Attached is some data obtained _earlier_ from some calibration frames. The data looks good so rather than throw it out, I have reported it. Johnson R filter comparison star = 8.64R error ±0.02 yyyymmdd (UT) mag obs SGEWZ 20010725.142 8.436R GGA SGEWZ 20010725.143 8.459R GGA SGEWZ 20010725.144 8.507R GGA SGEWZ 20010725.145 8.484R GGA SGEWZ 20010725.146 8.470R GGA SGEWZ 20010725.147 8.423R GGA SGEWZ 20010725.148 8.432R GGA SGEWZ 20010725.149 8.417R GGA SGEWZ 20010725.150 8.399R GGA SGEWZ 20010725.151 8.398R GGA SGEWZ 20010725.152 8.367R GGA SGEWZ 20010725.153 8.319R GGA SGEWZ 20010725.154 8.321R GGA SGEWZ 20010725.157 8.379R GGA SGEWZ 20010725.158 8.506R GGA Gerry A. Good Albuquerque, New Mexico, USA