Get the code

IDL   download calc_kcor.pro
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;    The K-corrections calculator in IDL. See http://kcor.sai.msu.ru for the 
;    reference. Available filter-colour combinations must be present in the
;    keys of the 'coeff' structure.
;
;    INPUT
;         filter_name  - name of the bandpass (string).
;                        At present, SDSS (ugriz), UKIRT WFCAM (YJHK), 
;                        Johnson-Cousins (UBVRcIc), and 2MASS (J2H2Ks2) 
;                        are supported
;         redshift     - redfshift of a galaxy (floating point)
;         colour_name  - colour identification (string)
;         colour_value - value of colour in magnitudes (floating point)
;                        should be in the AB mags for ugrizYJHK 
;                        and in Vega mags for Johnson-Cousins/2MASS colours
;
;    RETURN VALUE:  K-correction in the specified filter for given redshift  
;                        and colour values (floating point)
;
;    EXAMPLES OF USAGE:
;    IDL> print,calc_kcor('g',0.15,'g - r',1.1)
;         0.481612
;    IDL> print,calc_kcor('B',0.2,'B - Rc',1.4)
;         0.618700
;    
;    AUTHORS: I. Chilingarian, A.-L. Melchior and I. Zolotukhin (c)2010,2012
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

function calc_kcor_2012, filter_name, redshift, colour_name, colour_value

    coeff = {$
            B_BRc: [$
                [0,0,0,0],$
                [-1.99412,3.45377,0.818214,-0.630543],$
                [15.9592,-3.99873,6.44175,0.828667],$
                [-101.876,-44.4243,-12.6224,0],$
                [299.29,86.789,0,0],$
                [-304.526,0,0,0]$
            ],$
            B_BIc: [$
                [0,0,0,0],$
                [2.11655  ,  -5.28948  ,  4.5095  ,  -0.8891],$
                [24.0499  ,  -4.76477  ,  -1.55617  ,  1.85361],$
                [-121.96  ,  7.73146  ,  -17.1605  ,  0],$
                [236.222  ,  76.5863  ,  0  ,  0],$
                [-281.824  ,  0  ,  0  ,  0]$
            ],$
            H2_H2Ks2: [$
                [0,0,0,0],$
                [-1.88351,1.19742,10.0062,-18.0133],$
                [11.1068,20.6816,-16.6483,139.907],$
                [-79.1256,-406.065,-48.6619,-430.432],$
                [551.385,1453.82,354.176,473.859],$
                [-1728.49,-1785.33,-705.044,0],$
                [2027.48,950.465,0,0],$
                [-741.198,0,0,0]$
            ],$
            H2_J2H2: [$
                [0,0,0,0],$
                [-4.99539,5.79815,4.19097,-7.36237],$
                [70.4664,-202.698,244.798,-65.7179],$
                [-142.831,553.379,-1247.8,574.124],$
                [-414.164,1206.23,467.602,-799.626],$
                [763.857,-2270.69,1845.38,0],$
                [-563.812,-1227.82,0,0],$
                [1392.67,0,0,0]$
            ],$
            Ic_VIc: [$
                [0,0,0,0],$
                [-7.92467,17.6389,-15.2414,5.12562],$
                [15.7555,-1.99263,10.663,-10.8329],$
                [-88.0145,-42.9575,46.7401,0],$
                [266.377,-67.5785,0,0],$
                [-164.217,0,0,0]$
            ],$
            J2_J2Ks2: [$
                [0,0,0,0],$
                [-2.85079,1.7402,0.754404,-0.41967],$
                [24.1679,-34.9114,11.6095,0.691538],$
                [-32.3501,59.9733,-29.6886,0],$
                [-30.2249,43.3261,0,0],$
                [-36.8587,0,0,0]$
            ],$
            J2_J2H2: [$
                [0,0,0,0],$
                [-0.905709,-4.17058,11.5452,-7.7345],$
                [5.38206,-6.73039,-5.94359,20.5753],$
                [-5.99575,32.9624,-72.08,0],$
                [-19.9099,92.1681,0,0],$
                [-45.7148,0,0,0]$
            ],$
            Ks2_J2Ks2: [$
                [0,0,0,0],$
                [-5.08065,-0.15919,4.15442,-0.794224],$
                [62.8862,-61.9293,-2.11406,1.56637],$
                [-191.117,212.626,-15.1137,0],$
                [116.797,-151.833,0,0],$
                [41.4071,0,0,0]$
            ],$
            Ks2_H2Ks2: [$
                [0,0,0,0],$
                [-3.90879,5.05938,10.5434,-10.9614],$
                [23.6036,-97.0952,14.0686,28.994],$
                [-44.4514,266.242,-108.639,0],$
                [-15.8337,-117.61,0,0],$
                [28.3737,0,0,0]$
            ],$
            Rc_BRc: [$
                [0,0,0,0],$
                [-2.83216,4.64989,-2.86494,0.90422],$
                [4.97464,5.34587,0.408024,-2.47204],$
                [-57.3361,-30.3302,18.4741,0],$
                [224.219,-19.3575,0,0],$
                [-194.829,0,0,0]$
            ],$
            Rc_VRc: [$
                [0,0,0,0],$
                [-3.39312  ,  16.7423  ,  -29.0396  ,  25.7662 ],$
                [5.88415  ,  6.02901  ,  -5.07557  ,  -66.1624 ],$
                [-50.654  ,  -13.1229  ,  188.091  ,  0 ],$
                [131.682  ,  -191.427  ,  0  ,  0 ],$
                [-36.9821  ,  0  ,  0  ,  0 ]$
            ],$
            U_URc: [$
                [0,0,0,0],$
                [2.84791,2.31564,-0.411492,-0.0362256],$
                [-18.8238,13.2852,6.74212,-2.16222],$
                [-307.885,-124.303,-9.92117,12.7453],$
                [3040.57,428.811,-124.492,-14.3232],$
                [-10677.7,-39.2842,197.445,0],$
                [16022.4,-641.309,0,0],$
                [-8586.18,0,0,0]$
            ],$
            V_VIc: [$
                [0,0,0,0],$
                [-1.37734,-1.3982,4.76093,-1.59598],$
                [19.0533,-17.9194,8.32856,0.622176],$
                [-86.9899,-13.6809,-9.25747,0],$
                [305.09,39.4246,0,0],$
                [-324.357,0,0,0]$
            ],$
            V_VRc: [$
                [0,0,0,0],$
                [-2.21628,8.32648,-7.8023,9.53426],$
                [13.136,-1.18745,3.66083,-41.3694],$
                [-117.152,-28.1502,116.992,0],$
                [365.049,-93.68,0,0],$
                [-298.582,0,0,0]$
            ],$
            FUV_FUVNUV: [$
                [  0,0,0,0 ],$
                [  -0.866758,0.2405,0.155007,0.0807314 ],$
                [  -1.17598,6.90712,3.72288,-4.25468 ],$
                [  135.006,-56.4344,-1.19312,25.8617 ],$
                [  -1294.67,245.759,-84.6163,-40.8712 ],$
                [  4992.29,-477.139,174.281,0 ],$
                [  -8606.6,316.571,0,0 ],$
                [  5504.2,0,0,0 ]$
            ],$
            FUV_FUVu: [$
                [  0,0,0,0 ],$
                [  -1.67589,0.447786,0.369919,-0.0954247 ],$
                [  2.10419,6.49129,-2.54751,0.177888 ],$
                [  15.6521,-32.2339,4.4459,0 ],$
                [  -48.3912,37.1325,0,0 ],$
                [  37.0269,0,0,0 ]$
            ],$
            g_gi: [$
                [  0,0,0,0 ],$
                [  1.59269,-2.97991,7.31089,-3.46913 ],$
                [  -27.5631,-9.89034,15.4693,6.53131 ],$
                [  161.969,-76.171,-56.1923,0 ],$
                [  -204.457,217.977,0,0 ],$
                [  -50.6269,0,0,0 ]$
            ],$
            g_gz: [$
                [  0,0,0,0 ],$
                [  2.37454,-4.39943,7.29383,-2.90691 ],$
                [  -28.7217,-20.7783,18.3055,5.04468 ],$
                [  220.097,-81.883,-55.8349,0 ],$
                [  -290.86,253.677,0,0 ],$
                [  -73.5316,0,0,0 ]$
            ],$
            g_gr: [$
                [  0,0,0,0 ],$
                [  -2.45204,4.10188,10.5258,-13.5889 ],$
                [  56.7969,-140.913,144.572,57.2155 ],$
                [  -466.949,222.789,-917.46,-78.0591 ],$
                [  2906.77,1500.8,1689.97,30.889 ],$
                [  -10453.7,-4419.56,-1011.01,0 ],$
                [  17568,3236.68,0,0 ],$
                [  -10820.7,0,0,0 ]$
            ],$
            H_JH: [$
                [  0,0,0,0 ],$
                [  -1.6196,3.55254,1.01414,-1.88023 ],$
                [  38.4753,-8.9772,-139.021,15.4588 ],$
                [  -417.861,89.1454,808.928,-18.9682 ],$
                [  2127.81,-405.755,-1710.95,-14.4226 ],$
                [  -5719,731.135,1284.35,0 ],$
                [  7813.57,-500.95,0,0 ],$
                [  -4248.19,0,0,0 ]$
            ],$
            H_HK: [$
                [  0,0,0,0 ],$
                [  0.812404,7.74956,1.43107,-10.3853 ],$
                [  -23.6812,-235.584,-147.582,188.064 ],$
                [  283.702,2065.89,721.859,-713.536 ],$
                [  -1697.78,-7454.39,-1100.02,753.04 ],$
                [  5076.66,11997.5,460.328,0 ],$
                [  -7352.86,-7166.83,0,0 ],$
                [  4125.88,0,0,0 ]$
            ],$
            i_gi: [$
                [  0,0,0,0 ],$
                [  -2.21853,3.94007,0.678402,-1.24751 ],$
                [  -15.7929,-19.3587,15.0137,2.27779 ],$
                [  118.791,-40.0709,-30.6727,0 ],$
                [  -134.571,125.799,0,0 ],$
                [  -55.4483,0,0,0 ]$
            ],$
            i_ui: [$
                [  0,0,0,0 ],$
                [  -3.91949,3.20431,-0.431124,-0.000912813 ],$
                [  -14.776,-6.56405,1.15975,0.0429679 ],$
                [  135.273,-1.30583,-1.81687,0 ],$
                [  -264.69,15.2846,0,0 ],$
                [  142.624,0,0,0 ]$
            ],$
            J_JH: [$
                [  0,0,0,0 ],$
                [  0.129195,1.57243,-2.79362,-0.177462 ],$
                [  -15.9071,-2.22557,-12.3799,-2.14159 ],$
                [  89.1236,65.4377,36.9197,0 ],$
                [  -209.27,-123.252,0,0 ],$
                [  180.138,0,0,0 ]$
            ],$
            J_JK: [$
                [  0,0,0,0 ],$
                [  0.0772766,2.17962,-4.23473,-0.175053 ],$
                [  -13.9606,-19.998,22.5939,-3.99985 ],$
                [  97.1195,90.4465,-21.6729,0 ],$
                [  -283.153,-106.138,0,0 ],$
                [  272.291,0,0,0 ]$
            ],$
            K_HK: [$
                [  0,0,0,0 ],$
                [  -2.83918,-2.60467,-8.80285,-1.62272 ],$
                [  14.0271,17.5133,42.3171,4.8453 ],$
                [  -77.5591,-28.7242,-54.0153,0 ],$
                [  186.489,10.6493,0,0 ],$
                [  -146.186,0,0,0 ]$
            ],$
            K_JK: [$
                [  0,0,0,0 ],$
                [  -2.58706,1.27843,-5.17966,2.08137 ],$
                [  9.63191,-4.8383,19.1588,-5.97411 ],$
                [  -55.0642,13.0179,-14.3262,0 ],$
                [  131.866,-13.6557,0,0 ],$
                [  -101.445,0,0,0 ]$
            ],$
            NUV_NUVr: [$
                [  0,0,0,0 ],$
                [  2.2112,-1.2776,0.219084,0.0181984 ],$
                [  -25.0673,5.02341,-0.759049,-0.0652431 ],$
                [  115.613,-5.18613,1.78492,0 ],$
                [  -278.442,-5.48893,0,0 ],$
                [  261.478,0,0,0 ]$
            ],$
            NUV_NUVg: [$
                [  0,0,0,0 ],$
                [  2.60443,-2.04106,0.52215,0.00028771 ],$
                [  -24.6891,5.70907,-0.552946,-0.131456 ],$
                [  95.908,-0.524918,1.28406,0 ],$
                [  -208.296,-10.2545,0,0 ],$
                [  186.442,0,0,0 ]$
            ],$
            r_gr: [$
                [  0,0,0,0 ],$
                [  1.83285,-2.71446,4.97336,-3.66864 ],$
                [  -19.7595,10.5033,18.8196,6.07785 ],$
                [  33.6059,-120.713,-49.299,0 ],$
                [  144.371,216.453,0,0 ],$
                [  -295.39,0,0,0 ]$
            ],$
            r_ur: [$
                [  0,0,0,0 ],$
                [  3.03458,-1.50775,0.576228,-0.0754155 ],$
                [  -47.8362,19.0053,-3.15116,0.286009 ],$
                [  154.986,-35.6633,1.09562,0 ],$
                [  -188.094,28.1876,0,0 ],$
                [  68.9867,0,0,0 ]$
            ],$
            u_ur: [$
                [  0,0,0,0 ],$
                [  10.3686,-6.12658,2.58748,-0.299322 ],$
                [  -138.069,45.0511,-10.8074,0.95854 ],$
                [  540.494,-43.7644,3.84259,0 ],$
                [  -1005.28,10.9763,0,0 ],$
                [  710.482,0,0,0 ]$
            ],$
            u_ui: [$
                [  0,0,0,0 ],$
                [  11.0679,-6.43368,2.4874,-0.276358 ],$
                [  -134.36,36.0764,-8.06881,0.788515 ],$
                [  528.447,-26.7358,0.324884,0 ],$
                [  -1023.1,13.8118,0,0 ],$
                [  721.096,0,0,0 ]$
            ],$
            u_uz: [$
                [  0,0,0,0 ],$
                [  11.9853,-6.71644,2.31366,-0.234388 ],$
                [  -137.024,35.7475,-7.48653,0.655665 ],$
                [  519.365,-20.9797,0.670477,0 ],$
                [  -1028.36,2.79717,0,0 ],$
                [  767.552,0,0,0 ]$
            ],$
            Y_YH: [$
                [  0,0,0,0 ],$
                [  -2.81404,10.7397,-0.869515,-11.7591 ],$
                [  10.0424,-58.4924,49.2106,23.6013 ],$
                [  -0.311944,84.2151,-100.625,0 ],$
                [  -45.306,3.77161,0,0 ],$
                [  41.1134,0,0,0 ]$
            ],$
            Y_YK: [$
                [  0,0,0,0 ],$
                [  -0.516651,6.86141,-9.80894,-0.410825 ],$
                [  -3.90566,-4.42593,51.4649,-2.86695 ],$
                [  -5.38413,-68.218,-50.5315,0 ],$
                [  57.4445,97.2834,0,0 ],$
                [  -64.6172,0,0,0 ]$
            ],$
            z_gz: [$
                [  0,0,0,0 ],$
                [  0.30146,-0.623614,1.40008,-0.534053 ],$
                [  -10.9584,-4.515,2.17456,0.913877 ],$
                [  66.0541,4.18323,-8.42098,0 ],$
                [  -169.494,14.5628,0,0 ],$
                [  144.021,0,0,0 ]$
            ],$
            z_rz: [$
                [  0,0,0,0 ],$
                [  0.669031,-3.08016,9.87081,-7.07135 ],$
                [  -18.6165,8.24314,-14.2716,13.8663 ],$
                [  94.1113,11.2971,-11.9588,0 ],$
                [  -225.428,-17.8509,0,0 ],$
                [  197.505,0,0,0 ]$
            ],$
            z_uz: [$
                [  0,0,0,0 ],$
                [  0.623441,-0.293199,0.16293,-0.0134639 ],$
                [  -21.567,5.93194,-1.41235,0.0714143 ],$
                [  82.8481,-0.245694,0.849976,0 ],$
                [  -185.812,-7.9729,0,0 ],$
                [  168.691,0,0,0 ]$
            ]$
    }

    tags = tag_names(coeff)
    tag_col = strupcase(filter_name+'_'+strcompress(strjoin(strsplit(colour_name,'-',/extr)),/remove_all))

    cidx = where(tags eq tag_col, ccnt)
    if(ccnt ne 1 or redshift ge 0.5) then begin
        message,'Fitting function not found or redshift is out of range',/inf
        return,!values.f_nan
    endif
    c=coeff.(cidx)
    s_c = size(c)

    kcor=0.0

    for i=0, s_c[1]-1 do begin
        for j=0, s_c[2]-1 do begin
            kcor = kcor+colour_value^i*redshift^j*c[i,j]    
        endfor
    endfor

    return, kcor
   
end

Python   download calc_kcor.py
def calc_kcor(filter_name, redshift, colour_name, colour_value):
    """
    K-corrections calculator in Python. See http://kcor.sai.msu.ru for the 
    reference. Available filter-colour combinations must be present in the 
    `coeff` dictionary keys.

    @type   filter_name: string    
    @param  filter_name: Name of the filter to calculate K-correction for, e.g. 
                         'u', 'g', 'r' for some of the SDSS filters, or 'J2', 
                         'H2', 'Ks2' for 2MASS filters (must be present in 
                         `coeff` dictionary)
    @type      redshift: float    
    @param     redshift: Redshift of a galaxy, should be between 0.0 and 0.5 (no
                         check is made, however)
    @type   colour_name: string    
    @param  colour_name: Human name of the colour, e.g. 'u - g', 'g - r', 
                         'V - Rc', 'J2 - Ks2' (must be present in `coeff` dictionary)
    @type  colour_value: float    
    @param colour_value: Value of the galaxy's colour, specified in colour_name    
    @rtype:              float
    @return:             K-correction in specified filter for given redshift and 
                         colour
    @version:            2012
    @author:             Chilingarian, I., Melchior. A.-L., and Zolotukhin, I.
    @license:            Simplified BSD license, see http://kcor.sai.msu.ru/license.txt

    Usage example:
    
        >>> calc_kcor('g', 0.2, 'g - r', 1.1)
        0.5209713975999992
        >>> calc_kcor('Ic', 0.4, 'V - Ic', 2.0)
        0.310069919999993
        >>> calc_kcor('H', 0.5, 'H - K', 0.1)
        -0.14983142499999502
        
    """
    coeff = {

        'B_BRc': [
            [0,0,0,0],
            [-1.99412,3.45377,0.818214,-0.630543],
            [15.9592,-3.99873,6.44175,0.828667],
            [-101.876,-44.4243,-12.6224,0],
            [299.29,86.789,0,0],
            [-304.526,0,0,0],
        ],
        
        'B_BIc': [
            [0,0,0,0],
            [2.11655,-5.28948,4.5095,-0.8891],
            [24.0499,-4.76477,-1.55617,1.85361],
            [-121.96,7.73146,-17.1605,0],
            [236.222,76.5863,0,0],
            [-281.824,0,0,0],
        ],

        'H2_H2Ks2': [
            [0,0,0,0],
            [-1.88351,1.19742,10.0062,-18.0133],
            [11.1068,20.6816,-16.6483,139.907],
            [-79.1256,-406.065,-48.6619,-430.432],
            [551.385,1453.82,354.176,473.859],
            [-1728.49,-1785.33,-705.044,0],
            [2027.48,950.465,0,0],
            [-741.198,0,0,0],
        ],

        'H2_J2H2': [
            [0,0,0,0],
            [-4.99539,5.79815,4.19097,-7.36237],
            [70.4664,-202.698,244.798,-65.7179],
            [-142.831,553.379,-1247.8,574.124],
            [-414.164,1206.23,467.602,-799.626],
            [763.857,-2270.69,1845.38,0],
            [-563.812,-1227.82,0,0],
            [1392.67,0,0,0],
        ],

        'Ic_VIc': [
            [0,0,0,0],
            [-7.92467,17.6389,-15.2414,5.12562],
            [15.7555,-1.99263,10.663,-10.8329],
            [-88.0145,-42.9575,46.7401,0],
            [266.377,-67.5785,0,0],
            [-164.217,0,0,0],
        ],

        'J2_J2Ks2': [
            [0,0,0,0],
            [-2.85079,1.7402,0.754404,-0.41967],
            [24.1679,-34.9114,11.6095,0.691538],
            [-32.3501,59.9733,-29.6886,0],
            [-30.2249,43.3261,0,0],
            [-36.8587,0,0,0],
        ],

        'J2_J2H2': [
            [0,0,0,0],
            [-0.905709,-4.17058,11.5452,-7.7345],
            [5.38206,-6.73039,-5.94359,20.5753],
            [-5.99575,32.9624,-72.08,0],
            [-19.9099,92.1681,0,0],
            [-45.7148,0,0,0],
        ],

        'Ks2_J2Ks2': [
            [0,0,0,0],
            [-5.08065,-0.15919,4.15442,-0.794224],
            [62.8862,-61.9293,-2.11406,1.56637],
            [-191.117,212.626,-15.1137,0],
            [116.797,-151.833,0,0],
            [41.4071,0,0,0],
        ],

        'Ks2_H2Ks2': [
            [0,0,0,0],
            [-3.90879,5.05938,10.5434,-10.9614],
            [23.6036,-97.0952,14.0686,28.994],
            [-44.4514,266.242,-108.639,0],
            [-15.8337,-117.61,0,0],
            [28.3737,0,0,0],
        ],

        'Rc_BRc': [
            [0,0,0,0],
            [-2.83216,4.64989,-2.86494,0.90422],
            [4.97464,5.34587,0.408024,-2.47204],
            [-57.3361,-30.3302,18.4741,0],
            [224.219,-19.3575,0,0],
            [-194.829,0,0,0],
        ],

        'Rc_VRc': [
            [0,0,0,0],
            [-3.39312,16.7423,-29.0396,25.7662],
            [5.88415,6.02901,-5.07557,-66.1624],
            [-50.654,-13.1229,188.091,0],
            [131.682,-191.427,0,0],
            [-36.9821,0,0,0],
        ],

        'U_URc': [
            [0,0,0,0],
            [2.84791,2.31564,-0.411492,-0.0362256],
            [-18.8238,13.2852,6.74212,-2.16222],
            [-307.885,-124.303,-9.92117,12.7453],
            [3040.57,428.811,-124.492,-14.3232],
            [-10677.7,-39.2842,197.445,0],
            [16022.4,-641.309,0,0],
            [-8586.18,0,0,0],
        ],

        'V_VIc': [
            [0,0,0,0],
            [-1.37734,-1.3982,4.76093,-1.59598],
            [19.0533,-17.9194,8.32856,0.622176],
            [-86.9899,-13.6809,-9.25747,0],
            [305.09,39.4246,0,0],
            [-324.357,0,0,0],
        ],

        'V_VRc': [
            [0,0,0,0],
            [-2.21628,8.32648,-7.8023,9.53426],
            [13.136,-1.18745,3.66083,-41.3694],
            [-117.152,-28.1502,116.992,0],
            [365.049,-93.68,0,0],
            [-298.582,0,0,0],
        ],

        'FUV_FUVNUV': [
            [0,0,0,0],
            [-0.866758,0.2405,0.155007,0.0807314],
            [-1.17598,6.90712,3.72288,-4.25468],
            [135.006,-56.4344,-1.19312,25.8617],
            [-1294.67,245.759,-84.6163,-40.8712],
            [4992.29,-477.139,174.281,0],
            [-8606.6,316.571,0,0],
            [5504.2,0,0,0],
        ],

        'FUV_FUVu': [
            [0,0,0,0],
            [-1.67589,0.447786,0.369919,-0.0954247],
            [2.10419,6.49129,-2.54751,0.177888],
            [15.6521,-32.2339,4.4459,0],
            [-48.3912,37.1325,0,0],
            [37.0269,0,0,0],
        ],

        'g_gi': [
            [0,0,0,0],
            [1.59269,-2.97991,7.31089,-3.46913],
            [-27.5631,-9.89034,15.4693,6.53131],
            [161.969,-76.171,-56.1923,0],
            [-204.457,217.977,0,0],
            [-50.6269,0,0,0],
        ],

        'g_gz': [
            [0,0,0,0],
            [2.37454,-4.39943,7.29383,-2.90691],
            [-28.7217,-20.7783,18.3055,5.04468],
            [220.097,-81.883,-55.8349,0],
            [-290.86,253.677,0,0],
            [-73.5316,0,0,0],
        ],

        'g_gr': [
            [0,0,0,0],
            [-2.45204,4.10188,10.5258,-13.5889],
            [56.7969,-140.913,144.572,57.2155],
            [-466.949,222.789,-917.46,-78.0591],
            [2906.77,1500.8,1689.97,30.889],
            [-10453.7,-4419.56,-1011.01,0],
            [17568,3236.68,0,0],
            [-10820.7,0,0,0],
        ],

        'H_JH': [
            [0,0,0,0],
            [-1.6196,3.55254,1.01414,-1.88023],
            [38.4753,-8.9772,-139.021,15.4588],
            [-417.861,89.1454,808.928,-18.9682],
            [2127.81,-405.755,-1710.95,-14.4226],
            [-5719,731.135,1284.35,0],
            [7813.57,-500.95,0,0],
            [-4248.19,0,0,0],
        ],

        'H_HK': [
            [0,0,0,0],
            [0.812404,7.74956,1.43107,-10.3853],
            [-23.6812,-235.584,-147.582,188.064],
            [283.702,2065.89,721.859,-713.536],
            [-1697.78,-7454.39,-1100.02,753.04],
            [5076.66,11997.5,460.328,0],
            [-7352.86,-7166.83,0,0],
            [4125.88,0,0,0],
        ],

        'i_gi': [
            [0,0,0,0],
            [-2.21853,3.94007,0.678402,-1.24751],
            [-15.7929,-19.3587,15.0137,2.27779],
            [118.791,-40.0709,-30.6727,0],
            [-134.571,125.799,0,0],
            [-55.4483,0,0,0],
        ],

        'i_ui': [
            [0,0,0,0],
            [-3.91949,3.20431,-0.431124,-0.000912813],
            [-14.776,-6.56405,1.15975,0.0429679],
            [135.273,-1.30583,-1.81687,0],
            [-264.69,15.2846,0,0],
            [142.624,0,0,0],
        ],

        'J_JH': [
            [0,0,0,0],
            [0.129195,1.57243,-2.79362,-0.177462],
            [-15.9071,-2.22557,-12.3799,-2.14159],
            [89.1236,65.4377,36.9197,0],
            [-209.27,-123.252,0,0],
            [180.138,0,0,0],
        ],

        'J_JK': [
            [0,0,0,0],
            [0.0772766,2.17962,-4.23473,-0.175053],
            [-13.9606,-19.998,22.5939,-3.99985],
            [97.1195,90.4465,-21.6729,0],
            [-283.153,-106.138,0,0],
            [272.291,0,0,0],
        ],

        'K_HK': [
            [0,0,0,0],
            [-2.83918,-2.60467,-8.80285,-1.62272],
            [14.0271,17.5133,42.3171,4.8453],
            [-77.5591,-28.7242,-54.0153,0],
            [186.489,10.6493,0,0],
            [-146.186,0,0,0],
        ],

        'K_JK': [
            [0,0,0,0],
            [-2.58706,1.27843,-5.17966,2.08137],
            [9.63191,-4.8383,19.1588,-5.97411],
            [-55.0642,13.0179,-14.3262,0],
            [131.866,-13.6557,0,0],
            [-101.445,0,0,0],
        ],

        'NUV_NUVr': [
            [0,0,0,0],
            [2.2112,-1.2776,0.219084,0.0181984],
            [-25.0673,5.02341,-0.759049,-0.0652431],
            [115.613,-5.18613,1.78492,0],
            [-278.442,-5.48893,0,0],
            [261.478,0,0,0],
        ],

        'NUV_NUVg': [
            [0,0,0,0],
            [2.60443,-2.04106,0.52215,0.00028771],
            [-24.6891,5.70907,-0.552946,-0.131456],
            [95.908,-0.524918,1.28406,0],
            [-208.296,-10.2545,0,0],
            [186.442,0,0,0],
        ],

        'r_gr': [
            [0,0,0,0],
            [1.83285,-2.71446,4.97336,-3.66864],
            [-19.7595,10.5033,18.8196,6.07785],
            [33.6059,-120.713,-49.299,0],
            [144.371,216.453,0,0],
            [-295.39,0,0,0],
        ],

        'r_ur': [
            [0,0,0,0],
            [3.03458,-1.50775,0.576228,-0.0754155],
            [-47.8362,19.0053,-3.15116,0.286009],
            [154.986,-35.6633,1.09562,0],
            [-188.094,28.1876,0,0],
            [68.9867,0,0,0],
        ],

        'u_ur': [
            [0,0,0,0],
            [10.3686,-6.12658,2.58748,-0.299322],
            [-138.069,45.0511,-10.8074,0.95854],
            [540.494,-43.7644,3.84259,0],
            [-1005.28,10.9763,0,0],
            [710.482,0,0,0],
        ],

        'u_ui': [
            [0,0,0,0],
            [11.0679,-6.43368,2.4874,-0.276358],
            [-134.36,36.0764,-8.06881,0.788515],
            [528.447,-26.7358,0.324884,0],
            [-1023.1,13.8118,0,0],
            [721.096,0,0,0],
        ],

        'u_uz': [
            [0,0,0,0],
            [11.9853,-6.71644,2.31366,-0.234388],
            [-137.024,35.7475,-7.48653,0.655665],
            [519.365,-20.9797,0.670477,0],
            [-1028.36,2.79717,0,0],
            [767.552,0,0,0],
        ],

        'Y_YH': [
            [0,0,0,0],
            [-2.81404,10.7397,-0.869515,-11.7591],
            [10.0424,-58.4924,49.2106,23.6013],
            [-0.311944,84.2151,-100.625,0],
            [-45.306,3.77161,0,0],
            [41.1134,0,0,0],
        ],

        'Y_YK': [
            [0,0,0,0],
            [-0.516651,6.86141,-9.80894,-0.410825],
            [-3.90566,-4.42593,51.4649,-2.86695],
            [-5.38413,-68.218,-50.5315,0],
            [57.4445,97.2834,0,0],
            [-64.6172,0,0,0],
        ],

        'z_gz': [
            [0,0,0,0],
            [0.30146,-0.623614,1.40008,-0.534053],
            [-10.9584,-4.515,2.17456,0.913877],
            [66.0541,4.18323,-8.42098,0],
            [-169.494,14.5628,0,0],
            [144.021,0,0,0],
        ],

        'z_rz': [
            [0,0,0,0],
            [0.669031,-3.08016,9.87081,-7.07135],
            [-18.6165,8.24314,-14.2716,13.8663],
            [94.1113,11.2971,-11.9588,0],
            [-225.428,-17.8509,0,0],
            [197.505,0,0,0],
        ],

        'z_uz': [
            [0,0,0,0],
            [0.623441,-0.293199,0.16293,-0.0134639],
            [-21.567,5.93194,-1.41235,0.0714143],
            [82.8481,-0.245694,0.849976,0],
            [-185.812,-7.9729,0,0],
            [168.691,0,0,0],
        ],

    }

    c = coeff[filter_name + '_' + colour_name.replace(' - ', '')]
    kcor = 0.0

    for x, a in enumerate(c):
	    for y, b in enumerate(c[x]):
		    kcor += c[x][y] * redshift**x * colour_value**y
				
    return kcor
    
if __name__ == "__main__":
    import doctest
    doctest.testmod()