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AMBER pipeline:
general information

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general AMBER

PIPELINES AT ESO

This page provides information about pipeline processing and data types.

Raw data are selected, associated and inserted into a reduction mechanism which produces calibration products, science products and quality control information. This mechanism is the data processing pipeline. There is one such pipeline for each VLT and VLTI instrument.

Find general information about ESO reduction pipelines here.

FUNCTIONALITIES

The main functionalities of the pipelines are:

  • create master calibration data,
  • reduce science frames,
  • extract QC information from the data.

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.

Before October 2011 QC Garching processed science data, using the best available, quality-checked master calibration data. As of October 2011 this service is not offered anymore.

OPERATIONS

There are two instances of the data reduction pipelines:

  • at the instrument workstation on Paranal, running in automatic mode,
  • at HQ Garching, run by the Quality Control Group in the optimized mode.

The automatic mode is used for quick look purposes 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.

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 checked.

top AMBER pipeline

The AMBER pipeline supports the different AMBER setups.

It is based on the amdlib librairies developped by JMMC. You can find more information here. The products are stored as FITS files (binary table) and followed the Optical/Interferometry (OI Fits) convention. More information on this standard can be found here

Until October 2011 all science data were processed by QC Garching. This has been stopped now, and only calibration data are pipeline-processed by QC Garching.

The AMBER pipeline is publicly available (check out here). Under this link you also find the pipeline Users Manual.

 

top Raw files association and processing

AMBER raw files are classified and associated following the calibration map which is available here.

top STANDARD SETTINGS AND PIPELINE SUPPORT

Both in Service Mode and Visitor Mode, AMBER observations are supported in all of the settings:

Since October 2011 QC Garching processes only calibration data from AMBER. Before that date, all calibration and science were processed.

top FILE FORMAT

Raw data.AMBER raw data are FITs binary tables with various extensions which described the VLTI, the instrument and the fringe data . There are common tables for all the VLTI instruments.

Products. Pipeline products are following the OIFITs standard. Details are described here.

 


 
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