K-selected catalogs for the deep NIR MUSYC fields, with
UBVRIzJHKch1234 photometry

Danilo Marchesini
May 20, 2008
v4.3

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All fluxes normalized to an AB zeropoint of 25.
  mag_johnson = -2.5log(flux) + 25 - ABconv

AB converions for 1255,   HDFS2,   1030,   HDFS1
  U	          0.56    0.56     0.81    0.56
  B	         -0.08   -0.08    -0.08   -0.08
  V	          0.02    0.02     0.02    0.02
  R	          0.23    0.23     0.23    0.23
  I	          0.45    0.46     0.45    0.46
  z	          0.54    0.54     0.54    0.54
  J	          0.94    0.94     0.93    0.93
  H	          1.40    1.40     1.38    1.38
  K	          1.88    1.88     1.86    1.86

ch1		  2.78    2.78     2.78    2.78
ch2		  3.26    3.26     3.26    3.26
ch3		  3.75    3.75     3.75    3.75
ch4		  4.38    4.38     4.38    4.38

pixelscale = 0.267"/pix

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**Suggested** minimum weights ([band]w) for the IRAC photometry
  (corresponding to at least 4 individual frames used in the data
  reduction and final image combination):

	      1255    1030    HDFS2   HDFS1
ch1	      >0.3    >0.3    >0.5    >0.7
ch2	      >0.3    >0.3    >0.5    >0.6
ch3	      >0.3    >0.3    >0.5    >0.7
ch4	      >0.3    >0.3    >0.5    >0.6

Also, note that the IRAC zero-points are uncertain at the 2% level,
not included in the error budget.

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**field**_v4.3.cat

Format for the main catalogs:
id                  Object id
x                   x barycenter
y                   y barycenter
ra                  J2000 decimal degrees
dec                 J2000 decimal degrees
field               Internal field code: 4=HDFS1, 5=HDFS2, 6=1030, 7=1255
[band]_colf,_colfe  Flux, error in color aperture
K_totf              K-band aperture-corrected AUTO flux
K_totfe             K-band aperture-corrected AUTO error
[band]w             Exptime, normalized to median of all objects (currently =1 for optical bands)
ap_col              Color aperture diameter (arcsec)
ap_tot              AUTO aperture diameter (arcsec)
f_deblend1          Object was originally blended with another (SExtractor's "blend")
f_deblend2          Object's neighbors may significantly bias AUTO photometry (SExtractor's "bias")
Kr50                Halflight radius (arcsec)
Keps                Ellipticity
Kposang             Position angle (SExtractor's THETA_J2000)

totcor              Aperture correction (AUTO flux,error -> total flux,error) 
Kstarclass          SExtractor star/galaxy classifier
UH_maxflags         Maximum SExtractor flag for bands U though H
K_flags             SExtractor flag for K

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**field**_v4.3_zphot.cat

Format for "hyperz-input" catalogs:
id                  Object id
[band]_colm         AB magnitude in color aperture
[band]_colme        Magnitude uncertainty in color aperture (=2.5/2.3*[band]_colfe/[band]_colf)

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**field**_v4.3.sav

IDL ".sav" files contain all of the variables listed in the main
catalog, plus the magnitudes and uncertainties given in the
hyperz-input catalog.  They were created using IDL v6.3; it is
possible that older versions of IDL will open these files incorrectly.
Use the 'restore' command to read these files within IDL.

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