Classifying Objects by Medium-Band Observations
- a spectrophotometric 17-filter survey -

The COMBO-17 multi-color classification:


The CADIS survey showed that classification and redshift estimation in surveys with medium-band filter sets are a powerful and accurate tool for studies on the evolution of galaxies and quasars over most of the time the universe existed. The survey strategy is capable of replacing time-consuming spectroscopy as the main tool for classification and redshift measurements (see paper by Wolf, Meisenheimer & Röser, on the method A&A 2001, 365, 660 and paper on the public CDFS catalogue A&A 2004, 421, 913).

Within CADIS we developed a MIDAS tool for classification and redshift estimation. The following MIDAS commands are available in the context CADIS:


Starting out:
Environment variables
MIDAS context classy

Making & testing libraries:
Several commands...Calculation of a new spectral galaxy library starting with the PEGASE code
@@ MC_LIBRARYCalculation of a new colour library
@@ prepare_MC_COMBOCreation of a simulated object catalogue
MCCLASS/CLASSIFYClassification of an object table

Making & testing flux tables:
MCCLASS/COLORSCalculation of colours on an object table
MCCLASS/ERRORSCalculation of depth by band and flux error plots
MCCLASS/MAINSEQCalibration check of an object table
MCCLASS/CLASSIFYClassification of an object table
MCCLASS/PLOTPlot an individual object SED with template from a catalogue
Restframe quantitiesCalculate various restframe quantities for galaxies and QSOs (several prgs, link not active yet!!)

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Last update July 20, 2005, CW