CalibNika2Run16

Back to the NIKA2 4rd Science pool

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

First version created on Mars. 7th by Hervé Aussel, F.-Xavier Désert, Jean-François Lestrade, Juan Macias-Pérez, Frédéric Mayet, Laurence Perotto & Nicolas Ponthieu.

Pointing

A full pointing session (20 to 30 sources) to be done on the first night. Let's use Samuel's excell file to check the coverage in elevation and azymuth.

Beammaps

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

The best quality beammap should be achieved using 3C84 during the night at high elevation: notice we want to use these beammaps both for geometry and calibration purposes; You may consider also doing beammaps on planet if good conditions: good weather, high elevation, not at all during the afternoon

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

No special beammap tests are planned for this campaign as the Planet visibility is not favorable for testing subtle effects.

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 Uranus, which is NIKA2 primary calibrator: do a series of 2 OTF 8x5 scans, twice or 3 times a day
• Observe also Neptune and Mars using 2 8x5 OTF scans at constant elevation, twice a day
• Observe MWC349, NGC7027, CRL2688 for 4 OTF scans, high elevation, good weather, twice a day if possible

Below the visibility plot for Uranus, Mars, Neptune, 3C84, MWC349,[TBD, Juan]

Science Visibility plot

Table of OTF 8x5 scans of Uranus

Table of OTF 8x5 scans of other Planets (Mars and Neptune)

Table of OTF 8x5 scans of secondary calibrators (MWC349, NGC)

Gain-elevation monitoring

For this run we prefer to concentrate on primary and secondary calibrators.

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

Table for gain curve task (2251+158 in nikaw-17)