IAU COMMISSION 27 UNPUBLISHED DATA FILE 305E Differential mean UBVRI observations of HD 6532. Differential mean UBVRI observations of the roAp star HD6532 were obtained in 1986, 1987 and 1994. The 1986 observations were published in MNRAS, 228, 141, 1987. They are included here along with the new 1987 and 1994 observations. Comparison stars used were HD 7259, HD6868 and HD7323 in the manner described in the above MNRAS article and in Kurtz etal, 1995, MNRAS, in press. The observations were not put onto the standard system, but only used to determine the rotation period of the star which is P = 1.944973 +- 0.000011 days. Consequently, the mean has been set to zero in each colour. The rotational variations are double wave and the second-order harmonic solution fits to a precision of sigU = 4.7 mmag; sigB = 4.1 mmag; sigV = 3.6 mmag; sigR = 3.5 mmag and sigI = 3.6 mmag per observation. Differences in two comparison stars, HD6868 and HD7323, give very similar standard deviation per observation. Kurtz D.W. University of Cape Town Rondebosch Republic of South Africa ******************************************************************************* HJD DU DB DV DR DI 6595.6599 0.0181 0.0062 -0.0088 6596.6673 0.0051 -0.0018 -0.0068 -0.0078 6597.6553 0.0241 0.0162 -0.0048 -0.0008 6601.6454 0.0191 0.0062 -0.0038 -0.0028 6603.6543 0.0151 0.0012 -0.0048 0.0022 6614.6385 -0.0189 0.0062 0.0022 6614.6670 -0.0149 0.0042 0.0012 6630.5843 0.0191 0.0162 -0.0058 -0.0028 6631.5620 0.0021 -0.0048 -0.0018 -0.0018 6633.5461 0.0031 -0.0048 -0.0048 0.0062 6641.5455 0.0041 -0.0008 -0.0078 -0.0138 6642.5033 0.0141 0.0042 -0.0048 -0.0098 6643.5305 0.0011 -0.0058 -0.0068 -0.0048 6644.4647 0.0111 0.0032 -0.0058 -0.0118 6644.6734 0.0011 -0.0068 0.0012 0.0072 6645.5265 0.0121 0.0082 0.0052 -0.0078 6649.5350 -0.0069 -0.0038 0.0012 -0.0058 6650.4710 -0.0009 -0.0058 0.0072 0.0082 6650.6605 -0.0029 -0.0098 0.0122 0.0172 6654.4677 -0.0089 -0.0038 0.0082 0.0092 6654.6521 -0.0109 -0.0118 0.0062 0.0042 6655.5611 -0.0089 0.0002 0.0032 -0.0008 6658.5089 -0.0059 -0.0088 0.0112 0.0132 6712.3876 0.0191 0.0092 -0.0088 -0.0135 -0.0078 6713.4476 0.0161 0.0032 -0.0048 -0.0105 -0.0028 6723.4643 -0.0199 -0.0028 0.0022 -0.0065 -0.0028 6724.5102 -0.0089 -0.0038 0.0112 0.0145 0.0192 6725.4937 -0.0149 -0.0018 -0.0028 -0.0025 0.0022 6729.3394 -0.0199 -0.0068 -0.0008 0.0005 -0.0028 6729.5266 -0.0129 0.0002 0.0062 0.0125 0.0112 6730.3927 -0.0109 -0.0078 0.0162 0.0165 0.0102 6739.3302 0.0021 0.0112 -0.0138 0.0025 0.0022 6740.2899 -0.0159 -0.0088 0.0102 0.0105 0.0122 6740.5281 0.0001 -0.0088 0.0042 0.0015 -0.0008 6741.2795 -0.0069 -0.0038 -0.0048 -0.0075 -0.0098 6744.3056 -0.0139 -0.0078 0.0052 0.0055 0.0042 6745.2885 0.0171 0.0152 0.0002 0.0025 -0.0038 6745.5097 0.0151 0.0042 -0.0108 -0.0135 -0.0098 6750.2869 0.0021 -0.0038 0.0002 -0.0075 -0.0018 6750.4627 0.0001 0.0032 -0.0008 -0.0035 -0.0038 6751.2861 0.0141 0.0052 -0.0058 -0.0035 -0.0058 6751.4716 0.0062 0.0012 -0.0015 0.0002 6752.3093 0.0001 -0.0058 -0.0018 -0.0055 -0.0038 7013.5784 0.0027 0.0053 -0.0004 -0.0016 -0.0105 7014.4737 -0.0193 -0.0117 0.0086 0.0124 0.0125 7014.6561 -0.0063 -0.0037 0.0006 0.0004 0.0025 7020.5548 -0.0063 -0.0077 -0.0044 0.0004 -0.0005 7021.5497 0.0147 0.0173 -0.0004 -0.0076 -0.0065 7021.6464 0.0157 0.0153 -0.0074 -0.0116 -0.0085 7022.5198 -0.0023 -0.0047 -0.0044 -0.0056 -0.0055 7023.5241 0.0157 0.0153 -0.0014 -0.0086 -0.0135 7023.6491 0.0157 0.0113 -0.0064 -0.0146 -0.0095 7025.4829 0.0117 0.0123 -0.0054 -0.0116 -0.0075 7025.6506 0.0097 0.0093 -0.0084 -0.0056 -0.0075 7048.5791 -0.0013 0.0093 0.0036 0.0014 0.0015 7068.3680 0.0117 0.0103 -0.0034 -0.0076 -0.0055 7070.3957 0.0077 0.0043 -0.0034 -0.0046 -0.0045 7071.3880 0.0057 0.0053 -0.0054 -0.0096 -0.0065 7072.4315 0.0107 0.0043 -0.0004 -0.0006 0.0005 7072.5492 0.0007 0.0003 0.0076 0.0124 0.0125 7073.4467 -0.0053 0.0023 -0.0014 -0.0076 -0.0045 7073.5428 -0.0123 -0.0067 0.0046 -0.0006 -0.0035 7074.4940 -0.0023 0.0003 0.0026 0.0114 0.0165 7075.3766 -0.0033 0.0033 -0.0004 -0.0026 -0.0005 7075.5526 -0.0073 -0.0067 -0.0004 0.0024 -0.0025 7077.4541 -0.0093 -0.0027 -0.0064 -0.0016 -0.0025 7077.5352 -0.0173 -0.0057 -0.0024 -0.0056 -0.0045 7078.3682 -0.0003 -0.0047 0.0006 0.0094 0.0105 7081.3629 -0.0133 -0.0097 -0.0024 -0.0046 -0.0015 7081.5257 -0.0113 -0.0037 0.0006 -0.0006 -0.0025 7096.3605 -0.0063 -0.0087 -0.0034 -0.0016 -0.0005 7096.4941 0.0077 0.0023 0.0026 -0.0026 -0.0015 7098.4893 -0.0003 -0.0017 -0.0074 -0.0096 -0.0075 7099.3555 0.0167 0.0083 -0.0054 -0.0136 -0.0095 7099.4696 0.0047 -0.0017 -0.0104 -0.0166 -0.0115 7101.3023 0.0177 0.0093 -0.0024 -0.0056 -0.0085 7138.3330 0.0217 0.0163 -0.0064 -0.0056 -0.0095 7142.3214 0.0227 0.0053 -0.0064 -0.0006 -0.0015 7143.3256 0.0067 -0.0007 -0.0054 -0.0036 -0.0055 7144.3358 0.0197 0.0093 -0.0004 0.0044 0.0065 7152.3634 0.0007 -0.0047 0.0126 0.0164 0.0135 7153.3039 -0.0123 -0.0057 -0.0014 -0.0026 -0.0065 7155.2990 -0.0083 -0.0047 0.0046 0.0054 0.0025 7156.3050 0.0007 -0.0067 0.0086 0.0214 0.0125 7157.3036 -0.0083 0.0003 0.0056 0.0074 0.0035 7159.3027 -0.0053 -0.0017 0.0086 0.0074 0.0045 7160.3018 -0.0063 -0.0107 0.0126 0.0164 0.0205 7163.3034 -0.0073 -0.0007 0.0036 0.0034 0.0055 9597.5741 0.0006 0.0043 0.0111 0.0065 0.0055 9598.5480 -0.0006 -0.0019 -0.0075 -0.0075 -0.0086 9601.5162 0.0044 0.0011 0.0042 0.0048 0.0039 9607.4356 0.0012 -0.0052 -0.0040 -0.0028 -0.0010 9608.4322 0.0190 0.0120 -0.0040 -0.0085 -0.0091 9616.5780 0.0029 0.0017 0.0078 9620.3917 0.0085 0.0031 0.0019 0.0037 0.0047 9620.5809 -0.0088 -0.0063 0.0087 0.0133 0.0139 9625.4474 -0.0148 -0.0043 0.0004 -0.0013 -0.0020 9625.6038 -0.0050 -0.0025 -0.0001 0.0010 -0.0016 9626.3417 -0.0049 -0.0043 0.0060 0.0080 0.0101 9627.5274 -0.0128 -0.0026 -0.0013 -0.0024 -0.0013 9629.3609 -0.0150 -0.0062 -0.0009 -0.0008 -0.0026 9639.3265 0.0050 0.0053 -0.0007 -0.0010 -0.0046 9639.5392 0.0209 0.0130 -0.0046 -0.0072 -0.0057 9640.3318 -0.0080 -0.0059 0.0049 0.0075 0.0076 9640.5258 0.0015 -0.0026 -0.0047 -0.0061 -0.0053 9641.3259 0.0092 0.0068 -0.0037 -0.0060 -0.0064 9641.5354 0.0177 0.0137 -0.0068 -0.0085 -0.0043 9642.3274 -0.0054 -0.0028 0.0016 0.0043 0.0019 9642.5316 0.0021 -0.0015 -0.0069 -0.0108 -0.0086 9643.3256 0.0149 0.0119 -0.0034 -0.0035 -0.0051 9643.5414 0.0106 0.0056 -0.0052 -0.0070 -0.0071 9658.3311 -0.0035 0.0006 -0.0019 -0.0035 -0.0038 9658.5478 -0.0058 -0.0032 0.0027 0.0048 0.0006 9660.3228 -0.0139 -0.0089 -0.0076 -0.0055 -0.0075 9662.4019 -0.0127 -0.0062 -0.0011 0.0005 0.0000 9663.3138 -0.0046 -0.0053 0.0052 0.0107 0.0112 9663.5307 -0.0143 -0.0095 0.0089 0.0158 0.0140 9664.3157 -0.0143 -0.0046 0.0008 0.0007 -0.0026 9664.4716 -0.0119 -0.0051 -0.0010 0.0035 0.0004 9690.3213 0.0058 0.0035 -0.0058 -0.0038 -0.0020 9691.3378 0.0022 -0.0014 -0.0040 -0.0072 -0.0044 9691.4273 -0.0080 -0.0052 -0.0038 -0.0035 -0.0053 9693.3669 0.0028 -0.0005 0.0108 9694.3363 -0.0004 -0.0036 0.0036 0.0129 0.0167 9697.3372 -0.0147 -0.0124 -0.0090 9698.3401 -0.0066 -0.0068 0.0077 0.0121 0.0146 9701.3310 -0.0159 -0.0079 -0.0002 0.0008 -0.0024 9702.3415 -0.0096 -0.0085 0.0093 0.0142 0.0143 9704.3281 -0.0147 -0.0105 0.0123 0.0177 0.0172 9705.3311 -0.0047 -0.0049 0.0027 0.0057 0.0013