#
# Photometric redshifts of the CFHTLS WIDE T0006
# Version 1.0, May 2010
# 
#
# 4 fields selected at I/Y < 24
#
# Arnouts S., Coupon J., Ilbert O., Mc Cracken H., Mellier Y. 
# and the Terapix/CFHTLS/VVDS/VIPERS teams
#
# Please read the documentation cfhtls_wide_T006_v1.0_May2010.pdf



#############################################
###         HEADER 
#############################################


##########################
# Object identification
# from the Terapix T006 CFHTLS-Wide catalogues
#
#  1    Id             Original Id in the individual catalogues (one catalogue per tile)
#  2    pointing       Id of the tile
#  3    inout          keep 1 if you want a merged catalogue without duplicated sources;
#                      0 means that this source is duplicated and has already an entry in the merged catalogue
#  4    newId          unique positive Id for the galaxies with inout=1
#                      Negative Id for the source having already an entry in the catalogue 
#  5    alpha          J2000, in deg
#  6    delta          J2000, in deg
#  7    flag           photometric flag from Terapix. 
#                             flag=0 clean
#                             flag=1 if star according to sextractor (only at i/y<21)
#                             flag>1 if the source falls in a masked region.
#  8    r2 limit       limit in r2 to be considered for star selection (this value changes for each tile)
#  9    r2             half light radius


##########################
#  Final photo-z
#  
# 10    final photo-z  z= zPDF    if galaxy  (median of the maximum likelihood distribution, column 11)
#                      z= 0       if star
#                      z= 9.99    if strange object (possible bright QSO, less than 3 filters for the fit, or strange chi2)
#                      z= -99.9   if masked area
#                      z= -999.9  if inout=0 (duplicated object)


##########################
#  Best fit obtained with the galaxy templates
#
#  warning: every source has a redshift, regardless of the type or if it is in a masked area or not
#

# 11    zPDF           photo-z measured using the galaxy templates. Median of the maximum likelihood distribution.
# 12    zPDF_l68       lower limit, 68% confidence level
# 13    zPDF_u68       upper limit, 68% confidence level
# 14    chi2_zPDF      reduced chi2 (-99 if less than 3 filters) at zPDF (doesn't include the N(z) prior in the chi2)
# 15    mod            best fit template at zPDF
# 16    ebv            best-fit additional extinction  E(B-V) at zPDF
# 17    NbFilt         Number of filters used in the fit


# 18    zMin           photo-z measured using the galaxy templates. Photo-z defined as the minimum of the chi2 distribution.
# 19    zl68           lower limit, 68% confidence level for zMin
# 20    zu68           upper limit, 68% confidence level for zMin
# 21    chi2_best      reduced chi2 (-99 if less than 3 filters) for zMin (N(z) prior is included in the chi2)

# 22    zp_2           second photo-z solution if a second peak is detected with P>5% in the PDF
# 23    chi2_2         reduced chi2 for the second photo-z solution



##########################
# Best fit obtained with the STAR templates 
#
# 24    mods           model for the star library
# 25    chis           reduced chi2


##########################
# Best fit obtained with the AGN templates
#
# !!!! Warning: this value is only informative: not tested !!!! no correction for variability applied !!!
#
# 26    zq             photoz for the AGN library.  
# 27    chiq           reduced chi2 
# 28    modq           best fit template


##########################
# Observed auto magnitudes
# CFHT/MEGACAM
# Already corrected for Milky extinction 
# The color terms advised by Terapix to match the star sequence have been applied.
#
# 29    U          u*   
# 30    G          g 
# 31    R          r 
# 32    I          old i 
# 33    Y          new i 
# 34    Z          z 


##########################
# Errors on observed magnitudes
#
# 35    eU 
# 36    eG 
# 37    eR 
# 38    eI 
# 39    eY 
# 40    eZ