hz @ 1mm and 800Hz @ 2mm. But, using the HWP, it seems very weakly polarized (<1%) whereas it is expected to be fully polarized at 1mm. In order to exclude various scenarios, we need to repeat the tests, essentially made of skydips. A session of 2-3 hours max will be necessary that should be contiguous with the polarisation session so as to be in the fast acquisition mode. Skydip should be modified so as to include 90 degrees step.
- Do a skydip without the source on but with the pi-pq mode, in order to test if we find 0 - Do a skydip with source @1mm on - Do a skydip with source @2mm on - Do a skydip with both sources on.
Sources
Visibilities of science sources:
![[ATTACH]](/GoalsPrepStaffNika2TestRun54?action=AttachFile&do=upload_form&ticket=00662ea9f2.7c32c2530acc2c69db71ee6cb800fab4d4f5e99f&target=nika2sv-sources-Nov2020.png "[ATTACH]"){kind=small}
Strongly polarized quasars (>10% with POLAMI@1mm in past month):
TO BE CHECKED
-- The usual 3C286.
-- 0219+428 (I=0.5Jy, 12% on Sept. 29)= J0222+4302
-- 0851+202 (I=2.7Jy, 11% on Oct. 14)= OJ287
-- 1127-145 (I=0.4Jy, 12% on Oct. 14)= J1130-1449
NOEMA has only observed 1044+719 at 1mm the past 2weeks (and gives 2% polar)
Visibilities of quasars:
![[ATTACH]](/GoalsPrepStaffNika2TestRun54?action=AttachFile&do=upload_form&ticket=00662ea9f2.7c32c2530acc2c69db71ee6cb800fab4d4f5e99f&target=nika2sv-qso-Nov2020.png "[ATTACH]"){kind=small}
Observers and Schedule
TO BE UPDATED
Due to the Covid pandemic there's no travel at the telescope, observations will be on remote with the help of the remote AOD and Operators at the telescope. List of the remote observers and the shifts we agreed on:
3shifts of two people as follows (all times local time ie UTC+1h) :
-- 18h-23h30: Philippe + Hamza
-- 23h-4h30: Juan + Samuel (except night Sun15-Mon16 = Alessia takes Juan shift)
-- 4h-9h: Nicolas + Anaëlle
+ Daily meetings on zoom at 4pm : https://us02web.zoom.us/j/81511665706?pwd=UlRleEpuWHEvN0pZZm9qTVAyT1NmZz09
Ioannis/Bilal are the AoD, see IRAM's http://www.iram.es/IRAMES/mainWiki/AstronomersOnDutySchedule.