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SPHERE IRDIS Quality Control:
flat and lamps calibration

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QUALITY CONTROL
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SPHERE QC
Trending & QC1
   IRDIS FLAT
Pipeline
Data Management
QC links:
 
QC PLOTS
  CURRENT HISTORY
CI counts in high flux raw flat
CI rms of master flat green
CI fixed pattern noise fpn green
CI number of bad pixel nbp green
     
DBI counts in high flux raw flat DBI counts DBI_H_counts
DBI rms of master flat DBI rms DBI_H_rms
DBI fixed pattern noise DBI fpn DBI_H_fpn
DBI number of bad pixel DBI NBP DBI_H_nbp
QC1 database (advanced users): browse | plot
   Click on CURRENT to see the current trending (Health Check).
   Click on HISTORY to see the historical evolution of the trending.


The IRDIS arm is operated in four modes:

  • CI: classical imaging, the dual beam filter ( INS1.OPTI2.NAME ) is CLEAR
  • DBI: dual beam imaging, the dual beam filter ( INS1.OPTI2.NAME ) is one of D_Y23, D_J23, D_H23 or D_K12.
  • DPI: differential polarimetric imaging, the dual beam filter ( INS1.OPTI2.NAME ) is one of P0-90, P45-135
  • LSS: long slit spectroscopy is flatfielded with imaging flats with dual beam filter=CLEAR and common beam filter being one of W_YJH and W_YHJKs

IRDIS lamp flats are acquired during daytime. The template generates five raw frames with increasing countrate.

IRDIS_CLI_FLAT IRDIS CI master flat using common filter wheel B_H filter and no filter in the dual beam filter wheel
IRDIS_FLAT_RAW IRDIS DBI raw flat (last in the sequence with highest flux), using common filter wheel B_Ks filter and dual beam filter D_K12.
IRDIS_FLAT_MASTER IRDIS DBI master flat, using common filter wheel B_Ks filter and dual beam filter D_K12.

 

top counts, cosmetics, fixed pattern noise

QC parameters come per common filter, dual beam filter and per beam (left, right).

QC1 parameters

parameter QC1 database: table, name procedure
counts sphere_irdis_flat, qc_flux_left_4, qc_flux,right_4 median counts in the fifth (most bright) raw flat frame of the sequence of five raw frames with increasing exposure time
RMS of the master flat sphere_irdis_flat, qc_rms_left, qc_rms_right RMS of the master flat to monitor detector cosmetics and vignetting
fixed pattern noise sphere_irdis_flat, qc_fpn_left, qc_fpn_right fixed pattern noise
number of bad pixel sphere_irdis_flat, qc_num_badpix number of bad pixel in the whole FOV (covering both beams)

Trending

For IRDIS modes DPI and LSS only a subset of QC parameters is monitored.

 


 
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