1 | /* ======================================================================== *\
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2 | !
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3 | ! *
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4 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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5 | ! * Software. It is distributed to you in the hope that it can be a useful
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6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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7 | ! * It is distributed WITHOUT ANY WARRANTY.
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8 | ! *
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9 | ! * Permission to use, copy, modify and distribute this software and its
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10 | ! * documentation for any purpose is hereby granted without fee,
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11 | ! * provided that the above copyright notice appear in all copies and
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12 | ! * that both that copyright notice and this permission notice appear
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13 | ! * in supporting documentation. It is provided "as is" without express
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14 | ! * or implied warranty.
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15 | ! *
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16 | !
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17 | !
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18 | ! Author(s): Harald Kornmayer 1/2001 (harald@mppmu.mpg.de)
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19 | ! Author(s): Thomas Bretz 12/2000 (tbretz@uni-sw.gwdg.de)
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20 | !
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21 | ! Copyright: MAGIC Software Development, 2000-2001
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22 | !
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23 | !
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24 | \* ======================================================================== */
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25 |
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26 | #include "MHMcRate.h"
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27 |
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28 | #include "MLog.h"
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29 | #include "MLogManip.h"
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30 |
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31 | ClassImp(MHMcRate);
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32 |
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33 | void MHMcRate::Init(const char *name, const char *title)
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34 | {
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35 | fName = name ? name : "MMcTriggerRate";
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36 | fTitle = title ? title : "Task to calc the collection area ";
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37 |
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38 | fPartId=0; // Type of particle
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39 |
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40 | fEnergyMax=0.0; // Maximum Energy in GeV
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41 | fEnergyMin=1000000.0; // Minimum Energy in GeV
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42 |
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43 | fThetaMax=0.0; // Maximum theta angle of run
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44 | fThetaMin=370.0; // Minimum theta angle of run
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45 | fPhiMax=0.0; // Maximum phi angle of run
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46 | fPhiMin=370.0; // Minimum phi angle of run
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47 |
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48 | fImpactMax=0.0; // Maximum impact parameter
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49 | fImpactMin=100000.0; // Minimum impact parameter
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50 |
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51 | fBackTrig=-1.0; // Number of triggers from background
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52 | fBackSim=-1.0; // Number of simulated showers for the background
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53 |
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54 | fTriggerRate= -1.0; // Trigger rate in Hz
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55 | fTriggerRateError= -1.0; // Estimated error for the trigger rate in Hz
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56 | }
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57 |
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58 | // --------------------------------------------------------------------------
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59 | //
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60 | // default constructor
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61 | // fills all member data with initial values
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62 | //
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63 | MHMcRate::MHMcRate(const char *name, const char *title)
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64 | {
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65 | Init(name, title);
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66 |
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67 | fSpecIndex=0.0; // dn/dE = k * e^{- fSpecIndex}
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68 | fFlux0=-1.0; // dn/dE = fFlux0 * E^{-a}
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69 |
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70 | fShowerRate= -1.0; // Showers rate in Hz
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71 | fShowerRateError=0.0; // Estimated error of shower rate in Hz
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72 | }
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73 |
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74 | // --------------------------------------------------------------------------
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75 | //
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76 | // overloaded constructor I
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77 | // fills all member data with initial values and sets the rate of
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78 | // incident showers to ShowRate
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79 | //
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80 | MHMcRate::MHMcRate(Float_t showrate,
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81 | const char *name, const char *title)
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82 | {
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83 | Init(name, title);
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84 |
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85 | fSpecIndex=0.0; // dn/dE = k * e^{- fSpecIndex}
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86 | fFlux0=-1.0; // dn/dE = fFlux0 * E^{-a}
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87 |
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88 | fShowerRate= showrate; // Showers rate in Hz
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89 | fShowerRateError=sqrt(showrate); // Estimated error of shower rate in Hz
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90 | }
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91 |
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92 | // --------------------------------------------------------------------------
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93 | //
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94 | // overloaded constructor I
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95 | // fills all member data with initial values and sets the
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96 | // spectral index and the initial flux to SpecIndex and Flux0
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97 | //
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98 | MHMcRate::MHMcRate(Float_t specindex, Float_t flux0,
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99 | const char *name, const char *title)
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100 | {
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101 | Init(name, title);
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102 |
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103 | fSpecIndex=specindex; // dn/dE = k * e^{- fSpecIndex}
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104 | fFlux0=flux0; // dn/dE = fFlux0 * E^{-a}
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105 |
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106 | fShowerRate= -1.0;
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107 | fShowerRateError=0.0;
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108 | }
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109 |
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110 | // --------------------------------------------------------------------------
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111 | //
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112 | // set the particle that produces the showers in the athmosphere
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113 | //
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114 | void MHMcRate:: SetParticle(UShort_t part)
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115 | {
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116 | fPartId=part;
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117 | }
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118 |
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119 | // --------------------------------------------------------------------------
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120 | //
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121 | // Set the information about trigger due only to the background conditions
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122 | //
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123 | void MHMcRate::SetBackground (Float_t showers, Float_t triggers)
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124 | {
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125 | fBackTrig=showers; // Number of triggers from background
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126 | fBackSim=triggers; // Number of simulated showers for the background
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127 | }
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128 |
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129 | // --------------------------------------------------------------------------
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130 | //
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131 | // update the limits for energy, theta, phi and impact parameter
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132 | //
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133 | void MHMcRate::UpdateBoundaries(Float_t energy, Float_t theta,
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134 | Float_t phi, Float_t impact)
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135 | {
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136 | // It updates the limit values
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137 |
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138 | if (fThetaMax<theta) fThetaMax=theta;
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139 | if (fThetaMin>theta) fThetaMin=theta;
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140 |
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141 | if (fPhiMax<phi) fPhiMax=phi;
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142 | if (fPhiMin>phi) fPhiMin=phi;
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143 |
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144 | if (fImpactMax<impact) fImpactMax=impact;
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145 | if (fImpactMin>impact) fImpactMin=impact;
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146 |
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147 | if (fEnergyMax<energy) fEnergyMax=energy;
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148 | if (fEnergyMin>energy) fEnergyMin=energy;
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149 | }
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150 |
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151 | // --------------------------------------------------------------------------
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152 | //
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153 | // compute the trigger rate
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154 | //
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155 | void MHMcRate::CalcRate(Float_t trig, Float_t anal, Float_t simu)
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156 | {
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157 | // It computes the trigger rate
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158 |
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159 | // First one computes the rate of incident showers.
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160 | const Double_t specidx = 1.0-fSpecIndex;
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161 |
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162 | const Double_t epowmax = pow(fEnergyMax, specidx);
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163 | const Double_t epowmin = pow(fEnergyMin, specidx);
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164 |
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165 | fShowerRate = fFlux0/specidx*(epowmax-epowmin);
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166 |
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167 | if (fPartId!=1)
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168 | fShowerRate *= (fPhiMax-fPhiMin)*(cos(fThetaMax)-cos(fThetaMin));
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169 |
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170 | const Double_t impactdiff = fImpactMax-fImpactMin;
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171 |
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172 | fShowerRate *= TMath::Pi()*(impactdiff/100.0*impactdiff/100.0);
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173 |
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174 | fShowerRateError = sqrt(fShowerRate);
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175 |
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176 | const Double_t anal2 = 1.0-anal*160.0e-9;
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177 | const Double_t back2 = fBackSim*160.0e-9;
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178 |
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179 | // Then the trigger rate and its error is evaluated
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180 | if(fBackTrig<0){
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181 | fTriggerRateError = sqrt((trig*fShowerRate*fShowerRate/(simu*simu)) +
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182 | (anal2*anal2*1/(fBackSim*back2*back2)));
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183 | fBackTrig=0;
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184 | }
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185 | else
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186 | fTriggerRateError = sqrt((trig*fShowerRate*fShowerRate/(simu*simu)) +
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187 | (anal2*anal2*fBackTrig/(back2*back2)));
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188 |
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189 | fTriggerRate = trig*fShowerRate/simu + anal2*fBackTrig/back2;
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190 | }
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191 |
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192 | // --------------------------------------------------------------------------
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193 | //
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194 | // print the trigger rate
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195 | //
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196 | void MHMcRate::Print(Option_t *) const
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197 | {
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198 | *fLog << "Incident rate " << fShowerRate << " Hz " << endl;
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199 | *fLog << "Trigger Rate " << fTriggerRate << " +- " << fTriggerRateError << " Hz" << endl;
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200 | }
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201 |
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202 | // --------------------------------------------------------------------------
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203 | //
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204 | // draw the trigger rate
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205 | //
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206 | void MHMcRate::Draw(Option_t *)
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207 | {
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208 | *fLog << dbginf << "To be iplemented" << endl;
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209 | }
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210 |
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211 | TObject *MHMcRate::DrawClone(Option_t *) const
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212 | {
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213 | *fLog << dbginf << "To be iplemented" << endl;
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214 | return NULL;
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215 | }
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