mirror sites: PL (internal link) HQ     [?]

Quality Control and
Data Processing


CAL | HC | refs | QC
QUALITY CONTROL
    HOME
PIONIER QC
Trending & QC1
Pipeline
calib data
PIONIER ...
QC links:
Calibration data
| Raw Data | Calibration Cascade | Static Calibrations

The QC group processes a stream of science-grade data products for selected VLT instruments. They are created using certified pipelines and certified master calibrations. Find an overview of the current streams here.

The PIONIER pipeline which is used by Quality Control is not available to the community.
It is used to assess the quality of the observations, and to monitor the health of the PIONIER instrument on short and longer time scales.


Raw Data
| Raw Data | Calibration Cascade | Static Calibrations

Calibration Raw Data

The following table contains an overview of the raw calibration files for PIONIER. The data types are identified with the DPR TYPE keyword of the fits headers.
frame DPR TYPE DPR TECH Purpose number taken at night details
DETMON PTC,BIAS,DETCHAR IMAGE detector monitoring (gain, bad pixels map) 50 [ BADPIX  example frame ]
DARK DARK IMAGE dark current 3
SPECTRAL_CALIBRATION (OBJECT) WAVE,OBJECT INTERFEROMETRY effective WL of each spectroscopic channel 1 [ spectral calibration example frame ]
SPECTRAL_CALIBRATION (LAMP) WAVE,LAMP INTERFEROMETRY effective WL of each spectroscopic channel 1 [ spectral calibration example frame ]
KAPPA_MATRIX (OBJECT) KAPPA,OBJECT INTERFEROMETRY interferometric transmission 4 [ kappa matrix example frame ]
KAPPA_MATRIX (LAMP) KAPPA,LAMP INTERFEROMETRY interferometric transmission 4 [ kappa matrix example frame ]
FRINGE CALIBRATOR FRINGE,OBJECT INTERFEROMETRY fringes on a calibrator 1 [ Calibrator example frame ]

The DETMON is used only to monitor the detector (Gain and bad pixels). The full detector is lluminated.
SPECTRAL_CALIBRATION, DARK and KAPPA_MATRIX are taken at night on the object (for spectral calibration and kappa matrix) for calibration of the science or astronomical calibrator data. They are also taken during the day on an internal source to monitor the stability and the Health of the instrument.
An astronomical calibrator is obesverd also at night following a sequence : CAL1-SCI-CAL2. Most of the astronomical calibrators have known diameters and magnitude which are listed in the calibrator catalog (see here for more information on the catalog).


Calibration Cascade
| Raw Data | Calibration Cascade | Static Calibrations

Calibration cascade

The processing of PIONIER calibration frames requires a cascaded scheme where the mutual dependencies of products and raw frames are respected. The proper sequence of all these production steps is called the calibration cascade.
The proper sequence of all these production steps is called the calibration cascade (see here ).
Within that cascade, all products are checked with respect to their quality and their relationship in time. This means e.g. that a dispersion solution is not only generated using an arbitrary quality-checked localization solution, but that specific solution is chosen which is closest in time.
All products created by QC Garching follow the calibration cascade.


Static Calibrations
| Raw Data | Calibration Cascade | Static Calibrations

Static calibrations

The following static calibration tables (the ones not being regularly processed from raw calibration data) are required for PIONIER data processing:

  • a mask to identify the science outputs, this is needed only to run the detector recipe
  • the calibrator catalog. The VLTI Calibrator Selector tool which includes this catalog is found under VLTI/CalVin

    They come as FITS tables (extension fits).
    The calibrator catalog is delivered through the calSelector archive service.


  • Send comments to <qc_pionier@eso.org> powered by QC [webCMS v1.0.1]