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) 010101 0 0.00 0.00 Seals problem 010102 0 0.00 0.00 Seals problem 010103 0 0.00 0.00 Seals problem 010104 0 0.00 0.00 Seals problem 010105 0 0.00 0.00 Seals problem 010106 0 0.00 0.00 Seals problem 010107 0 0.00 0.00 Seals problem 010108 0 0.00 0.00 Seals problem 010109 0 0.00 0.00 Seals problem 010110 1 0.089 0.010 0.036 13 4.81 0.15 010111 1 0.085 0.004 0.020 21 10.37 0.41 010112 1 0.090 0.004 0.016 21 10.40 0.35 010113 1 0.102 0.012 0.050 18 9.57 1.28 010114 1 0.092 0.004 0.019 22 9.93 0.67 010115 1 0.086 0.003 0.014 20 9.62 0.37 010116 1 0.082 0.006 0.022 13 6.02 0.00 010117 1 0.086 0.005 0.023 23 10.16 0.35 010118 1 0.082 0.003 0.016 22 10.65 0.00 010119 1 0.088 0.006 0.027 24 10.56 0.00 010120 1 0.079 0.005 0.021 20 8.66 1.61 010121 1 0.095 0.005 0.015 9 4.33 1.17 010122 1 0.098 0.005 0.021 19 10.15 0.61 010123 1 0.089 0.004 0.019 18 9.84 0.69 010124 1 0.081 0.005 0.021 19 9.24 1.19 010125 1 0.094 0.007 0.034 21 10.58 0.00 010126 1 0.098 0.004 0.018 24 10.08 0.35 010127 1 0.073 0.005 0.021 19 9.85 0.73 010128 1 0.086 0.003 0.015 23 9.50 0.90 010129 1 0.090 0.005 0.024 24 9.95 0.42 010130 1 0.079 0.002 0.011 22 10.55 0.00 010131 1 0.094 0.003 0.016 21 9.79 0.65 010201 1 0.083 0.005 0.023 24 10.28 0.00 010202 1 0.110 0.010 0.044 18 7.54 2.77 010203 1 0.078 0.004 0.019 24 10.12 0.00 010204 1 0.087 0.005 0.022 23 9.44 0.75 010205 1 0.096: 0.008 0.025 11 4.99 5.28 010206 1 0.066: 0.047 0.093 4 2.10 2.19 Mostly cloud+rain 010207 1 0.082 0.010 0.040 16 7.66 2.60 010208 1 0.066 0.007 0.031 18 7.27 2.59 010209 1 0.082 0.004 0.019 22 9.63 0.31 010210 1 0.080 0.005 0.023 23 9.94 0.07 010211 1 0.108 0.008 0.039 24 10.10 0.00 010212 1 0.086 0.006 0.023 17 7.54 2.64 010213 1 0.114 0.015 0.054 13 5.69 4.31 010214 1 0.224: 0.070 0.186 7 2.80 7.40 Thin cloud most of night 010215 1 0.124 0.004 0.022 31 9.02 0.56 010216 1 0.113 0.005 0.022 20 9.08 1.02 010217 0 0.00 9.83 Cloud 010218 1 0.105 0.004 0.016 21 9.43 0.61 010219 1 0.164 0.010 0.039 15 7.12 3.05 010220 1 0.150: 0.018 0.060 11 4.94 5.06 Some cloud 010221 1 0.109 0.005 0.022 22 9.56 0.33 010222 1 0.121 0.007 0.032 20 9.26 0.73 010223 0 0.00 0.00 No obs. Software problem 010224 1 0.102 0.006 0.025 17 7.13 0.66 010225 1 0.106: 0.012 0.021 3 1.45 5.12 Cloud+rain later 010226 1 0.138 0.007 0.027 14 5.31 1.46 010227 1 0.429: 0.043 0.122 8 3.43 6.28 Patchy cloud 010228 1 0.199: 0.008 0.027 11 4.42 5.39 Thin cloud 010301 0 0.00 0.00 Rain 010302 0 0.00 0.00 Rain 010303 1 0.74 0.57 Rain. Clear. Rain 010304 0 0.00 0.00 Rain 010305 0 0.00 0.00 Rain 010306 1 0.096: 0.070 0.172 6 2.46 0.99 Rain - then clearing 010307 1 0.093 0.009 0.039 18 7.59 1.93 Thin cloud 010308 1 0.091 0.004 0.018 18 7.98 1.59 010309 1 0.080 0.005 0.020 17 7.23 2.33 010310 1 0.088 0.005 0.025 21 9.53 0.00 010311 1 0.096 0.006 0.026 19 8.30 0.58 010312 0 0.00 0.00 Rain 010313 1 0.135 0.009 0.040 20 9.04 0.48 010314 1 0.133 0.004 0.019 18 9.68 0.00 010315 1 0.102 0.007 0.013 3 10.35 0.00 010316 1 0.101 0.005 0.008 3 10.33 0.00 010317 1 0.125: 0.002 0.002 2 6.68 3.42 010318 1 0.109 0.005 0.009 3 10.26 0.00 010319 1 0.110 0.007 0.013 3 10.24 0.00 010320 1 0.139: 0.067 0.134 4 10.01 0.00 010321 1 0.093 0.000 0.001 3 10.13 0.00 010322 1 0.104 0.008 0.014 3 10.07 0.00 010323 1 0.100 0.014 0.024 3 10.08 0.00 010324 1 0.083 0.010 0.022 5 9.79 0.00 010325 1 0.092 0.004 0.007 4 9.40 0.38 010326 1 2.75 6.93 Some cloud 010327 0 0.00 0.00 Rain 010328 0 0.00 0.00 Seals problem 010329 1 0.095 0.003 0.004 3 9.89 0.00 010330 1 0.094 0.006 0.012 4 9.81 0.00 010331 1 0.106 0.004 0.006 3 5.81 3.92 010401 1 0.096 0.005 0.016 8 9.33 0.00 010402 1 0.103 0.004 0.007 3 5.27 2.91 Rain at start 010403 1 0.107 0.014 0.036 7 9.41 0.00 010404 1 0.102 0.006 0.015 7 9.34 0.00 010405 1 0.088 0.006 0.015 7 9.07 0.15 010406 1 0.124 0.003 0.006 3 5.44 3.85 Some cloud 010407 1 0.089 0.008 0.017 4 6.32 2.93 Some cloud 010408 1 0.098 0.009 0.021 5 9.48 0.00 010409 1 0.088 0.009 0.019 5 9.45 0.00 010410 1 0.089 0.010 0.027 7 9.29 0.00 010411 0 0.00 0.00 010412 1 0.095 0.007 0.018 6 8.94 0.31 Some cloud 010413 1 0.109 0.006 0.011 4 8.12 1.16 Some cloud 010414 1 0.112 0.018 0.036 4 9.35 0.00 010415 1 3.00 6.31 Occasional cloud 010416 1 0.090: 0.003 0.004 2 4.54 4.70 Occasional cloud 010417 1 0.112 0.013 0.026 4 8.16 0.28 Rain at end of night 010418 0 0.00 0.00 Rain, ice and snow 010419 0 0.00 0.00 Rain, ice and snow 010420 0 0.00 0.00 Rain 010421 0 0.00 0.00 Rain and ice 010422 1 0.088 0.008 0.022 7 8.78 0.00 010423 0 0.00 8.85 Thin cloud all night 010424 1 0.096: 0.005 0.009 3 3.27 5.56 Cloud at start 010425 1 0.109 0.008 0.023 8 5.55 2.67 Rain at start 010426 1 0.103 0.005 0.016 9 8.67 0.00 010427 1 0.119: 0.150 0.335 5 3.84 4.70 Some thin cloud 010428 1 0.093 0.005 0.018 13 8.31 0.00 010429 1 0.098 0.004 0.015 14 7.89 0.00 Some rain 010430 1 0.087 0.004 0.014 15 8.26 0.00 010501 1 0.100: 0.035 0.085 6 2.04 0.09 Rain most of the night 010502 1 0.094 0.003 0.011 17 7.77 0.27 010503 1 0.113 0.009 0.036 15 4.96 3.03 Occasional cloud 010504 1 0.121 0.003 0.013 14 7.58 0.56 010505 1 0.131: 0.010 0.017 3 0.91 7.42 010506 1 0.096: 0.009 0.015 3 2.41 5.77 Mostly cloudy 010507 0 0.00 0.00 No observing. Network problems 010508 1 0.110 0.004 0.014 11 6.04 0.60 Some cloud 010509 1 0.089 0.007 0.026 15 8.04 0.00 010510 1 0.115 0.005 0.020 18 7.79 0.00 010511 1 0.222: 0.023 0.091 16 6.55 0.00 010512 1 0.096 0.004 0.015 13 7.32 0.47 010513 1 0.101 0.006 0.022 14 7.02 0.85 010514 1 0.134: 0.021 0.060 8 3.12 4.64 010515 0 0.00 7.72 Thin cloud 010516 1 0.111 0.008 0.030 13 4.73 1.97 010517 1 0.082 0.008 0.028 12 6.20 0.57 010518 1 0.264: 0.111 0.273 6 3.70 3.92 010519 1 0.080 0.007 0.023 12 6.38 1.44 010520 1 0.078 0.009 0.033 15 7.78 0.00 010521 1 0.113 0.007 0.026 12 7.67 0.21 010522 1 0.097 0.007 0.025 12 7.25 0.60 010523 1 0.104 0.008 0.026 11 7.50 0.39 010524 1 0.089 0.014 0.045 11 7.92 0.00 010525 1 0.087 0.007 0.021 9 6.95 0.95 010526 1 0.082 0.006 0.019 9 8.00 0.00 010527 1 0.090 0.004 0.011 6 7.81 0.05 010528 1 0.087 0.004 0.011 7 8.06 0.00 010529 1 0.117 0.004 0.009 5 8.14 0.00 010530 1 0.213 0.009 0.015 3 4.69 0.00 010531 1 0.081 0.006 0.018 8 7.85 0.00 010601 1 0.150 0.009 0.019 5 7.77 0.29 010602 1 0.272: 0.066 0.115 3 5.39 2.70 010603 1 0.305: 0.025 0.062 6 7.89 0.00 010604 1 0.141: 0.030 0.067 5 8.07 0.00 010605 1 0.074 0.004 0.011 6 7.82 0.00 010606 1 0.074 0.005 0.011 5 8.03 0.00 010607 1 0.060 0.004 0.009 5 8.02 0.00 010608 1 0.118 0.004 0.011 6 7.70 0.00 010609 1 0.118 0.007 0.015 5 7.76 0.00 010610 1 0.109 0.005 0.011 5 5.04 0.00 010611 1 0.119 0.005 0.011 5 7.55 0.26 010612 1 0.107 0.005 0.010 5 4.57 0.00 010613 1 1.93 0.00 Telescope service 010614 1 0.123 0.003 0.007 6 7.73 0.00 010615 1 0.104 0.003 0.008 5 8.00 0.00 010616 1 0.095 0.008 0.015 4 8.04 0.00 010617 1 0.100 0.009 0.021 5 7.99 0.00 010618 1 0.106 0.006 0.016 6 7.92 0.00 010619 1 0.097 0.014 0.028 4 7.55 0.25 010620 1 0.091 0.010 0.021 5 7.98 0.00 010621 1 0.091 0.008 0.018 5 7.97 0.00 010622 1 0.094 0.005 0.010 4 8.02 0.00 010623 0 0.00 0.00 Network problems 010624 1 0.092 0.006 0.012 4 7.87 0.00 010625 1 0.214 0.008 0.020 6 7.95 0.00 010626 1 0.090 0.009 0.021 6 7.93 0.00 010627 1 0.100 0.005 0.013 6 7.77 0.00 010628 1 0.075 0.007 0.017 6 7.95 0.00 010629 1 0.087 0.010 0.024 6 7.94 0.00 010630 1 0.146 0.016 0.041 7 7.92 0.00 010701 1 0.398 0.012 0.029 6 7.97 0.00 010702 1 0.336 0.008 0.018 5 8.02 0.00 010703 1 0.085 0.008 0.021 6 7.98 0.00 010704 1 0.092 0.008 0.021 7 7.75 0.00 010705 1 0.110 0.009 0.019 5 8.06 0.00 010706 1 0.092 0.007 0.015 5 8.06 0.00 010707 1 0.092 0.005 0.013 6 8.03 0.00 010708 1 0.094 0.007 0.017 6 8.04 0.00 010709 1 0.097 0.004 0.008 5 7.92 0.00 010710 1 0.095 0.005 0.010 4 8.18 0.00 010711 1 0.094 0.003 0.007 4 8.17 0.00 010712 1 0.214 0.014 0.027 4 8.20 0.00 010713 1 0.339 0.011 0.025 5 8.18 0.00 010714 1 0.293 0.007 0.015 5 6.15 0.00 010715 1 0.100 0.004 0.011 6 8.15 0.00 010716 1 0.093 0.010 0.024 6 8.18 0.00 010717 1 0.498: 0.013 0.026 4 3.68 4.57 010718 0 0.00 0.00 Network problems 010719 1 0.098 0.004 0.009 5 8.29 0.00 010720 1 0.091 0.004 0.009 6 8.25 0.00 010721 1 0.111 0.001 0.001 4 8.37 0.00 010722 1 0.092 0.003 0.007 5 8.18 0.00 010723 1 0.286 0.011 0.022 4 8.43 0.00 010724 1 0.418: 0.048 0.096 4 8.45 0.00 010725 1 0.616 0.013 0.033 7 6.51 1.64 010726 1 0.258 0.010 0.025 6 8.38 0.00 010727 1 0.315 0.013 0.036 8 8.32 0.00 010728 1 0.179 0.007 0.020 8 8.34 0.00 010729 1 0.096 0.002 0.008 10 8.05 0.00 010730 1 0.109 0.002 0.006 7 8.43 0.00 010731 1 0.108 0.008 0.022 7 8.45 0.00 010801 1 0.207 0.014 0.037 7 8.48 0.00 010802 1 0.149 0.006 0.019 9 8.26 0.00 010803 1 0.090 0.008 0.025 9 8.43 0.00 010804 1 0.092 0.003 0.008 10 8.40 0.00 010805 1 0.325: 0.019 0.045 6 3.85 4.59 010806 1 0.476: 0.051 0.101 4 4.96 3.50 010807 1 0.372: 0.014 0.039 8 3.18 5.32 010808 1 0.376 0.006 0.018 9 7.86 0.60 010809 1 0.295 0.006 0.019 10 8.03 0.34 010810 1 0.197 0.004 0.014 11 8.51 0.00 010811 1 0.100 0.006 0.021 12 8.49 0.00 010812 1 0.096 0.006 0.020 11 8.56 0.00 010813 1 0.117 0.006 0.017 8 5.30 0.00 010814 1 0.101 0.006 0.018 10 5.39 0.00 010815 1 0.191 0.005 0.015 8 5.50 0.00 010816 1 0.118 0.007 0.024 11 8.54 0.00 010817 1 0.093 0.010 0.027 7 5.71 0.00 010818 1 0.104 0.007 0.020 7 5.86 0.00 010819 1 0.096 0.009 0.024 7 8.99 0.00 010820 1 0.100 0.008 0.017 5 4.13 0.00 010821 1 0.102 0.012 0.032 7 4.24 0.00 010822 1 0.083 0.007 0.018 6 4.32 0.00 010823 1 0.100 0.003 0.007 5 9.20 0.00 010824 1 0.118 0.008 0.021 7 9.13 0.00 010825 1 0.110 0.005 0.016 9 8.87 0.00 010826 1 0.107 0.004 0.010 6 8.91 0.29 010827 1 0.096 0.004 0.013 10 8.96 0.00 010828 1 0.120 0.011 0.032 8 9.21 0.00 010829 1 0.121 0.006 0.010 3 5.33 4.01 010830 1 0.097 0.004 0.010 5 9.41 0.00 010831 1 0.191: 0.032 0.064 4 7.00 2.40 010901 1 0.100 0.013 0.029 5 9.47 0.00 010902 0 0.00 0.03 High humidity 010903 1 0.298: 0.053 0.092 3 1.74 4.46 010904 1 0.086 0.013 0.035 7 6.76 2.53 010905 1 0.095 0.007 0.012 3 4.16 0.46 010906 1 0.086 0.009 0.021 6 4.83 0.00 010907 1 0.080 0.017 0.044 7 4.49 0.00 010908 1 0.084 0.007 0.017 7 9.45 0.00 010909 0 0.00 9.67 Cloudy 010910 1 0.33 8.24 Rain and cloud 010911 1 0.210: 0.009 0.013 2 2.96 6.77 Warning - 2 frames 010912 0 0.00 9.57 Tech. problem 010913 1 0.126: 0.023 0.045 4 4.58 5.21 010914 1 0.098 0.018 0.043 6 7.44 0.10 010915 1 0.099 0.005 0.010 4 7.21 0.00 010916 1 0.137: 0.026 0.064 6 8.53 1.11 010917 1 0.114 0.009 0.023 6 9.91 0.00 010918 1 0.140 0.006 0.017 7 9.89 0.00 010919 0 0.00 0.00 Rain 010920 0 0.00 0.00 Rain 010921 0 0.00 3.94 High humidity 010922 0 0.00 0.00 High humidity 010923 0 0.00 0.00 Rain 010924 0 0.00 0.00 Rain 010925 0 0.00 0.00 Tech. problem 010926 0 0.00 3.74 010927 0 0.00 0.00 Rain 010928 0 0.00 6.02 Tech. problem 010929 0 0.00 4.32 Tech. problem 010930 0 0.00 0.00 Tech. problem 011001 0 0.00 0.00 Tech. problem 011002 0 0.00 0.00 Tech. problem 011003 0 0.00 0.00 Tech. problem 011004 0 0.00 0.00 Tech. problem 011005 0 0.00 0.00 Tech. problem 011006 0 0.00 0.00 Tech. problem 011007 0 0.00 0.00 Tech. problem 011008 0 0.00 0.00 Tech. problem 011009 0 0.00 0.00 Tech. problem 011010 0 0.00 0.00 Tech. problem 011011 0 0.00 0.00 Tech. problem 011012 0 0.00 0.00 Tech. problem 011013 0 0.00 0.00 Tech. problem 011014 0 0.00 0.00 Tech. problem 011015 0 0.00 0.00 Tech. problem 011016 0 0.00 10.18 Telescope service 011017 0 0.00 10.24 Tech. problem 011018 1 0.125 0.006 0.023 13 10.30 0.00 011019 1 0.131 0.006 0.021 15 10.12 0.05 011020 1 0.113 0.007 0.026 13 9.91 0.40 011021 1 0.445: 0.058 0.101 3 1.00 9.53 011022 1 0.123 0.006 0.020 10 5.30 0.35 011023 1 0.181 0.015 0.049 11 10.14 0.31 011024 0 0.00 10.85 Cloud 011025 2 2.76 7.90 Cloud 011026 1 0.191 0.012 0.027 5 6.80 4.07 011027 1 0.170 0.007 0.012 3 6.18 4.73 011028 1 0.130 0.008 0.024 8 10.92 0.00 011029 1 0.123 0.005 0.014 7 6.27 3.23 011030 1 0.137 0.019 0.047 6 7.25 0.90 High humidity 011031 0 0.00 0.00 Rain 011101 0 0.00 5.58 Some cloud 011102 2 3.25 7.44 Some cloud 011103 0 0.00 6.92 Cloud+rain 011104 0 0.00 0.00 Cloud+rain 011105 1 0.29 10.43 Cloud+rain 011106 0 0.00 9.88 Cloud+rain 011107 0 0.00 0.00 Cloud+rain 011108 1 0.12 0.39 Cloud+rain 011109 0 0.00 3.91 Cloud+rain 011110 0 0.00 4.20 Cloud+rain 011111 0 0.00 0.00 Cloud+rain 011112 1 0.04 0.16 Cloud+rain 011113 1 0.107 0.007 0.018 6 6.10 0.12 Some rain/high humidity 011114 0 0.00 4.67 Some rain/high humidity 011115 1 0.107 0.019 0.049 7 7.05 1.06 Some rain/high humidity 011116 1 0.121: 0.046 0.102 5 3.35 4.72 High humidity at end 011117 0 0.00 1.86 Cloud + rain 011118 1 0.108 0.007 0.021 10 4.94 2.86 Some rain/high humidity 011119 1 0.41 0.00 Mostly rain 011120 0 0.00 0.00 Rain/high humidity 011121 1 0.112: 0.007 0.010 2 4.58 0.37 Some rain/high humidity 011122 0 0.00 0.39 Rain 011123 0 0.00 0.00 Rain 011124 0 0.00 0.00 Rain 011125 1 0.097 0.004 0.010 6 3.16 0.40 Some rain 011126 1 0.097 0.002 0.007 10 6.76 0.06 011127 1 0.093 0.007 0.021 10 7.18 0.16 011128 1 0.101 0.004 0.016 13 10.20 1.46 011129 1 0.094 0.005 0.020 13 10.30 0.00 011130 0 0.00 0.00 High humidity 011201 1 0.116: 0.006 0.013 5 2.81 8.18 011202 0 0.00 0.00 High humidity and rain 011203 1 0.117 0.008 0.026 10 7.67 1.57 011204 0 0.00 8.90 Cloudy 011205 1 0.110: 0.023 0.071 10 5.52 5.83 011206 1 0.108 0.006 0.017 8 10.64 0.84 011207 1 0.241: 0.015 0.026 3 2.73 8.53 Some cloud 011208 0 0.00 0.81 Rain/high humidity 011209 1 0.101 0.008 0.014 3 1.55 0.00 Rain/high humidity 011210 2 1.18 0.37 Mostly rain/high humidity 011211 1 0.108 0.014 0.028 4 6.97 0.00 High humidity at start 011212 1 0.104 0.018 0.047 7 7.36 4.08 011213 0 0.00 0.00 Rain/high humidity 011214 0 0.00 0.00 Rain/high humidity 011215 0 0.00 0.04 Rain/high humidity 011216 0 0.00 0.00 Compressor problems 011217 1 0.43 0.33 High humidity/rain 011218 1 0.118 0.020 0.056 8 11.23 0.21 011219 0 0.00 6.82 Mostly high humidity 011220 1 1.20 0.28 Mostly high humidity 011221 0 0.00 0.00 High humidity/rain 011222 0 0.00 0.00 High humidity/rain 011223 0 0.00 0.00 High humidity/rain 011224 1 0.116 0.022 0.054 6 8.53 0.70 High humidity at start 011225 0 0.00 8.00 Some high humidity 011226 1 0.106 0.011 0.032 9 9.22 2.14 011227 1 0.158: 0.019 0.071 14 10.14 1.07 011228 1 0.29 7.77 Some high humidity 011229 0 0.00 0.98 Mostly high humidity 011230 0 0.00 0.00 High humidity and rain 011231 0 0.00 0.00 High humidity and rain 010108 0 0.00 0.00