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### B.1.5 KCorrections

Functions for calculating K-corrections.

kCorr( filter, redshift, colorType, colorValue )
  Calculates K-corrections. This allows you to determine K-corrections for a galaxy, given its redshift and a colour. Filters for GALEX, SDSS, UKIDSS, Johnson, Cousins and 2MASS are covered.

  To define the calculation you must choose both a filter, specified as a `KCF_*` constant, and a colour (filter pair) specified as a `KCC_*` constant. For each available filter, only certain colours are available, as described in the documentation of the relevant `KCF_*` constant.

  The algorithm used is described at http://kcor.sai.msu.ru/. This is based on the paper "Analytical Approximations of K-corrections in Optical and Near-Infrared Bands" by I.Chilingarian, A.-L.Melchior and I.Zolotukhin (2010MNRAS.405.1409C), but extended to include GALEX UV bands and with redshift coverage up to 0.5 as described in "Universal UV-optical Colour-Colour-Magnitude Relation of Galaxies" by I.Chilingarian and I.Zolotukhin (2012MNRAS.419.1727C).

KCF_FUV
  GALEX FUV filter (AB). Use with KCC_FUVNUV or KCC_FUVu.
KCF_NUV
  GALEX NUV filter (AB). Use with KCC_NUVg or KCC_NUVr.
KCF_u
  SDSS u filter (AB). Use with KCC_ur, KCC_ui or KCC_uz.
KCF_g
  SDSS g filter (AB). Use with KCC_gr, KCC_gi or KCC_gz.
KCF_r
  SDSS r filter (AB). Use with KCC_gr or KCC_ur.
KCF_i
  SDSS i filter (AB). Use with KCC_gi or KCC_ui.
KCF_z
  SDSS z filter (AB). Use with KCC_rz, KCC_gz or KCC_uz.
KCF_Y
  UKIDSS Y filter (AB). Use with KCC_YH or KCC_YK.
KCF_J
  UKIDSS J filter (AB). Use with KCC_JK or KCC_JH.
KCF_H
  UKIDSS H filter (AB). Use with KCC_HK or KCC_JH.
KCF_K
  UKIDSS K filter (AB). Use with KCC_JK or KCC_HK.
KCF_U
  Johnson U filter (Vega). Use with KCC_URc.
KCF_B
  Johnson B filter (Vega). Use with KCC_BRc or KCC_BIc.
KCF_V
  Johnson V filter (Vega). Use with KCC_VIc or KCC_VRc.
KCF_Rc
  Cousins Rc filter (Vega). Use with KCC_BRc or KCC_VRc.
KCF_Ic
  Cousins Ic filter (Vega). Use with KCC_VIc.
KCF_J2
  2MASS J filter (Vega). Use with KCC_J2Ks2 or KCC_J2H2.
KCF_H2
  2MASS H filter (Vega). Use with KCC_H2Ks2 or KCC_J2H2.
KCF_Ks2
  2MASS Ks filter (Vega). Use with KCC_J2Ks2 or KCC_H2Ks2.
KCC_BIc
  Johnson B - Cousins Ic colour.
KCC_BRc
  Johnson B - Cousins Rc colour.
KCC_FUVNUV
  GALEX FUV - NUV colour.
KCC_FUVu
  GALEX FUV - SDSS u colour.
KCC_gi
  SDSS g - i colour.
KCC_gr
  SDSS g - r colour.
KCC_gz
  SDSS g - z colour.
KCC_H2Ks2
  2MASS H - Ks colour.
KCC_HK
  UKIDSS H - K colour.
KCC_J2H2
  2MASS J - H colour.
KCC_J2Ks2
  2MASS J - Ks colour.
KCC_JH
  UKIDSS J - H colour.
KCC_JK
  UKIDSS J - K colour.
KCC_NUVg
  GALEX NUV - SDSS g colour.
KCC_NUVr
  GALEX NUV - SDSS r colour.
KCC_rz
  SDSS r - SDSS z colour.
KCC_ui
  SDSS u - SDSS i colour.
KCC_URc
  Johnson U - Cousins Rc colour.
KCC_ur
  SDSS u - r colour.
KCC_uz
  SDSS u - z colour.
KCC_VIc
  Johnson V - Cousins Ic colour.
KCC_VRc
  Johnson V - Cousins Rc colour.
KCC_YH
  UKIDSS Y - H colour.
KCC_YK
  UKIDSS Y - K colour.

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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page: http://www.starlink.ac.uk/topcat/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@bristol.ac.uk