Describe GoalsPrepStaffNika2TestRun54 here.

NIKA2 technical run #54 / September 2021

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Goals

Do a complete setup of NIKA2 in advance of the science runs starting in October 2021.

TO BE UPDATED

-- Sweep

-- beam map

-- skydip

-- secondary calibrators

Test polarization setup

TO BE UPDATED

-- planets and quasars

Test the external calibrator

TO BE UPDATED

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

[ATTACH]

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

[ATTACH]

Observers and Schedule

TO BE UPDATED

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 + Anaƫlle

+ Daily meetings on zoom at 4pm : https://us02web.zoom.us/j/81511665706?pwd=UlRleEpuWHEvN0pZZm9qTVAyT1NmZz09