1 | #!/bin/env python |
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2 | # coding: utf-8 |
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3 | # Un programme pour exploiter les données des mires |
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4 | # -- Frédéric Meynadier |
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5 | |
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6 | import string |
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7 | from numpy import * |
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8 | |
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9 | from functions import * |
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10 | |
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11 | from optparse import OptionParser |
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12 | parser = OptionParser() |
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13 | parser.add_option("-c","--catalog",dest="catalogfile", |
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14 | help="Name of the catalog file") |
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15 | parser.add_option("-o","--outputfits",dest="outputfits", |
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16 | default="output.fits", |
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17 | help="Name of the output fits file") |
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18 | |
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19 | |
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20 | (options, args) = parser.parse_args () |
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21 | |
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22 | # Donner les coordonnées approximatives des 4 repÚres |
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23 | |
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24 | rep = zeros((4,2)) |
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25 | i = 0 |
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26 | for line in open('reperes.txt'): |
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27 | if ((line[0] != "#") and (line != '\n')): |
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28 | spl = string.split(line) |
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29 | rep[i][0] = float(spl[0]) |
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30 | rep[i][1] = float(spl[1]) |
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31 | i+=1 |
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32 | |
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33 | # Lecture du fichier catalogue |
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34 | fields = ["FLUX_MAX", |
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35 | "X_IMAGE", |
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36 | "Y_IMAGE", |
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37 | "THETA_IMAGE", |
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38 | "ELONGATION", |
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39 | "ELLIPTICITY", |
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40 | "FWHM_IMAGE", |
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41 | "ERRX2_IMAGE", |
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42 | "ERRY2_IMAGE"] |
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43 | |
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44 | catalog = [] |
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45 | for line in open(options.catalogfile): |
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46 | if ((line[0] != "#") and (line != '\n')): |
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47 | tmp = {} |
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48 | spl = string.split(line) |
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49 | for i in range(len(fields)): |
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50 | tmp[fields[i]] = float(spl[i]) |
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51 | catalog.append(tmp) |
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52 | |
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53 | |
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54 | # Recherche de la position des repÚres selon catalogue - attention aux doublons |
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55 | real_rep = zeros((4,2)) |
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56 | for i in range(4): |
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57 | detections = 0 |
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58 | for source in catalog: |
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59 | pos_source = array([source['X_IMAGE'],source['Y_IMAGE']]) |
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60 | if ((modulus(rep[i,:] - pos_source)) < 5): |
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61 | detections +=1 |
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62 | real_rep[i,:] = pos_source |
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63 | if (detections !=1): |
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64 | print "Attention ! ambiguïté pour repÚre ",i,\ |
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65 | ", nb de détections :",detections |
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66 | |
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67 | |
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68 | # Détermination du centre : barycentre des 4 repÚres |
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69 | center = array([sum(real_rep[:,0])/4,sum(real_rep[:,1])/4]) |
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70 | |
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71 | # Vecteurs unitaires de référence |
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72 | vec_i = ((real_rep[0,:] - real_rep[1,:])/20 \ |
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73 | + (real_rep[3,:] - real_rep[2,:])/20) / 2 |
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74 | vec_j = ((real_rep[1,:] - real_rep[2,:])/20 \ |
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75 | + (real_rep[0,:] - real_rep[3,:])/20) / 2 |
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76 | |
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77 | # Détection des noeuds de grille les plus proches de chaque source |
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78 | vec_i_2 = dot(vec_i,vec_i) |
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79 | vec_j_2 = dot(vec_j,vec_j) |
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80 | for source in catalog: |
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81 | pos_source = array([source['X_IMAGE'],source['Y_IMAGE']])-center |
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82 | # dans le référentiel grille (en projetant sur les vecteurs unitaires) : |
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83 | pos_source_grid = array([dot(pos_source,vec_i)/vec_i_2, |
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84 | dot(pos_source,vec_j)/vec_j_2]) |
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85 | # on arrondit au noeud le plus proche |
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86 | knot = pos_source_grid.round() |
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87 | # et on calcule la distance entre les deux |
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88 | r = modulus(pos_source_grid - knot) |
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89 | # enregistrement des résultats |
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90 | source['I_GRID'] = knot[0] |
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91 | source['J_GRID'] = knot[1] |
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92 | source['KNOT_DIST'] = r |
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93 | #if (modulus(knot) <1): |
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94 | # print source['I_GRID'], source['J_GRID'], source['KNOT_DIST'], pos_source_grid, pos_source,source['X_IMAGE'], source['Y_IMAGE'] |
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95 | |
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96 | # Chasse aux doublons |
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97 | # tableau 81*81 contenant : |
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98 | # champ 0 : nb de sources rattachée au noeud |
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99 | # champ 1 : distance actuelle entre le noeud et la source |
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100 | # champ 2 : index courant de la source dans catalog |
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101 | # champ 3 : distance moyenne aux voisins (calculé plus tard) |
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102 | lookup_sources = zeros((81,81,4)) |
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103 | for si in range(len(catalog)): |
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104 | source = catalog[si] |
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105 | i = source['I_GRID']+40 |
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106 | j = source['J_GRID']+40 |
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107 | if ((lookup_sources[i,j,0] < 1) |
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108 | or (lookup_sources[i,j,1] > source['KNOT_DIST'])): |
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109 | lookup_sources[i,j,2] = si |
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110 | lookup_sources[i,j,1] = source['KNOT_DIST'] |
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111 | lookup_sources[i,j,0] += 1 |
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112 | |
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113 | # On élimine le noeud (1,1), trop prÚs du "P" |
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114 | lookup_sources[41,41,0] = 0 |
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115 | |
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116 | # Calcul de la distance moyenne entre noeuds voisins |
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117 | |
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118 | for i in range(1,80): |
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119 | for j in range(1,80): |
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120 | if (lookup_sources[i,j,0] > 0): |
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121 | knot_idx = int(lookup_sources[i,j,2]) |
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122 | catalog[knot_idx]['MEAN_DIST_TO_NGBRS'] = 0 |
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123 | nb_voisin = 0 |
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124 | distance = 0 |
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125 | pos_source = array([catalog[knot_idx]['X_IMAGE'], |
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126 | catalog[knot_idx]['Y_IMAGE']]) |
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127 | for shifts in [[0,1],[1,0],[-1,0],[0,-1]]: |
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128 | i_voisin = i + shifts[0] |
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129 | j_voisin = j + shifts[1] |
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130 | if (lookup_sources[i_voisin,j_voisin,0] > 0): |
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131 | neigh_idx = int(lookup_sources[i_voisin,j_voisin,2]) |
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132 | nb_voisin +=1 |
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133 | pos_voisin = array([catalog[neigh_idx]['X_IMAGE'], |
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134 | catalog[neigh_idx]['Y_IMAGE']]) |
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135 | distance += modulus(pos_source-pos_voisin) |
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136 | if (nb_voisin !=0): |
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137 | catalog[knot_idx]['MEAN_DIST_TO_NGBRS'] = distance / nb_voisin |
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138 | lookup_sources[i,j,3] = distance / nb_voisin |
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139 | |
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140 | cleaned_catalog = [] |
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141 | for i in range(81): |
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142 | for j in range(81): |
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143 | if (lookup_sources[i,j,0] > 0): |
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144 | cleaned_catalog.append(catalog[int(lookup_sources[i,j,2])]) |
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145 | |
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146 | # Sortie du catalogue nettoyé des doublons |
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147 | |
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148 | of = open('clean.cat','w') |
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149 | |
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150 | fields = ["FLUX_MAX", |
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151 | "X_IMAGE", |
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152 | "Y_IMAGE", |
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153 | "THETA_IMAGE", |
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154 | "ELONGATION", |
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155 | "ELLIPTICITY", |
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156 | "FWHM_IMAGE", |
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157 | "ERRX2_IMAGE", |
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158 | "ERRY2_IMAGE", |
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159 | "I_GRID", |
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160 | "J_GRID", |
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161 | "KNOT_DIST", |
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162 | "MEAN_DIST_TO_NGBRS"] |
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163 | |
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164 | fmts = ["%10.3f ", |
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165 | "%8.3f ", |
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166 | "%8.3f ", |
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167 | "%8.3f ", |
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168 | "%8.3f ", |
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169 | "%8.3f ", |
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170 | "%8.3f ", |
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171 | "%8.5f ", |
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172 | "%8.5f ", |
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173 | "%5d ", |
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174 | "%5d ", |
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175 | "%5.3f ", |
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176 | "%8.3f"] |
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177 | |
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178 | for source in cleaned_catalog: |
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179 | outs = "" |
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180 | for i in range(len(fields)): |
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181 | outs += fmts[i] % source[fields[i]] |
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182 | outs += "\n" |
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183 | of.write(outs) |
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184 | |
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185 | of.close() |
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186 | |
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187 | # Génération d'un fichier fits contenant les résultats |
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188 | |
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189 | |
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190 | import pyfits |
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191 | |
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192 | #a = zeros((2048,2048)) |
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193 | # |
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194 | # patches width in pixel: |
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195 | ## width = int(modulus(vec_i)) |
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196 | |
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197 | ## for i in range(len(cleaned_catalog)): |
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198 | ## print i |
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199 | ## source = cleaned_catalog[i] |
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200 | ## pos_source = array([int(source['X_IMAGE']),int(source['Y_IMAGE'])]) |
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201 | ## pos_mean_dist = source['MEAN_DIST_TO_NGBRS'] |
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202 | ## for rel_x in range(-width,width): |
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203 | ## for rel_y in range(-width,width): |
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204 | ## rel_vec = array([rel_x,rel_y]) |
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205 | ## # Forme du patch : carré |
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206 | ## if ( (dot(rel_vec,vec_i) < vec_i_2/2) and |
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207 | ## (dot(rel_vec,vec_j) < vec_j_2/2)): |
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208 | ## (x,y) = pos_source+rel_vec |
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209 | ## if ( x>0 and x<2048 and y>0 and y<2048): |
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210 | ## a[x,y] = pos_mean_dist |
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211 | |
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212 | |
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213 | |
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214 | a = lookup_sources[:,:,3] |
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215 | |
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216 | hdu = pyfits.PrimaryHDU(a) |
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217 | hdulist = pyfits.HDUList([hdu]) |
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218 | |
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219 | hdu.writeto(options.outputfits,clobber=True) |
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220 | |
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221 | # Facteur d'échelle moyen |
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222 | |
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223 | tmp = [] |
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224 | for i in range(81): |
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225 | for j in range(81): |
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226 | if (lookup_sources[i,j,0] > 0): |
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227 | tmp.append(lookup_sources[i,j,3]) |
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228 | |
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229 | print "Moyenne des mesures : ",sum(tmp)/len(tmp) |
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230 | |
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231 | # Module des vecteurs unitaires |
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232 | |
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233 | print "Module vec_i :",modulus(vec_i) |
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234 | print "Module vec_j :",modulus(vec_j) |
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