This file contains extinction data as determined by the CARLSBERG MERIDIAN TELESCOPE (CMT) on the island of La Palma in the Canary Islands. The nightly values are derived from CCD frames in the SDSS r' band. Each frame contains an average of 30 - 40 photometric standard stars. Explanation of data columns: (1) Evening date ie. date before midnight. (2) Version number of data. If 0 then unchecked. (3) Extinction in r'. This is the median value of the extinction from all photometric frames. : indicates an uncertain value due to the night probably not being photometric. (4) Standard error on (3) = Scatter/sqrt(N_frames) (5) Scatter (robust estimate of the Gaussian sigma based on percentiles of the distribution). If this value is high (0.060), then the night was probably not photometric. (6) Number of photometric frames (7) Number of hours of photometric data taken. (8) Number of hours of non-photometric data taken. (9) Comment Evening Ext Error Scat Nf Phot Non-Phot Comment Date r' (1) (2) (3) (4) (5) (6) (7) (8) (9) 030101 1 0.241: 0.069 0.182 7 8.53 2.95 030102 1 0.215: 0.044 0.098 5 6.12 5.51 030103 1 0.106 0.005 0.017 11 11.39 0.00 030104 1 0.106 0.008 0.021 7 10.40 1.01 Some cloud 030105 1 0.116 0.010 0.023 5 8.65 0.00 Rain later 030106 1 0.115 0.005 0.015 8 11.02 0.28 030107 1 0.117 0.008 0.023 9 10.66 0.74 030108 0 0.00 0.00 Hardware problems 030109 1 0.255: 0.050 0.133 7 9.04 0.32 Some high humidity 030110 2 4.29 4.45 Some high humidity 030111 0 0.00 0.00 Rain 030112 0 0.00 0.00 Rain 030113 0 0.00 0.00 Rain 030114 0 0.00 0.00 Rain and ice 030115 0 0.00 0.00 Ice 030116 1 0.085 0.004 0.014 11 11.21 0.00 030117 1 0.085 0.007 0.022 9 11.36 0.00 030118 0 0.00 1.19 Mostly cloudy and rain 030119 1 0.106: 0.011 0.022 4 4.86 6.45 Mostly cloudy 030120 1 0.107 0.011 0.037 11 11.21 0.00 Some cloud 030121 1 0.105: 0.035 0.078 5 5.93 3.60 Rain at end 030122 1 0.119 0.008 0.026 10 11.22 0.00 Some thin cloud 030123 1 0.094 0.006 0.020 12 11.07 0.00 030124 1 0.270: 0.073 0.252 12 11.05 0.00 030125 1 0.525: 0.028 0.056 4 3.51 7.39 Mostly cloudy 030126 1 0.099: 0.031 0.087 8 7.67 3.57 Thin cloud at end 030127 0 0.00 11.04 030128 1 0.091 0.008 0.029 13 10.50 0.28 030129 0 0.00 0.00 Rain 030130 0 0.00 0.77 Rain + cloud 030131 0 0.00 0.00 Freezing rain 030201 0 0.00 0.00 Ice 030202 0 0.00 0.00 Hardware problem 030203 0 0.00 0.00 Hardware problem 030204 0 0.00 0.00 Hardware problem 030205 1 0.089 0.015 0.039 7 3.77 0.90 Cloud at start 030206 1 0.079 0.020 0.044 5 5.46 2.37 Some rain 030207 0 0.00 0.00 Rain and high humidity 030208 1 0.108 0.006 0.017 9 5.71 0.62 Observed second half 030209 1 0.092 0.004 0.013 10 10.67 0.00 030210 1 0.091 0.005 0.019 13 10.59 0.00 030211 1 0.091 0.005 0.017 14 10.59 0.00 030212 1 0.310: 0.034 0.101 9 7.60 2.95 Patchy cloud 030213 1 0.107 0.006 0.012 4 4.67 0.00 Clear at first 030214 1 0.094 0.007 0.022 9 6.73 0.28 Rain at start 030215 1 0.093 0.007 0.027 17 10.35 0.00 030216 1 0.097 0.007 0.023 10 10.35 0.31 030217 1 0.104 0.009 0.029 10 10.21 0.43 030218 1 0.119: 0.000 0.001 2 5.79 0.58 Rain later 030219 0 0.00 0.00 030220 1 0.118: 0.031 0.063 4 3.43 0.00 Some rain 030221 1 0.100 0.004 0.015 13 9.96 0.00 030222 1 0.115 0.018 0.053 9 7.35 2.95 Some cloud 030223 0 0.00 0.00 Rain 030224 1 1.29 1.63 Clear at first 030225 1 0.094 0.008 0.022 7 7.74 0.27 Rain at first 030226 1 0.096 0.004 0.016 13 9.04 0.86 030227 1 0.097 0.004 0.015 14 9.75 0.28 030228 1 0.092 0.004 0.013 11 9.75 0.38 030301 1 0.122 0.009 0.029 10 9.05 1.28 030302 1 0.095 0.004 0.016 14 9.97 0.00 030303 1 0.095 0.005 0.019 14 9.77 0.27 030304 1 0.119 0.017 0.044 7 6.37 3.83 Clouds at end 030305 1 0.082 0.012 0.034 8 6.42 3.74 Clouds at start 030306 1 0.088: 0.229 0.397 3 2.17 7.97 Thin cloud 030307 1 0.28 9.82 Half cloudy 030308 1 0.101 0.003 0.010 11 9.95 0.00 030309 1 0.092 0.007 0.025 12 8.64 1.33 Some cloud 030310 1 0.123 0.016 0.057 12 8.52 1.36 030311 1 0.114 0.003 0.009 10 9.02 0.85 Rain at end 030312 0 0.00 0.00 Frezing rain 030313 2 1.29 8.52 Mostly cloudy 030314 0 0.00 9.88 Mostly cloudy 030315 0 0.00 0.00 Rain 030316 1 0.115: 0.009 0.012 2 1.37 0.59 Clear at first 030317 1 0.104 0.008 0.028 13 8.58 0.91 030318 1 0.118 0.012 0.045 13 8.86 0.78 Some cloud 030319 1 0.111 0.009 0.019 4 2.52 1.50 Clear at first 030320 0 0.00 0.00 Rain 030321 0 0.00 0.00 Rain and ice 030322 1 0.127: 0.012 0.030 6 4.67 4.79 Cloud at end 030323 0 0.00 0.00 Rain 030324 0 0.00 1.87 Mostly rain 030325 2 0.46 4.93 Cloud 030326 1 0.130 0.012 0.046 15 9.14 0.00 030327 1 0.104 0.015 0.040 7 2.90 0.58 Cloud in middle 030328 1 0.125 0.010 0.034 12 6.39 2.90 Cloud at end 030329 1 0.131: 0.072 0.177 6 2.82 6.58 Cloud at end 030330 1 0.319: 0.116 0.201 3 1.80 7.53 Cloud first half 030331 1 0.103: 0.033 0.110 11 7.36 1.86 030401 1 0.392: 0.061 0.149 6 2.63 6.50 Thin cloud 030402 1 0.166: 0.132 0.295 5 4.95 4.30 Clouds at start 030403 1 0.197: 0.042 0.093 5 2.45 1.35 High humidity at end 030404 1 0.093 0.006 0.019 9 3.81 0.33 High humidity at end 030405 0 0.00 0.00 High humidity 030406 0 0.00 0.00 Rain 030407 0 0.00 0.00 Rain and high humidity 030408 1 0.094 0.009 0.019 4 4.76 0.00 Clear second half 030409 1 0.076 0.004 0.012 10 8.85 0.28 030410 1 0.089 0.004 0.014 11 9.13 0.00 030411 1 0.091: 0.037 0.099 7 8.63 0.40 030412 0 0.00 0.00 Rain and high wind 030413 1 0.075: 0.013 0.023 3 1.44 1.95 Clear first half 030414 1 0.081 0.004 0.015 13 8.59 0.29 A few clouds 030415 1 0.071 0.006 0.021 12 8.95 0.00 030416 1 0.073 0.014 0.038 7 6.33 2.66 Some cloud 030417 1 0.132 0.023 0.052 5 5.97 1.44 Cloud and rain later 030418 1 0.125: 0.027 0.066 6 2.18 6.60 Cloudy in middle 030419 1 0.092 0.011 0.036 10 5.34 0.42 A little rain 030420 0 0.00 0.00 Rain 030421 1 0.103 0.010 0.020 4 1.81 1.29 Rain later 030422 1 0.103 0.006 0.020 12 8.35 0.28 030423 2 1.50 7.24 Cloud half the night 030424 1 0.115: 0.014 0.034 6 3.82 4.92 Some cloud at end 030425 1 0.102 0.008 0.025 9 8.30 0.28 030426 1 0.092 0.012 0.024 4 8.84 0.00 030427 1 0.096 0.013 0.026 4 4.50 0.00 030428 1 0.091 0.005 0.012 5 8.91 0.00 030429 0 0.00 0.00 Rain and high humidity 030430 0 0.00 7.54 Mostly cloudy 030501 1 0.093 0.011 0.032 9 8.64 0.00 030502 1 0.068 0.007 0.018 7 8.37 0.30 030503 1 0.107: 0.010 0.020 4 2.86 5.74 Some cloud 030504 1 2.42 0.00 Rain later 030505 1 0.068 0.009 0.024 7 8.42 0.00 030506 1 0.059 0.008 0.023 8 8.54 0.00 030507 1 0.070 0.008 0.022 8 8.51 0.00 030508 2 2.97 5.55 Cloud most of night 030509 1 0.161 0.007 0.017 7 7.85 0.45 030510 1 0.084 0.011 0.033 9 8.38 0.00 030511 1 0.062 0.006 0.019 9 8.17 0.00 030512 1 0.078 0.008 0.019 5 8.39 0.00 030513 1 0.063 0.007 0.018 7 8.25 0.00 030514 1 0.083: 0.017 0.029 3 3.93 4.34 Some cloud 030515 1 0.159 0.007 0.015 4 7.38 0.69 Patchy cloud 030516 1 0.086 0.006 0.016 7 6.75 1.34 Some haze 030517 1 0.086 0.005 0.017 10 8.14 0.00 030518 1 0.082 0.008 0.020 6 5.23 0.00 030519 1 0.188: 0.071 0.173 6 7.98 0.29 030520 1 0.092: 0.007 0.016 5 3.20 5.00 Cloud second half 030521 1 0.197 0.019 0.046 6 8.08 0.00 030522 1 0.234 0.022 0.054 6 7.89 0.29 030523 1 0.383 0.016 0.044 8 7.86 0.02 030524 1 0.215 0.020 0.054 7 7.06 0.00 030525 1 0.115 0.011 0.027 6 6.98 0.00 030526 1 0.099 0.005 0.013 6 8.16 0.00 030527 2 0.33 6.74 030528 1 0.134 0.020 0.041 4 6.69 0.66 030529 1 0.103 0.005 0.012 5 7.30 0.29 030530 1 0.100 0.010 0.020 4 7.51 0.48 030531 1 0.111 0.007 0.014 4 5.14 2.99 030601 1 0.088 0.005 0.011 5 8.04 0.00 030602 1 0.097 0.006 0.010 3 5.73 2.43 030603 1 0.116 0.012 0.026 5 8.10 0.00 030604 1 0.102 0.008 0.016 4 8.15 0.00 030605 1 0.092 0.005 0.009 3 8.18 0.00 030606 1 0.096: 0.002 0.002 2 5.07 0.08 030607 1 0.128 0.007 0.015 5 8.07 0.00 030608 1 0.108 0.007 0.016 5 8.06 0.00 030609 1 0.100 0.008 0.020 6 7.86 0.00 030610 1 0.086 0.006 0.017 8 7.85 0.00 030611 1 0.114: 0.026 0.065 6 3.12 4.65 Cloud last half 030612 1 0.101 0.006 0.016 7 7.50 0.37 030613 1 0.095 0.006 0.015 7 7.27 0.53 030614 1 0.097 0.003 0.009 10 7.59 0.00 030615 1 0.079 0.005 0.017 12 7.66 0.00 030616 1 0.089 0.008 0.020 7 7.56 0.29 030617 1 0.084 0.004 0.011 7 7.87 0.00 030618 1 0.087 0.003 0.008 7 7.84 0.00 030619 1 0.083 0.007 0.019 7 7.89 0.00 030620 0 0.00 0.00 Hardware problem 030621 1 0.088 0.003 0.008 8 7.44 0.34 030622 1 0.099 0.004 0.013 9 7.78 0.00 030623 1 0.101 0.005 0.014 7 7.54 0.29 030624 1 0.92 6.94 Clouds all night 030625 1 0.110 0.005 0.014 9 7.59 0.00 030626 1 0.107 0.004 0.012 10 7.55 0.00 030627 1 0.085 0.004 0.011 8 7.82 0.00 030628 1 0.086 0.008 0.026 11 7.25 0.38 030629 1 0.332: 0.022 0.071 10 7.56 0.00 030630 1 0.207: 0.005 0.009 3 2.74 4.90 030701 1 1.73 5.99 Hardware problem 030702 1 0.123 0.006 0.020 11 7.20 0.47 030703 1 0.076 0.005 0.013 8 6.76 1.01 030704 1 0.072 0.009 0.029 11 7.46 0.07 030705 1 0.084 0.004 0.016 13 7.30 0.28 030706 1 0.080 0.008 0.023 9 6.43 1.27 Some cloud 030707 1 0.237 0.012 0.035 9 7.04 0.74 030708 1 0.122 0.006 0.022 13 7.67 0.00 030709 1 0.077 0.004 0.011 9 7.93 0.00 030710 1 0.672: 0.004 0.008 3 3.68 4.21 Half cloudy 030711 2 0.77 6.75 Cloudy 030712 1 0.442: 0.012 0.023 4 2.00 5.58 Cloudy 030713 1 0.100 0.013 0.057 18 6.99 0.47 030714 1 0.084 0.005 0.017 13 7.25 0.51 030715 1 0.097 0.006 0.024 14 7.16 0.37 030716 1 0.089 0.003 0.009 8 7.32 0.70 030717 1 0.266: 0.025 0.078 10 6.81 1.13 030718 1 0.373: 0.046 0.122 7 4.53 3.31 Cloudy 030719 1 0.959: 0.113 0.160 2 0.97 6.71 Cloudy 030720 1 0.495: 0.046 0.137 9 5.13 2.62 Some cloud 030721 1 0.422 0.007 0.021 9 5.89 2.06 Some cloud 030722 1 0.430 0.014 0.044 10 7.50 0.55 030723 1 0.323 0.008 0.027 10 7.42 0.59 030724 1 0.254 0.005 0.015 10 7.82 0.29 030725 1 0.100 0.003 0.008 8 7.35 0.81 030726 1 0.121 0.006 0.019 10 7.63 0.38 030727 1 0.109 0.004 0.015 11 7.77 0.29 030728 1 0.088 0.004 0.012 11 8.17 0.00 030729 1 0.094 0.004 0.014 10 8.25 0.00 030730 1 0.102 0.006 0.020 11 8.22 0.00 030731 0 0.00 0.00 030801 1 0.132 0.005 0.015 10 8.27 0.00 030802 1 0.195 0.012 0.046 14 8.13 0.00 030803 1 0.128 0.013 0.049 15 8.11 0.00 030804 1 0.110 0.007 0.024 11 8.33 0.00 030805 1 0.104 0.005 0.017 12 8.31 0.00 030806 1 0.330 0.013 0.045 13 7.94 0.28 030807 1 0.308 0.009 0.030 12 8.11 0.20 030808 1 0.256 0.008 0.022 8 7.78 0.60 030809 1 0.103 0.005 0.019 13 8.15 0.06 030810 0 0.00 0.00 Thin cloud 030811 0 0.00 0.00 Hardware problem 030812 0 0.00 0.00 Mostly cloudy 030813 0 0.00 0.00 Hardware problems 030814 0 0.00 0.00 Hardware problems 030815 0 0.00 0.00 Hardware problems 030816 0 0.00 0.00 Hardware problems 030817 0 0.00 0.00 Hardware problems 030818 0 0.00 0.00 Hardware problems 030819 0 0.00 7.87 Hardware problems 030820 1 0.093 0.007 0.021 8 8.94 0.00 030821 1 0.080 0.003 0.010 9 8.72 0.01 030822 1 0.098 0.004 0.011 8 8.12 0.61 030823 1 0.100 0.006 0.020 12 7.16 1.35 030824 1 0.103 0.003 0.011 10 8.25 0.62 030825 1 0.086 0.005 0.017 12 8.93 0.00 030826 1 0.096 0.006 0.018 10 8.70 0.29 030827 1 0.091 0.005 0.018 12 7.45 0.88 030828 1 0.085 0.003 0.008 9 9.13 0.00 030829 1 0.080 0.004 0.015 12 9.02 0.00 030830 1 0.092 0.003 0.009 10 8.32 0.63 030831 1 0.67 8.41 Some cloud 030901 1 0.300 0.006 0.018 8 4.73 4.40 Cloud at end 030902 1 0.570: 0.020 0.029 2 3.03 6.19 Some cloud 030903 1 0.384: 0.033 0.100 9 8.97 0.30 030904 1 0.083 0.003 0.010 10 9.28 0.00 030905 1 0.075 0.006 0.018 10 9.33 0.00 030906 1 0.089 0.005 0.017 13 9.20 0.00 030907 1 0.084 0.004 0.016 13 9.25 0.00 030908 1 0.341: 0.013 0.028 5 3.27 5.77 Some cloud 030909 1 0.268: 0.030 0.068 5 3.52 5.87 Some cloud 030910 0 0.00 9.30 Some cloud 030911 1 0.202: 0.023 0.046 4 2.86 6.63 Some cloud 030912 1 0.124: 0.042 0.094 5 2.91 6.49 Some cloud 030913 1 0.275: 0.052 0.173 11 9.44 0.00 030914 1 0.163 0.013 0.046 12 9.47 0.00 030915 1 0.105 0.006 0.020 12 9.48 0.00 030916 1 0.090 0.005 0.019 13 9.48 0.00 030917 1 0.102 0.008 0.024 10 9.17 0.43 030918 1 0.109 0.008 0.026 11 9.12 0.50 030919 1 0.090 0.009 0.032 13 8.92 0.44 030920 1 0.115 0.018 0.045 6 5.12 4.34 Cloud at end 030921 1 0.103 0.007 0.019 8 7.02 2.78 030922 1 0.098: 0.040 0.119 9 6.76 2.69 Cloud at first 030923 1 0.097 0.011 0.040 14 9.61 0.00 030924 1 0.178: 0.020 0.063 10 6.09 3.58 Cloud at first 030925 1 0.230: 0.017 0.063 14 9.37 0.10 030926 1 0.162 0.006 0.025 15 9.67 0.00 030927 1 0.116 0.007 0.024 13 8.77 0.94 030928 1 0.137 0.011 0.043 14 9.33 0.42 030929 1 0.234: 0.024 0.075 10 10.04 0.00 030930 1 0.213: 0.012 0.027 5 2.46 4.91 Cloudy at start 031001 1 0.317: 0.068 0.136 4 1.75 8.23 Mostly cloudy 031002 1 0.54 0.32 Mostly rain 031003 1 0.27 7.17 Rain and cloud 031004 0 0.00 0.00 Rain 031005 0 0.00 0.00 Rain 031006 0 0.00 0.00 Rain 031007 0 0.00 0.07 Rain 031008 1 0.096 0.019 0.049 7 8.30 1.54 Rain at start 031009 0 0.00 7.06 Rain at end 031010 2 0.72 0.09 Mostly cloudy 031011 1 0.074: 0.014 0.039 8 4.94 5.32 Half cloudy 031012 1 0.094 0.011 0.036 11 9.96 0.14 031013 1 0.109: 0.031 0.082 7 4.79 5.51 031014 1 0.121 0.007 0.016 5 5.83 4.40 031015 0 0.088 0.006 0.021 12 10.34 0.00 031016 0 0.095 0.007 0.018 6 7.89 0.04 031017 0 0.092 0.016 0.048 9 8.57 1.73 031018 0 0.093 0.004 0.014 12 10.45 0.00 031019 0 0.095 0.004 0.015 13 9.97 0.28 031020 0 0.00 0.00 Rain 031021 0 0.00 0.00 Rain 031022 0 0.00 0.00 Rain 031023 0 0.00 0.00 Rain 031024 1 0.41 0.09 Mostly rain 031025 1 0.98 0.00 Mostly rain 031026 0 0.00 7.90 Cloudy 031027 0 0.00 5.68 Cloud and rain later 031028 0 0.135: 0.029 0.071 6 4.95 5.43 Cloudy 031029 1 0.29 10.34 Thin cloud 031030 0 0.084 0.004 0.017 14 10.64 0.00 031031 0 0.083 0.019 0.042 5 3.35 0.00 High humidity later 031101 0 0.082 0.002 0.009 15 10.31 0.29 031102 0 0.083 0.011 0.024 5 1.49 0.93 Some high humidity 031103 0 0.098 0.015 0.055 14 9.88 0.13 031104 0 0.088 0.004 0.014 12 10.56 0.28 031105 0 0.00 0.00 Hardware problem 031106 0 0.00 0.00 Hardware problem 031107 0 0.075: 0.015 0.034 5 4.95 5.94 Clouds later 031108 0 0.080 0.004 0.012 10 11.07 0.00 031109 0 0.084 0.005 0.017 13 7.71 0.31 High humidity at times 031110 0 0.079 0.007 0.026 13 10.61 0.27 031111 0 0.073 0.002 0.006 14 10.92 0.00 031112 0 0.075 0.004 0.014 14 10.96 0.00 031113 0 0.073 0.003 0.014 16 10.81 0.00 031114 0 0.090 0.012 0.040 11 6.02 4.91 Patchy cloud later 031115 0 0.074 0.004 0.014 14 10.67 0.28 031116 0 0.080 0.004 0.017 17 10.85 0.00 031117 0 0.083 0.005 0.019 14 11.03 0.00 031118 0 0.080 0.004 0.013 14 11.07 0.00 031119 0 0.00 0.00 031120 0 0.00 0.00 031121 0 0.00 0.00 031122 0 0.00 0.00 031123 0 0.00 0.00 031124 1 2.01 0.54 031125 0 0.083 0.004 0.014 10 11.19 0.00 031126 0 0.101 0.014 0.040 8 8.47 2.91 031127 0 0.089 0.004 0.011 6 11.46 0.00 031128 0 0.097 0.004 0.009 6 11.64 0.00 031129 0 0.084 0.002 0.006 6 11.62 0.00 031130 0 0.087 0.004 0.010 8 11.54 0.00 031201 0 0.00 0.00 031202 0 0.124: 0.056 0.137 6 2.85 0.00 031203 0 0.085 0.004 0.011 7 8.81 0.00 031204 0 0.00 0.00 031205 0 0.079 0.002 0.005 6 5.17 0.00 031206 0 0.084 0.004 0.008 3 6.32 5.34 031207 0 0.074 0.007 0.017 7 10.61 0.00 031208 0 0.125 0.016 0.036 5 8.13 3.53 031209 1 0.74 1.47 031210 1 0.32 11.19 031211 1 2.33 9.36 031212 0 0.116 0.009 0.022 6 9.36 0.08 031213 0 0.082 0.014 0.024 3 6.56 5.18 031214 0 0.080 0.004 0.010 7 11.71 0.00 031215 0 0.086 0.008 0.020 6 11.63 0.00 031216 0 0.081 0.002 0.004 5 11.82 0.00 031217 0 0.086 0.010 0.022 5 11.10 0.52 031218 0 0.00 11.55 031219 0 0.00 10.80 031220 1 0.73 6.06 031221 2 3.20 8.12 031221 0 0.159: 0.038 0.054 2 3.20 8.12 031222 2 3.10 7.84 031222 0 0.186: 0.030 0.042 2 3.10 7.84 031223 0 0.00 0.00 031224 1 0.57 8.70 031225 0 0.00 11.51 031226 0 0.00 9.56 031227 0 0.124 0.014 0.028 4 7.92 3.83 031228 0 0.069 0.004 0.012 7 11.59 0.00 031229 0 0.152: 0.022 0.061 8 11.51 0.00 031230 0 0.252: 0.036 0.072 4 3.45 8.11 031231 0 0.073 0.010 0.028 8 8.75 0.15