QC documentation system: QC procedure gravi_std.py for GRAVITY

This documentation is intended both for QC scientists and SciOps astronomers (who may want to ignore the technical information displayed in grey).
 
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gravi_dark.py gravi_p2vm.py gravi_std.py
 
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NAME gravi_std.py
VERSION 1.0 -- October 2016
1.0.1 -- changes for gravity-0.9.8 (2016-10-28)
SYNTAX PYTHON
CALL processQC
from $DFS_PRODUCT/STD_SINGLE/$DATE
or from $DFS_PRODUCT/STD_DUAL/$DATE
/home/vimos/python/vimos_std.py -i -a $AB
INSTRUMENT GRAVITY
RAWTYPE STD_SINGLE
PURPOSE QC check on raw and product frames from calibrators
PROCINPUT raw calibrator observations and visibility product
QC1TABLE trending | table(s) in QC1 database:
gravity_vis
TRENDPLOT trending | HealthCheck plot(s) associated to this procedure:
trend_report_VISAMP_AT_MED_SPLIT_HC.html | trend_report_T3PHI_AT_MED_SPLIT_HC.html | trend_report_CAL_PHASEDIFF_MED_HC.html
QC1PAGE trending | associated documentation:
std_qc1.html
QC1PLOTS
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std1.png
overview of raw frames, usually a sequence of object and sky exposures, e.g. object-sky-object
std2.png
left panels: squared visibilities over wavelength from the SC detector for the six baselines
right panels: same for the FT
std3.png
left panels: flux from each telescope over wavelength from the SC detector
right panels: same for the FT
QC1PARAM QC1 parameters written in QC1 database:
QC1 DB names: tf_vis2_ft12_p1/p2, etc. | tf_vis2_sc12_p1/p2, etc. | tf_visamp_ft12_p1, etc. | tf_visamp_sc12_p1, etc. |
t3_phi_ft123_p1, etc. | t3_phi_sc123_p1, etc. | phasediff_ft12, etc. | phasediff_sc12, etc. |
fluxrate_ft1_p1/p2, etc. | fluxrate_sc1_p1/p2, etc. | trans_ft1/2/3/4 | trans_sc1/2/3/4
All parameters are calculated by the pipeline recipe.
ALGORITHM Description of algorithms:
tf_vis2: median transfer function squared visibilities for FT and SC, respectively, and for the six baselines, 12, 13, 14, 23, 24, and 34, and for the two polarimetric beams
tf_visamp: averaged transfer function visibility amplitudes for FT and SC, respectively, for the six baselines, 12, 13, 14, 23, 24, and 34; only for P1 polarimetric beam
t3_phi: closure phase, i.e. sum of the phases of three baselines inside a triangle; for the four telescope triangles 123, 124, 134, and 234, and for FT and SC, averaged over wavelength; only for P1 beam
phasediff: average phase difference of the two polarimetric beams, only in case of split polarimetry
fluxrate: flux in e/s from per telescope, separate for FT and SC and for the polarimetric beams
trans: transmission from target to detector (e/photon), per telescope and for FT and SC
CERTIF Reasons for rejection:
unusual low visibility or visibility >> 1, no flux from one or more telescopes
COMMENTS Same script for both raw types STD_SINGLE and STD_DUAL.
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