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a photometric redshift code

Version : 1.1

Author(s) : Micol Bolzonella (micol@ifctr.mi.cnr.it), Roser Pello
(roser@ast.obs-mip.fr) and Joan-Marc Miralles (jmiralle@eso.org)

License : GPL

Website :
http://webast.ast.obs-mip.fr/hyperz/

Disk space required for installation is 18.42 Mb

The following printable documents will be installed :

### Summary

From a photometric catalogue, hyperz finds the redshift of each object
by means of a standard SED fitting procedure, i.e. comparing the

observed magnitudes with the expected ones, computed from template
Spectral Energy Distributions.

To compare the observed with the fiducial photometry, we need to
handle the template spectra applying the absorption from the Lyman
forest

(following Madau prescriptions), the reddening (with different
implemented laws) to the redshifted SEDs (either observed or
synthetic).

If required, the program compute on the real data the galactic
dereddening, performed with a Seaton law and color excess EB-V selected
from

the user.

he principal outputs include: the photometric redshift zphot,
satisfying the minimum chi2 criterion, the error bars at 3 confidence
levels, the

spectral type, age and extinction of the solution, the f(lambda) of
the best fit SED, the probability associated to the minimum chi2 for
each

redshift step, the probability of lying at a given redshift (useful
to look for galaxy cluster members), the absolute magnitude in a given
filter and

the secondary solutions.

The package also contains the program make_catalog, allowing to
build simulated catalogues, very useful to test the accuracy for a
given filter

set.

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