The UVES-MOS calibration scheme requires to carefully respect interdependencies of raw and product calibration files. The calibration products have to be processed step by step. Hence this scheme is called a calibration cascade.
The bias and format check frames can be processed in an 'elementary' way, without other calibration products involved. The order definition flat requires the DRS set-up table which is a product of the previous format check recipe. The slit flat field recipe requires three previously obtained products: a master bias, a DRS set-up table (usually produced from an order definition flat), and a guess order table. For processing the fibre flat fields, a master bias, a (processed) order definition frame, a guess order table, and up to three master slit flat fields are necessary. Finally, the wave recipe needs a guess line table, a DRS set-up table, and an order definition table.
Reduction of science frames is done when all calibration products are available. The recipe requires a master bias, an order definition table, a line table, and the complete set of slit and fibre flat field products.
In quick-look mode on Paranal, the UVES-MOS pipeline has a fixed set of static calibration products. Hence the dependencies described here are not properly respected. Calibration solutions processed by QC Garching do respect the cascade. Together with quality checking, this results in the optimum possible products.
By clicking on areas on the map you can obtain detailed information about the calibration step. A complete description is also available.
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Further links: raw calibration files, calibration products, and naming scheme.
Intermediate products are used downstream in the calibration cascade, but not for science reduction. Raw frames and calibration products from previous calibration steps are combined in a Reduction Block which builds a calibration job within the pipeline.
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