PIPELINES AT ESO
Pipelines are used at ESO to process both calibration data and science data
and to retrieve quality information.
There is a dedicated
pipeline for each VLT and VLTI instrument.
Find general information about ESO reduction pipelines here.
The main functionalities of the pipelines are:
QC Garching creates master calibration data from all raw calibration data. The
raw data are stored in the ESO Archive and are public. They are
quality-checked and used for data reduction and for trending.
- create master calibration data,
- reduce science frames,
- extract QC information from the data.
For selected instrument modes, we offer science-grade data products processed
with the pipelines.
There are two instances of the data reduction pipelines:
The automatic mode is used for quick look and for on-site quality
control. It processes all raw data sequentially, as they arrive from the
instrument. If calibration products ("master calibrations") are required for
processing science data, these are taken from a database with standard,
pre-manufactured calibration products. The automatic mode is not tuned to
obtain the best possible results.
- at the instrument workstation on Paranal, running in automatic mode,
- at HQ Garching, run by the Quality Control Group in the optimized mode.
The optimized mode is the mode, which uses all data of a night, including the
daytime calibrations. The calibration data are sorted and grouped according to
their dependencies. Master calibration data are created. Their quality is
The OmegaCAM data processing pipeline is operational since June
2011 (during OmegaCAM commissioning). It is not publicly
CALIBRATION and SCIENCE data
All of OmegaCAM calibrations are acquired and reduced according the
OmegaCAM calibration plan. The calibration cascade is given
OmegaCAM's only observing mode is imaging.
The pipeline supports all types of calibrations of the calibration
plan. There is also a science recipe which reduces science images to
the coadded (stacked) level.
The OmegaCAM detector mosaic is equipped with 32 e2v blue-sensitve
2048 x 4200 pixel detectors. OmegaCAM raw frames come as fits frames
with one primary header and 32 extensions (i.e. MEF), each of which
consists of a header containing detector specific information and
Pipeline products have can have two formats:
- Fits frames with one primary header and 16 extensions each one consisting of an extension header and pixel data.
- Fits files with one primary header and 16 extensions each one consisting of an extension header and a binary table (e.g. zeropoints and photometric fits tables)