Documentation of QC procedures: procedure lamp_lss_qc

Documentation of QC procedures: procedure lamp_lss_qc_2CCD.prg for FORS1

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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bias_qc_2CCD.prg	dark_qc_2CCD.prg	detmon_qc.prg
flat_scr_qc_2CCD.prg	lamp_std_qc_2CCD.prg	lamp_lss_qc_2CCD.prg	lamp_mos_qc_2CCD.prg
flat_sky_qc_2CCD.prg	std_ima_qc_2CCD.prg	std_lss_qc_2CCD.prg	std_mos_qc_2CCD.prg
sci_img_qc_2CCD.prg	sci_lss_qc_2CCD.prg	sci_mos_qc_2CCD.prg

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NAME

lamp_lss_qc_2CCD.prg

VERSION

2.0 -- adapted for WAVE and FLAT for new pipeline

SYNTAX

MIDAS

CALL

measureQuality
from $DFS_PRODUCT/LAMP_LSS/$DATE:
inmidas -P -j "@@ $DFO_PROC_DIR/lamp_lss_qc_2CCD.prg $date $PF"

INSTRUMENT

FORS1

RAWTYPE

LAMP_LSS

PURPOSE

compares raw and product WAVE and FLAT files for FORS1 QC assessment; the plots are later reviewed within certifyProducts. The plots are stored as Postscript file in $DFO_PLT_DIR.

PROCINPUT

first raw flat and arc from AB;
products: resolution table, reduced arc image, delta image,
disp residuals table, wavemap image; master screen flat and normalized master flat

QC1TABLE

trending | table(s) in QC1 database:
fors1_lss_wave

TRENDPLOT

trending | HealthCheck plot(s) associated to this procedure:
trend_report_LSS_lambda_c_HC.html

QC1PAGE

trending | associated documentation:
lsswlc/lsswlc.html

QC1PLOTS
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lamp_lss_grap1.png
top left: line identifications in reduced arc frame
lower left: resolving power;
lower right: residuals for row at bottom, center and top (in Angstroem)
Sometimes the arc lines were not detected in all rows, so some of the coloured symbols may be missing.
right: non-linear terms of fit and deviations from linear fit
Sometimes the arc lines were not detected in all rows, so there may be no red crosses. Then the reduced arc lamp should be checked very carefully.
top panel: date; name of disp residuals table (red), setup parameters (filter, grism, slit, chip)
bottom panel: some QC1 parameters - wavelength range of central row, average residuals; mean resolution and FWHM, average number of lines identified

lamp_lss_grap2.png
left, top row: rows and columns of normalized master flat (full range)
left, bottom row: rows and columns of normalized master flat (central part)
right: central row (top) and column (bottom) of master screen flat;
top panel: date; name of normalized master flat field (red), setup parameters (filter, grism, slit, ship), number of frames
bottom panel: range in x over which master screen flat field has more than 10000 ADU in central row and the S/N for that range

lamp_lss_disp1.png
full display of reduced arc frame

lamp_lss_disp2.png
full display of normalized master flat

QC1PARAM

ALGORITHM

Description of algorithms:
wave_min: shortest wavelength of identified arc lines in central CCD row
wave_max: longest wavelength of identified arc lines in central CCD row
x_min: pixel position of shortest wavelength of identified arc lines in CCD central row
x_max: pixel position of longest wavelength of identified arc lines in central CCD row
n_lin: average number of identified arc lines per CCD row
disp: mean dispersion in central row

CERTIF

Reasons for rejection:
- only 1 flat field (daily HC monitoring, 300V 0.3")
- unusual shape of non-linear terms (e.g. double peak/valley;
- curved or slanted lines in the reduced arc image;
- wrong flux distribution in master screen flat (e.g. missing double peak for 300V)

COMMENTS

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[2009-07-30T07:16:57] created by qcDocu v1.1, a tqs tool