|
Size: 3919
Comment:
|
Size: 3042
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 3: | Line 3: |
| <<TableOfContents(3)>> == 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. |
| Line 41: | Line 15: |
| 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). |
| Line 52: | Line 26: |
| || '''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'' || || 20171030s268 || Uranus || 11:15 p.m. || 60 deg || finished 30 min. before a crash of the main pump || LP || A1 has 12.5 arcsec average fwhm || done || |
| Line 66: | Line 41: |
| ''Table for gain curve task (3C84, i.e. 0316+413 in nikas-17)'' | ''Table of the Skydip scans'' |
| Line 72: | Line 47: |
| == 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 secondary calibrator scans'' || Dates || scan # || source || elevation || comment || || 20180112 || || || || |
|
| Line 74: | Line 64: |
| ''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 ''Table for gain curve task (3C84, i.e. 0316+413 in nikaw-17)'' |
Back to the NIKA2 2nd Science pool
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.
|
observing condition |
analysis status |
|||||
scan ID |
source |
UT |
elevation |
comments |
analyser ID |
data quality |
status |
20171030s268 |
Uranus |
11:15 p.m. |
60 deg |
finished 30 min. before a crash of the main pump |
LP |
A1 has 12.5 arcsec average fwhm |
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 |
comment |
20180112 |
|
|
|
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
Dates |
scan # |
source |
elevation |
comment |
20180112 |
|
|
|
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 |
|
|
|
otf 8x4 |