VISIR: science data

VISIR:
science data

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general

VISIR

SCIENCE DATA: GENERAL

On Paranal, the quick-look pipelines make an effort to automatically reduce all science data. The reduction is performed using standard calibration solutions from a local calibration database which is refreshed every few months. Generally any pipeline processing on the site is done on a best-effort basis. Its purpose is to offer a quick look to assess data quality etc.

Until the end of P87 (September 2011), science data were processed by QC Garching with the best possible (certified) calibrations solutions. The products were ingested into the Science Archive and delivered to the PIs. This service has been terminated with the begin of October 2011.

For some instruments, science-grade data products are created by QC Garching, using certified pipelines. Currently these are 1D spectral data products from UVES (Echelle mode), XSHOOTER (Echelle mode), and GIRAFFE (Medusa MOS modes). See the QC pages for those instruments for more information.

TYPES OF RAW SCIENCE DATA

MODE	DPR CATG	DPR TYPE	DPR TECH	template	description	comments
IMAGING	SCIENCE	OBJECT	IMAGE,CHOPNOD,JITTER IMAGE,CHOPPING,JITTER IMAGE,NODDING,JITTER IMAGE,DIRECT,JITTER	VISIR_img_obs_AutoChopNod	chopping and/or nodding observations	supported by the pipeline visir_img_chain
IMAGING	SCIENCE	OBJECT	IMAGE,CHOPNOD,RASTER IMAGE,CHOPPING,RASTER IMAGE,NODDING,RASTER	VISIR_img_obs_GenericChopNod	raster observations	no pipeline support
IMAGING	SCIENCE	OBJECT	IMAGE,PRE,CHOPNOD,JITTER IMAGE,PRE,CHOPNOD,RASTER	VISIR_img_obs_AutoChopNod	preimaging observations	supported by the pipeline visir_img_chain
IMAGING	SCIENCE	OBJECT	IMAGE,BURST,CHOPNOD,JITTER	VISIR_img_obs_BurstAutoChopNod	burst observations	no pipeline support (not offered in P95)
SPECTROSCOPY	SCIENCE	OBJECT	SPECTRUM,CHOPNOD SPECTRUM,NODDING	VISIR_spec_obs_LRAutoChopNod VISIR_spec_obs_HRAutoChopNod	LR and HR slit spectral observations	supported by the pipeline visir_spc_chain
SPECTROSCOPY	SCIENCE	OBJECT	ECHELLE	VISIR_spec_obs_HRXAutoChopNod	HR echelle spectral observations	supported by the pipeline visir_spc_chain

SCIENCE PRODUCTS (pre-upgrade)

As reference, the science products that have been created with the pre-upgrade pipeline and that have been distributed in Service Mode packages until September 2011 are described here.

MODE	pipeline recipe	description
IMAGING	visir_img_combine	combined images, corrected for detector stripping, no image reconstruction
SPECTROSCOPY LR, HR-slit	visir_spec_phot	reduced LR (and HR slit) spectroscopy, corrected for detector stripping
SPECTROSCOPY HR-echelle	visir_spec_obs_ech	reduced HR-echelle spectroscopy, corrected for detector stripping

Naming scheme

After production and certification, the calibration products are renamed with a more user-friendly scheme which includes type, creation date and relevant setting parameters.

Description of naming scheme