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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)]
  
A full pointing session was executed on the first night, from scans 20180116s116 to 20180116s156, interrupted to do a gain-elevation measurement on 3C84, and resumed from scans 20180116s168 to 20180117s19., with 34 measurements in total. Overall, the pointing at 2mm where of good quality. During that night, the beam was very stable with FWHM values at 1mm of 11.3” and 17.6” @ 2mm, the focus did not change much. Data has been sent to Juan Penalver and Albrecht Sievers
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|| 20180117s92 || Mars || 7:56 a.m. || 35 deg || z0 - 0.2 || || || ||
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|| 20180116 || 111-114 || 20:55-21:17 || 76-73 deg || otf 8x5 || || 20180116 || 111-114 || 20:55-21:15 || 76-73 deg || otf 8x5 ||
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|| 20180117 || 39-42 || 2:45-     || 14- deg || otf 8x5, focus set by hand without having used @focusOTF-Z, but we checked the focus was stable (no sizeable change) afterwards || || 20180117 || 39-42 || 2:45-3:00 || 14- deg || otf 8x5, focus set by hand without having used @focusOTF-Z, but we checked the focus was stable (no sizeable change) afterwards ||
|| 20180117 || 300-303 || 22:45-23:00 || 56- deg || otf 8x5 ||

Back to the NIKA2 2nd Science pool

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

Pointing

A full pointing session was executed on the first night, from scans 20180116s116 to 20180116s156, interrupted to do a gain-elevation measurement on 3C84, and resumed from scans 20180116s168 to 20180117s19., with 34 measurements in total. Overall, the pointing at 2mm where of good quality. During that night, the beam was very stable with FWHM values at 1mm of 11.3” and 17.6” @ 2mm, the focus did not change much. Data has been sent to Juan Penalver and Albrecht Sievers

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.

observing condition

analysis status

scan ID

source

UT

elevation

comments

analyser ID

data quality

status

20180115s108

Uranus

2:10 p.m.

35 deg

closest focus scan 15s106

20180115s109

Uranus

2:35 p.m.

39 deg

scan in elevation (constant azymuth)

20180115s122

Uranus

4:00 p.m.

54 deg

closest focus scan 15s120

LP

v0 done

20180115s123

Uranus

4:25 p.m.

57 deg

z0 - 0.1

20180115s124

Uranus

4:50 p.m.

60 deg

z0 - 0.3

20180115s125

Uranus

5:15 p.m.

61 deg

z0 - 0.4

20180116s68

Uranus

5:04 p.m.

61 deg

z0 - 0.2

20180117s92

Mars

7:56 a.m.

35 deg

z0 - 0.2

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

Dates

scan #

tau225

comment

20180116

69

0.3

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:

Science Visibility plot

Table of secondary calibrator scans

Dates

scan #

source

elevation

comment

20180116

82-85

MWC349

29-26

otf 8x5

20180116

102-105

Uranus

45-44

otf 8x5

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)

Dates

scan #

UT

elevation

comment

20180116

111-114

20:55-21:15

76-73 deg

otf 8x5

20180116

163-167

23:30-23:40

48-46 deg

otf 8x5

20180117

35-38

2:30-2:45

17-14 deg

otf 8x5, OUT OF FOCUS

20180117

39-42

2:45-3:00

14- deg

otf 8x5, focus set by hand without having used @focusOTF-Z, but we checked the focus was stable (no sizeable change) afterwards

20180117

300-303

22:45-23:00

56- deg

otf 8x5

CalibNika2Run14 (last edited 2018-02-08 10:47:36 by NikaBolometer)