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== Calibration observation plan ==

Draft discussed in ’Tiger Team’ meeting with Hervé, Nico, Juan, Martino, Jean-François, Samuel & Laurence

 1. Alignment checks
    * to do if the first pointing sequence (pointing, focus, pointing) is off-source
    * check the alignment using the laser on Monday before the campaign
    * if beammaps are not good despite a good weather, a better matching of the optical and radial axis can be tempted (using the ecosorb)
 1. Mini pointing session
    * to be done the first night of the campaign
 1. Beammap at optimal axial and lateral focus
    * perform a beammap sequence, focus + pointing + beammap, at least once a day
    * span various elevation
    * if good weather try and use lateral focus corrections from the maps of the residual after subtraction of a Gaussian beam
    * do a few series of beammaps at different axial focus in a row: at z0 - 0.2mm, z0 - 0.3mm and z0 - 0.4mm
 1. Opacity
    * several skydips a day in all possible weather conditions, basically one per 8-hour shift
 1. Calibration
    * Monitor primary and secondary calibrators. Few of them but repeatedly along the run and at various elev.
    * 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)
 1. Gain elevation correction
    * at least two complete spans of the elevation from about 20 to 80 degrees using 3C84


This page gather the information on the technical observations that are needed to perform NIKA2 calibration.
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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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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). If the weather conditions are good enough, lateral focus corrections can be implemented as well, using the maps of the residual after subtraction of a Gaussian beam. 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).
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|| '''Scan ID''' || '''analyser initials''' || '''comments''' || '''status''' ||
|| 20171030s268 || LP || Uranus, obs. date is 11:15 p. m., elev about 60 deg, finished 30 min. before a crash of the main pump, A1 has 12.5 arcsec average fwhm|| done ||
|| |||||||| ''' observing condition ''' |||||| '''analysis status''' ||
|| '''scan ID''' || ''source''|| ''UT'' || ''elevation'' || ''comments'' || ''analyser ID'' || ''data quality'' || ''status'' ||
|| 20180115s108 || Uranus || 14:10 || 35 deg || closest focus scan 15s106 || HA ||V0 done, 2mm seems OK, 1mm no., show rotation difference azel to nasmyth measured and fitted, bof... || ||
|| 20180115s109 || Uranus || 14:35 || 39 deg || scan in elevation (constant azymuth) || || || ||
|| 20180115s122 || Uranus || 16:00 || 54 deg || closest focus scan 15s120 || LP || v0 done, usable || ||
|| 20180115s123 || Uranus || 16:25 || 57 deg || z0 - 0.1 || HA || || ||
|| 20180115s124 || Uranus || 16:50 || 60 deg || z0 - 0.3 || LP || || ||
|| 20180115s125 || Uranus || 17:15 || 61 deg || z0 - 0.4 || || || ||
|| 20180116s68 || Uranus || 17:04 || 61 deg || z0 - 0.2 || || || ||
|| 20180117s92 || Mars || 07:56 || 35 deg || z0 - 0.2 || HA, BL, LP || v0 done, promizing! v2: avg FWHM=12.4, 12.2, 18.2 and number of valid KIDS = 869, 758 and 454 for A1, A3 and A2 || done ||
|| 20180118s205 || Uranus || 18:00 || 62 deg || tau225=0.35, Huge beams right after the beammap: focus drift || HA || v0 done, wavy kid positions. Bof... || ||
|| 20180119s73 || Jupiter || 06:55 || 36 deg || tau225=0.4 || || || ||
|| 20180119s74 || Mars || 07:20 || 34 deg || tau225=0.4 || LP || abnormal refraction || ||
|| 20180121s92 || Mars || 07:05 || 33 deg || tau225=0.2 || LP || v0 done, abnormal refraction : not usable || ||
|| 20180122s82 || Mars || 07:34 || 34 deg || tau225=0.15 || LP || v2: avg FWHM = 12.4, 12.2, 18.2 and nb of valid KIDS = 864, 736, 439 for A1, A3 and A2 || done ||
|| 20180122s309 || 3C84 || 23:20 || 41 deg || tau225=0.16 || HA || V0 done, usable. V2 done, FWHM 12”, 18” OK. usable. Recalibration using 3C84 flux TBD || done ||
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''Table for gain curve task (3C84, i.e. 0316+413 in nikas-17)'' ''Table of the Skydip scans''
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|| Dates || scan # || tau225 || comment ||
|| 20180112 || || || ||
|| ''Dates'' || ''scan #'' || ''tau225'' || ''UT'' || ''comment'' ||
|| 20180115 || 110 || 0.16 || 14:58 || ||
|| 20180115 || 126 || 0.14 || 17:40 || ||
|| 20180116 || 69 || 0.33 || 17:30 || ||
|| 20180117 || 20 || 0.22 || 00:51 || ||
|| 20180117 || 195 || 0.12 || 15:38 || ||
|| 20180118 || 31 || 0.16 || 02:49 || ||
|| 20180118 || 197 || 0.34 || 17:06 || ||
|| 20180119 || 8 || 0.36 || 01:24 || ||
|| 20180119 || 71 || 0.41 || 06:32 || ||
|| 20180119 || 129 || 0.31 || 12:22 || ||
|| 20180119 || 228 || 0.23 || 17:32 || ||
|| 20180120 || 58 || 0.17 || 05:17 || ||
|| 20180120 || 188 || 0.25 || 18:34 || ||
|| 20180121 || 93 || 0.21 || 07:28 || ||
|| 20180122 || 135 || 0.16 || 12:10 || ||
|| 20180122 || 212 || 0.15 || 16:07 || ||


== 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:

{{attachment:Visibility_calib.pdf | Science Visibility plot | width=850}}

''Table of OTF 8x5 scans of primary calibrators''

|| Dates || scan # || source || elevation || comment ||
|| 20180116 || 102-105 || Uranus || 45-44 || otf 8x5 ||
|| 20180117 || 282 + 284-287 || Uranus || 30-26 || otf 8x5 ||


''Table of OTF 8x5 scans of secondary calibrators''

|| Dates || scan # || source || elevation || comment ||
|| 20180116 || 82-85 || MWC349 || 29-26 || otf 8x5 ||
|| 20180118 || 65-68 || MWC349 || || otf 8x5 ||
|| 20180119 || 187-191 + 193-196 || MWC349 || || otf 8x5 ||
|| 20180120 || 169-172 || MWC349 || || otf 8x5 ||
|| 20180121 || 113-116 + 117-120 || MWC349 || || otf 8x5 ||
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''Table for gain curve task (3C84, i.e. 0316+413 in nikas-17)'' Observe at least two complete spans of the elevation from about 20 to 80 degrees using 3C84
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|| Dates || scan # || UT || elevation || comment ||
|| 20180116 || || || || otf 8x4 ||

''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, scan 300: RTA crashed with error "end of file encountered in the imbfits file" ||

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

|| Dates || scan # || UT || elevation|| comment ||
|| 20180119 || 108-111 || 10:10|| 20 deg || otf 8x5 ||
|| 20180121 || 149-152 || 12:30|| 50 deg || otf 8x5 ||
|| 20180119 || 182-186 || 15:21|| 70 deg || otf 8x5 ||
|| 20180120 || 184-186 || 18:30|| 45 deg || otf 8x5 ||
|| 20180120 || 208-211 || 20:20|| 20 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

14:10

35 deg

closest focus scan 15s106

HA

V0 done, 2mm seems OK, 1mm no., show rotation difference azel to nasmyth measured and fitted, bof...

20180115s109

Uranus

14:35

39 deg

scan in elevation (constant azymuth)

20180115s122

Uranus

16:00

54 deg

closest focus scan 15s120

LP

v0 done, usable

20180115s123

Uranus

16:25

57 deg

z0 - 0.1

HA

20180115s124

Uranus

16:50

60 deg

z0 - 0.3

LP

20180115s125

Uranus

17:15

61 deg

z0 - 0.4

20180116s68

Uranus

17:04

61 deg

z0 - 0.2

20180117s92

Mars

07:56

35 deg

z0 - 0.2

HA, BL, LP

v0 done, promizing! v2: avg FWHM=12.4, 12.2, 18.2 and number of valid KIDS = 869, 758 and 454 for A1, A3 and A2

done

20180118s205

Uranus

18:00

62 deg

tau225=0.35, Huge beams right after the beammap: focus drift

HA

v0 done, wavy kid positions. Bof...

20180119s73

Jupiter

06:55

36 deg

tau225=0.4

20180119s74

Mars

07:20

34 deg

tau225=0.4

LP

abnormal refraction

20180121s92

Mars

07:05

33 deg

tau225=0.2

LP

v0 done, abnormal refraction : not usable

20180122s82

Mars

07:34

34 deg

tau225=0.15

LP

v2: avg FWHM = 12.4, 12.2, 18.2 and nb of valid KIDS = 864, 736, 439 for A1, A3 and A2

done

20180122s309

3C84

23:20

41 deg

tau225=0.16

HA

V0 done, usable. V2 done, FWHM 12”, 18” OK. usable. Recalibration using 3C84 flux TBD

done

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

UT

comment

20180115

110

0.16

14:58

20180115

126

0.14

17:40

20180116

69

0.33

17:30

20180117

20

0.22

00:51

20180117

195

0.12

15:38

20180118

31

0.16

02:49

20180118

197

0.34

17:06

20180119

8

0.36

01:24

20180119

71

0.41

06:32

20180119

129

0.31

12:22

20180119

228

0.23

17:32

20180120

58

0.17

05:17

20180120

188

0.25

18:34

20180121

93

0.21

07:28

20180122

135

0.16

12:10

20180122

212

0.15

16:07

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 OTF 8x5 scans of primary calibrators

Dates

scan #

source

elevation

comment

20180116

102-105

Uranus

45-44

otf 8x5

20180117

282 + 284-287

Uranus

30-26

otf 8x5

Table of OTF 8x5 scans of secondary calibrators

Dates

scan #

source

elevation

comment

20180116

82-85

MWC349

29-26

otf 8x5

20180118

65-68

MWC349

otf 8x5

20180119

187-191 + 193-196

MWC349

otf 8x5

20180120

169-172

MWC349

otf 8x5

20180121

113-116 + 117-120

MWC349

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, scan 300: RTA crashed with error "end of file encountered in the imbfits file"

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

Dates

scan #

UT

elevation

comment

20180119

108-111

10:10

20 deg

otf 8x5

20180121

149-152

12:30

50 deg

otf 8x5

20180119

182-186

15:21

70 deg

otf 8x5

20180120

184-186

18:30

45 deg

otf 8x5

20180120

208-211

20:20

20 deg

otf 8x5

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