CalibNika2Run14

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This page gather the information on the technical observations that are needed to perform NIKA2 calibration.

Pointing

The pointing model is to be checked on the first night of the campaign by means of a mini pointing session (about 10 sources), and if needed a complete session (minimum 15 sources, 30 is better). [Add here a summary of the pointing session(s)]

Beammaps

Beammap sequences, which are focus + pointing + beammap, are to be done at least once a day, spanning various elevation, at the best average focus (z central - 0.2 mm).

Beammap analysis status

The table below gathers the beammap scan ID, comments related either to the observing condition or to the reduced beammap quality and the analysis status

Status "done" means the analysis is completed, namely the kidpar file is produced using a 2-step iteration analysis, and uploaded in SVN.

Special beammap sequences

• For the optimization of the best average focus, a few series of beammaps at different axial focus in a row are needed: the focus settings to be spanned are z0 - 0.2mm, z0 - 0.3mm and z0 - 0.4mm.
• For the study of the elevation impact and the test of destriping methods, couples of beammap with orthogonal scanning startegy will be made (using @beammap99.. a (default) and e (along the elevation)).

Opacity

A skydip scan per 8-hour observation shift, in all possible weather conditions, is needed

Table of the Skydip scans

Calibrators

• Monitor primary and secondary calibrators. Few of them but repeatedly along the run and at various elevation
• Observe in priority MWC349: use the loop script comprizing 4 OTF scans, 3 times a day

• Observe also Uranus, Mars & Neptune + NGC7027 (and optionally CRL2688)

Below the visibility plot:

Table of secondary calibrator scans

Gain-elevation monitoring

Observe at least two complete spans of the elevation from about 20 to 80 degrees using 3C84

Table for gain curve task (3C84, i.e. 0316+413 in nikaw-17)