= NIKA2 technical run #46 / November 10-17, 2020 =
[[Nika2Run46|Back to the NIKA2 Run 46 main page]] <<BR>>

== Goals ==
The overall goal is to complete the commissioning of the polarization capabilities of the NIKA2 camera, and make the first steps towards Science Verification. Following the data and their analysis from December 2018 and Feb 2020, the main priorities are:

- Confirmation of absolute angle calibration: on 3C286 + another QSO (chosen closer to dates depending on brightness/pol) also with XPOL observations, and on MWC349 (versus NOEMA?)

- XPOL sessions with Ioannis/Albrecht on 3C286 7h-9h on Thursday. If possible shared XPOL/NIKA2 on another QSO (3C454.3?) on Thursday evening ? - will adapt depending on weather/local conditions

- Stability of angle measurements and error bars with deep integrations on polarization standards, eg OMC1/DR21/Crab

- Evolution of Stokes Q/U rms with time with long integrations on known faint/extended sources to confirm tentative NEFDs obtained so far

- the two previous items will also allow to test our decorrelation methods developed for map-making on extended emission

- Get maps of polarization "leakages" using planets (Uranus) every night to evaluate the precision of correction in « real-conditions »

== Sources ==
 * '''Visibilities of science verif sources:'''

{{attachment:nika2sv-sources-Nov2020.png||height="500"}}

 
 * '''Strongly polarized quasars (>10% with POLAMI@1mm in past month):'''
 
-- The usual 3C286.

-- 0219+428 (I=0.5Jy, 12% on Sept. 29)= [[https://www.physics.purdue.edu/MOJAVE/sourcepages/0219+428.shtml|J0222+4302]] 

-- 0851+202 (I=2.7Jy, 11% on Oct. 14)= [[https://www.physics.purdue.edu/astro/MOJAVE/sourcepages/0851+202.shtml|OJ287]] 

-- 1127-145 (I=0.4Jy, 12% on Oct. 14)= [[https://www.physics.purdue.edu/astro/MOJAVE/sourcepages/1127-145.shtml|J1130-1449]]
 
 * '''NOEMA has only observed 1044+719 at 1mm the past 2weeks (and gives 2% polar)'''

 * '''Visibilities of quasars:'''

{{attachment:nika2sv-qso-Nov2020.png||height="500"}}




== Tools during the run ==
__PaKo:__

ssh -XY t22@mrt-lx1

goNIKAnew

set dosubmit yes

__PIIC NIKA2 data processing: __

Connect to mrt-lx3:

>ssh -XY nikas-20@mrt-lx3

>cd ql

>piic @monitorX # replace X with 1, 3, 2pf or 2m. 2pf is the fast queue to get the pointing and focus results immediately. This will automatically launch the data processing with the IRAM  monitor.

__IDL: __

ssh -XY observer@nika2-a

>idl

>nk_rta, "20201110sXXX"

__  '''Xephem'''__:

>ssh -XY t22@mrt-lx3

>useNCS

>xephem &

>antennaCSDataStreamViewer &

Test your vnc ! IRAM's howto for remote observations: http://mainwiki.iram.es/RemoteObservingGuide.

== Observers and Schedule ==
 * [[http://www.iram.fr/IRAMFR/PV/sche/20/s46v2.html|Telescope Schedule]] <<BR>>

 * 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:<<BR>>

3shifts of two people as follows (all times local time ie UTC+1h) :<<BR>> -- 18h-23h30: Philippe + Hamza <<BR>> -- 23h-4h30: Juan + Samuel (except night Sun15-Mon16 = Alessia takes Juan shift) <<BR>> -- 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.