| 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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| bottom plots | contact | ||||||||||||||||||||||||||||
| NAME | flat_sky_qc.prg | |||||||||||||||||||||||||||
| VERSION |
1.0 -- basic functions 2.0 -- qc_report: histogram; extension to reference files 2.1 -- trend analysis 2.2 -- replaces ratio=raw1/master by diff=raw1-raw2; fp noise determined by deriv10 now. 3.0 -- AUTO mode 3.1 -- gaussian fits to noise added 3.2 -- 4port structure evaluated 3.3 -- output to table for all 4port skyflats! 3.4 -- Low/High gain discrimination added (fpatat, 04/12/99) Reference mode now set to fg15 3.5 -- reference column: upper frame reference; lower: closeup of pre-/overscan regions 3.6 -- start FORS2 adaptation (fpatat 15/03/2000) 3.7 -- automatic finding of reference frame (fpatat 08/05/2000) 3.8 -- bug fixed when no filter is present (07/09/2001) 3.9 -- changed to work with the new FORS2 CCD layout (R.Mignani) 4.0 -- since noise data are not stored in QC1 DB, they are also omitted from plot (SM, 2006-08-03) 5.0 -- adapted to new pipeline; noise calculations removed (SM, 2008-03-29) | |||||||||||||||||||||||||||
| SYNTAX | MIDAS | |||||||||||||||||||||||||||
| CALL |
measureQuality from $DFS_PRODUCT/FLAT_SKY/$DATE: inmidas -P -j "@@ $DFO_PROC_DIR/flat_sky_qc.prg $date $PF" | |||||||||||||||||||||||||||
| INSTRUMENT | FORS2 | |||||||||||||||||||||||||||
| RAWTYPE | FLAT_SKY | |||||||||||||||||||||||||||
| PURPOSE | compares raw and product FLAT_SKY files for FORS2 QC assessment; the plots are later reviewed within certifyProducts. The first plot (skyflat_grap1.png) is stored as Postscript file in $DFO_PLT_DIR. | |||||||||||||||||||||||||||
| PROCINPUT |
first raw flat from AB; MASTER_FLAT_SKY product; | |||||||||||||||||||||||||||
| QC1TABLE |
trending | table(s) in QC1 database: fors2_skyflat | |||||||||||||||||||||||||||
| TRENDPLOT | trending | HealthCheck plot associated to this procedure: none | |||||||||||||||||||||||||||
| QC1PAGE | trending | associated documentation: none | |||||||||||||||||||||||||||
| QC1PLOTS top |
skyflat_grap1.png left: comparison master (red) <-> raw (black) <-> reference (green); upper panel: middle row and middle column, full pixel range, in ADU; lower panel: middle row and middle column, central 100 pixels, in ADU top right: ratio master/reference left panel: central row, full pixel range right panel: central column, full pixel range bottom right: histogram: all pixel values of master skyflat in log frequency histogram skyflat_disp1.png full display of master frame skyflat_disp2.png full display of 1st raw frame skyflat_disp3.png full display of ratio master/reference (available only for Bessell/Special filters UBVRI and for no filter). The ratio image sometimes shows the bright streak in the upper right corner - this is not a cause for rejection. | |||||||||||||||||||||||||||
| QC1PARAM |
QC1 parameters written into QC1 table: QC1db names: datancom | median_master | sigma_master FITS key names: DATANCOM | (flat_sky_qc.prg) | (flat_sky_qc.prg) QC1db names: median_raw | sigma_raw FITS key names: (flat_sky_qc.prg) | (flat_sky_qc.prg) QC1 params created by pipeline: datancom QC1 params created by this procedure: all except datancom; | |||||||||||||||||||||||||||
| ALGORITHM |
Description of algorithms: median_master: mean level of master skyflat within X200...1800, Y400...800 (MIDAS stat/ima; outputr(8)) sigma_master: std.dev. of master skyflat within X200...1800, Y400...800 (MIDAS stat/ima; outputr(4)) median_raw: mean level of first raw skyflat within X200...1800, Y400...800 (MIDAS stat/ima; outputr(8)) sigma_raw: std.dev. of first raw skyflat within X200...1800, Y400...800 (MIDAS stat/ima; outputr(4)) | |||||||||||||||||||||||||||
| CERTIF |
Reasons for rejection: - remaining stars in master flat; Smooth, large scale variations in the ratio master/reference are no reason for rejection. Also note that the intensity of the brick-like variation decrases strongly from U to I. Some remaining structure in the master/reference ratio is usual for the U band. Also the bright streak in the upper right corner of the ratio image is often seen and no cause for rejection. | |||||||||||||||||||||||||||
| COMMENTS | ||||||||||||||||||||||||||||
| top | [2015-11-05T15:15:52] created by qcDocu v1.1.2, a tqs tool | |||||||||||||||||||||||||||
