Kato-san help me find an error in the method that my software calculates the JD from the local time. This is corrected data from my previous post. Sorry for the inconvenience. Donn Starkey Prayer has no bandwidth limitations starkey@fwi.com www.starkey.ws ----------------------------------- WZ Sge data for July 26, 2001 AIP4Win Multi-Image Photometry Tool Analysis of 287 images Image time = time in FITS file header or log file. JD calculated from image time plus half of exposure duration. JD time zone correction added = 5 hours. JD heliocentric correction added = 0 seconds. Comparison Star: GSC 1621:1830 V-C mag UT Julian Day 0.118 2452117.62726 0.113 2452117.62795 0.116 2452117.62865 0.138 2452117.62934 0.115 2452117.63003 0.125 2452117.63073 0.128 2452117.63142 0.117 2452117.63212 0.096 2452117.63281 0.202 2452117.63420 0.198 2452117.63490 0.126 2452117.63559 0.115 2452117.63628 0.045 2452117.63698 0.043 2452117.63767 0.043 2452117.63837 0.049 2452117.63906 0.026 2452117.63976 0.022 2452117.64045 0.057 2452117.64115 0.078 2452117.64184 0.053 2452117.64253 0.101 2452117.64323 0.109 2452117.64392 0.124 2452117.64462 0.116 2452117.64531 0.112 2452117.64601 0.169 2452117.64670 0.116 2452117.64740 0.122 2452117.64809 0.091 2452117.64878 0.103 2452117.65017 0.064 2452117.65087 0.046 2452117.65156 0.093 2452117.65226 0.057 2452117.65295 0.100 2452117.65365 0.071 2452117.65434 0.096 2452117.65503 0.109 2452117.65573 0.070 2452117.65642 0.060 2452117.65712 0.070 2452117.65781 0.069 2452117.65851 0.013 2452117.65920 0.069 2452117.65990 0.067 2452117.66059 -0.003 2452117.66128 -0.054 2452117.66198 -0.015 2452117.66267 -0.066 2452117.66337 -0.046 2452117.66406 -0.032 2452117.66476 0.003 2452117.66545 -0.063 2452117.66615 -0.080 2452117.66684 -0.153 2452117.66753 -0.118 2452117.66823 -0.092 2452117.66892 -0.086 2452117.66962 -0.103 2452117.67031 -0.090 2452117.67101 -0.126 2452117.67170 -0.092 2452117.67240 -0.005 2452117.67309 0.002 2452117.67378 -0.038 2452117.67448 -0.064 2452117.67517 0.015 2452117.67587 -0.091 2452117.67656 0.023 2452117.67726 0.079 2452117.67795 0.086 2452117.67865 0.080 2452117.67934 0.097 2452117.68003 0.100 2452117.68073 0.075 2452117.68142 0.158 2452117.68212 0.148 2452117.68281 0.093 2452117.68351 0.065 2452117.68420 0.099 2452117.68488 0.116 2452117.68559 0.159 2452117.68628 0.086 2452117.68697 0.192 2452117.68766 0.139 2452117.68836 0.131 2452117.68905 0.092 2452117.68975 0.088 2452117.69045 0.074 2452117.69113 0.064 2452117.69183 0.069 2452117.69252 0.093 2452117.69322 0.151 2452117.69391 0.022 2452117.69461 0.030 2452117.69530 0.038 2452117.69600 0.024 2452117.69669 0.059 2452117.69738 -0.013 2452117.69808 0.026 2452117.69877 0.097 2452117.69947 0.067 2452117.70016 0.065 2452117.70086 0.107 2452117.70155 0.116 2452117.70225 0.046 2452117.70428 0.130 2452117.70498 0.081 2452117.70567 0.104 2452117.70637 0.172 2452117.70706 0.089 2452117.70775 0.096 2452117.70845 0.107 2452117.70914 0.059 2452117.70984 0.092 2452117.71053 0.118 2452117.71123 0.088 2452117.71192 0.126 2452117.71262 0.065 2452117.71331 0.045 2452117.71400 0.047 2452117.71470 -0.006 2452117.71539 0.019 2452117.71609 0.030 2452117.71678 -0.037 2452117.71748 -0.005 2452117.71817 -0.035 2452117.71887 -0.021 2452117.71956 -0.049 2452117.72025 -0.050 2452117.72095 -0.036 2452117.72164 -0.076 2452117.72234 -0.094 2452117.72303 -0.138 2452117.72373 -0.133 2452117.72442 -0.056 2452117.72512 -0.103 2452117.72581 -0.038 2452117.72650 -0.084 2452117.72720 -0.115 2452117.72789 -0.125 2452117.72859 -0.091 2452117.72928 -0.088 2452117.72998 -0.063 2452117.73067 -0.011 2452117.73137 -0.014 2452117.73206 0.034 2452117.73275 -0.008 2452117.73345 0.050 2452117.73414 0.042 2452117.73484 0.037 2452117.73553 0.011 2452117.73623 0.048 2452117.73692 0.041 2452117.73762 -0.023 2452117.73831 0.041 2452117.73900 0.062 2452117.73970 0.070 2452117.74039 0.120 2452117.74109 0.121 2452117.74178 0.132 2452117.74247 0.117 2452117.74317 0.157 2452117.74385 0.134 2452117.74455 0.141 2452117.74524 0.140 2452117.74594 0.112 2452117.74663 0.066 2452117.74733 0.093 2452117.74802 0.103 2452117.74872 0.127 2452117.74941 0.105 2452117.75010 0.102 2452117.75080 0.125 2452117.75149 0.099 2452117.75219 0.119 2452117.75288 0.069 2452117.75358 0.084 2452117.75427 0.068 2452117.75497 0.057 2452117.75566 0.074 2452117.75635 0.092 2452117.75705 0.077 2452117.75774 0.088 2452117.75844 0.116 2452117.75913 0.067 2452117.75983 0.097 2452117.76052 0.084 2452117.76122 0.033 2452117.76191 0.040 2452117.76260 0.020 2452117.76330 0.056 2452117.76399 0.067 2452117.76469 0.064 2452117.76538 0.103 2452117.76608 0.073 2452117.76677 0.048 2452117.76747 0.043 2452117.76816 0.060 2452117.76885 0.032 2452117.76955 0.038 2452117.77024 0.009 2452117.77094 0.003 2452117.77163 -0.009 2452117.77233 -0.051 2452117.77302 0.006 2452117.77372 0.014 2452117.77441 -0.044 2452117.77510 -0.079 2452117.77580 -0.044 2452117.77649 -0.057 2452117.77719 -0.111 2452117.77788 -0.074 2452117.77858 -0.106 2452117.77927 -0.117 2452117.77997 -0.066 2452117.78066 -0.119 2452117.78135 -0.099 2452117.78205 -0.094 2452117.78274 -0.062 2452117.78344 -0.082 2452117.78413 -0.066 2452117.78483 -0.020 2452117.78552 -0.013 2452117.78622 -0.050 2452117.78691 0.008 2452117.78760 -0.017 2452117.78830 0.004 2452117.78899 0.003 2452117.78969 0.026 2452117.79038 0.077 2452117.79108 0.080 2452117.79177 0.101 2452117.79247 0.113 2452117.79316 0.103 2452117.79385 0.111 2452117.79455 0.099 2452117.79524 0.113 2452117.79594 0.132 2452117.79663 0.151 2452117.79733 0.151 2452117.79802 0.205 2452117.79872 0.236 2452117.79941 0.263 2452117.80010 0.229 2452117.80080 0.231 2452117.80149 0.220 2452117.80219 0.190 2452117.80288 0.135 2452117.80358 0.124 2452117.80427 0.129 2452117.80497 0.094 2452117.80566 0.076 2452117.80635 0.095 2452117.80705 0.066 2452117.80774 0.097 2452117.80844 0.042 2452117.80913 0.031 2452117.80983 0.034 2452117.81052 0.070 2452117.81122 0.031 2452117.81191 0.037 2452117.81260 0.033 2452117.81330 0.061 2452117.81399 0.090 2452117.81469 0.072 2452117.81538 0.089 2452117.81608 0.099 2452117.81677 0.079 2452117.81745 0.077 2452117.81816 0.114 2452117.81885 0.107 2452117.81954 0.109 2452117.82023 0.079 2452117.82093 0.049 2452117.82162 0.080 2452117.82231 0.048 2452117.82301 0.069 2452117.82370 0.057 2452117.82440 0.119 2452117.82509 0.059 2452117.82579 0.040 2452117.82648 0.057 2452117.82718 0.006 2452117.82787 -0.014 2452117.82856