[ ESO ]
ISAAC pipeline:
science data

CAL | HC | refs | QC
QUALITY CONTROL
    HOME
ISAAC QC
Trending & QC1
Pipeline
science data
Data Packages
Data Management
QC links:
general ISAAC

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 have been 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. The documentation of science pipelines and science processing is kept here for its heritage value.

TYPES OF RAW SCIENCE DATA

ISAAC science raw data come in the following types:

frame DPR TYPE Description
typical number taken per OB and setting
SW-arm Imaging OBJECT or SKY The raw frames come as a stack of jittered OBJECT frames. SKY frames are optional
5-40
SW-arm Spectroscopy OBJECT The raw frames come as a stack of nodded and optionally jittered OBJECT frames.
2-10
SW-arm Polarimetry OBJECT as SW-arm imaging
LW-arm imaging OBJECT or SKY Jitter-mode: as LW-arm imaging

5-40

OBJECT Chopping mode: The raw frames come as a stack of OBJECT frames. The frames are data cubes; composed of two frames; each frame corresponds to a chopping position.
LW-arm Spectroscopy OBJECT Jitter mode: as SW-arm spectroscopy
2-10
Chopping mode: The raw frames come as a stack of OBJECT frames. The frames are data cubes; composed of two frames; each frame corresponds to a chopping position.
LW-arm FastJitter OBJECT The raw frames are data cubes. The first two dimensions correspond to the detector window and the third dimension coresponds to the time. Several data cubes result form the repeated execution of the one science OB.
1-3
LW-arm Burst OBJECT The raw frames are data cubes. The first two dimensions correspond to the detector window and the third dimension corresponds to time. Several data cubes result form the repeated execution of the one science OB.
1-3

SCIENCE PRODUCTS

Overview of science recipe and QC plots


There is one pipeline recipe for science imaging modes isaac_img_jitter and one recipe for all science spectroscopy modes isaac_spc_jitter. The isaac_spc_jitter serves also calibrations spectra like those of telluric standard stars and flux calibration stars, meaning science and calibration star spectra follow essentially the same data reduction scheme.

raw frame(s) product description
PRO CATG keys of product FITS header

SW-imaging

[bias_th.gif 3K] Three products are generated:
The coadded image stack,
a sky background table and a
table of the found sources.

COADDED_IMG
SKY_TAB
STARS_TAB

SW-spectroscopy [fmt_th1.gif, 2K] The co-added spectrum image and
the extracted spectrum table

OBS_COMBINED
OBS_EXTRACTED

SW-Polarimetry   not supported by the pipeline  
LW-imaging

The coadded image and the source table

COADDED_IMG
STARS_TAB

LW-spectroscopy

The co-added spectrum image and
the extracted spectrum table

OBS_COMBINED
OBS_EXTRACTED

LW-FastJitter   not supported by the pipeline  
LW-Burst   not supported by the pipeline  

 
[ESO][Index][Search][Help][News]