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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
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