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This article has an erratum: [https://doi.org/10.1051/0004-6361/201526027e]


Table 7

Colour evolution of the 2014 eruption of M31N 2008-12a.

Date ttmax JD 2 456 000.5+ Telescope and Filters Colour
(UT) (days) start end instrument

2014 Oct. 3.543 –0.158 933.536 933.549 Kiso 1.05 m (BV) 0.29 ± 0.17
2014 Oct. 3.819 0.119 933.815 933.822 Ondřejov 0.65 m (BV) 0.2 ± 0.2
2014 Oct. 3.880 0.180 933.875 933.885 LT IO:O (BV) 0.122 ± 0.022
2014 Oct. 3.926 0.226 933.921 933.931 LT IO:O (BV) 0.123 ± 0.020
2014 Oct. 3.983 0.283 933.978 933.988 LT IO:O (BV) 0.140 ± 0.020
2014 Oct. 4.041 0.341 934.036 934.046 LT IO:O (BV) 0.138 ± 0.020
2014 Oct. 4.086 0.386 934.081 934.091 LT IO:O (BV) 0.145 ± 0.018
2014 Oct. 4.135 0.436 934.131 934.140 LT IO:O (BV) 0.146 ± 0.019
2014 Oct. 4.168 0.468 934.157 934.178 MLO 1.0 m (BV) 0.17 ± 0.06
2014 Oct. 4.183 0.484 934.179 934.188 LT IO:O (BV) 0.185 ± 0.019
2014 Oct. 4.900 1.200 934.896 934.905 LT IO:O (BV) 0.014 ± 0.040
2014 Oct. 4.946 1.246 934.941 934.950 LT IO:O (BV) 0.097 ± 0.040
2014 Oct. 5.015 1.315 935.010 935.020 LT IO:O (BV) 0.095 ± 0.043
2014 Oct. 5.092 1.393 935.088 935.097 LT IO:O (BV) 0.158 ± 0.041
2014 Oct. 5.166 1.466 935.161 935.171 LT IO:O (BV) 0.055 ± 0.035
2014 Oct. 5.878 2.178 935.871 935.885 LT IO:O (BV) −0.227 ± 0.137
2014 Oct. 5.952 2.252 935.940 935.963 LT IO:O (BV) −0.111 ± 0.075
2014 Oct. 6.026 2.326 936.015 936.037 LT IO:O (BV) −0.275 ± 0.081
2014 Oct. 6.101 2.401 936.090 936.112 LT IO:O (BV) −0.144 ± 0.085
2014 Oct. 6.174 2.474 936.163 936.185 LT IO:O (BV) −0.153 ± 0.109
2014 Oct. 6.881 3.181 936.870 936.892 LT IO:O (BV) 0.174 ± 0.125
2014 Oct. 7.022 3.322 937.011 937.033 LT IO:O (BV) −0.074 ± 0.080
2014 Oct. 7.187 3.487 937.176 937.198 LT IO:O (BV) −0.237 ± 0.110
2014 Oct. 9.829 6.129 939.818 939.840 LT IO:O (BV) 0.079 ± 0.147

2014 Oct. 3.885 0.185 933.880 933.890 LT IO:O (Vr′) 0.126 ± 0.019
2014 Oct. 3.931 0.231 933.926 933.936 LT IO:O (Vr′) 0.086 ± 0.017
2014 Oct. 3.988 0.288 933.983 933.993 LT IO:O (Vr′) 0.101 ± 0.017
2014 Oct. 4.046 0.346 934.041 934.051 LT IO:O (Vr′) 0.145 ± 0.017
2014 Oct. 4.091 0.391 934.086 934.096 LT IO:O (Vr′) 0.145 ± 0.017
2014 Oct. 4.140 0.440 934.136 934.145 LT IO:O (Vr′) 0.173 ± 0.016
2014 Oct. 4.188 0.489 934.184 934.193 LT IO:O (Vr′) 0.194 ± 0.017
2014 Oct. 4.905 1.205 934.901 934.910 LT IO:O (Vr′) 0.391 ± 0.034
2014 Oct. 4.951 1.251 934.946 934.955 LT IO:O (Vr′) 0.441 ± 0.033
2014 Oct. 5.020 1.320 935.015 935.025 LT IO:O (Vr′) 0.366 ± 0.038
2014 Oct. 5.097 1.398 935.093 935.102 LT IO:O (Vr′) 0.310 ± 0.037
2014 Oct. 5.171 1.471 935.166 935.176 LT IO:O (Vr′) 0.429 ± 0.032
2014 Oct. 5.885 2.185 935.878 935.892 LT IO:O (Vr′) 0.662 ± 0.113
2014 Oct. 5.963 2.263 935.952 935.974 LT IO:O (Vr′) 0.513 ± 0.074
2014 Oct. 6.037 2.337 936.026 936.048 LT IO:O (Vr′) 0.619 ± 0.077
2014 Oct. 6.112 2.412 936.101 936.123 LT IO:O (Vr′) 0.463 ± 0.081
2014 Oct. 6.185 2.485 936.174 936.196 LT IO:O (Vr′) 0.441 ± 0.099
2014 Oct. 6.892 3.192 936.881 936.903 LT IO:O (Vr′) 0.295 ± 0.091
2014 Oct. 7.033 3.333 937.022 937.044 LT IO:O (Vr′) 0.253 ± 0.095
2014 Oct. 7.198 3.498 937.187 937.209 LT IO:O (Vr′) 0.460 ± 0.121
2014 Oct. 8.841 5.141 938.830 938.852 LT IO:O (Vr′) 0.057 ± 0.287
2014 Oct. 9.840 6.140 939.829 939.851 LT IO:O (Vr′) −0.041 ± 0.123

2014 Oct. 3.890 0.190 933.885 933.895 LT IO:O (r′ − i′) −0.147 ± 0.023
2014 Oct. 3.936 0.236 933.931 933.941 LT IO:O (r′ − i′) −0.103 ± 0.018
2014 Oct. 3.993 0.293 933.988 933.998 LT IO:O (r′ − i′) −0.116 ± 0.019
2014 Oct. 4.051 0.351 934.046 934.056 LT IO:O (r′ − i′) −0.100 ± 0.019
2014 Oct. 4.096 0.396 934.091 934.101 LT IO:O (r′ − i′) −0.103 ± 0.018
2014 Oct. 4.145 0.445 934.141 934.150 LT IO:O (r′ − i′) −0.097 ± 0.017
2014 Oct. 4.193 0.494 934.189 934.198 LT IO:O (r′ − i′) −0.045 ± 0.019
2014 Oct. 4.910 1.210 934.905 934.915 LT IO:O (r′ − i′) 0.010 ± 0.032
2014 Oct. 4.956 1.256 934.951 934.960 LT IO:O (r′ − i′) −0.036 ± 0.035
2014 Oct. 5.025 1.325 935.020 935.030 LT IO:O (r′ − i′) 0.042 ± 0.034
2014 Oct. 5.102 1.403 935.098 935.107 LT IO:O (r′ − i′) 0.049 ± 0.036
2014 Oct. 5.176 1.476 935.171 935.181 LT IO:O (r′ − i′) −0.002 ± 0.037
2014 Oct. 5.892 2.192 935.885 935.899 LT IO:O (r′ − i′) −0.095 ± 0.091
2014 Oct. 5.974 2.274 935.963 935.985 LT IO:O (r′ − i′) −0.043 ± 0.078
2014 Oct. 6.048 2.348 936.037 936.059 LT IO:O (r′ − i′) −0.113 ± 0.078
2014 Oct. 6.123 2.424 936.112 936.135 LT IO:O (r′ − i′) −0.104 ± 0.080
2014 Oct. 6.196 2.496 936.185 936.207 LT IO:O (r′ − i′) −0.074 ± 0.092
2014 Oct. 6.903 3.203 936.892 936.914 LT IO:O (r′ − i′) −0.232 ± 0.088
2014 Oct. 7.044 3.344 937.033 937.055 LT IO:O (r′ − i′) −0.153 ± 0.126
2014 Oct. 7.209 3.509 937.198 937.220 LT IO:O (r′ − i′) −0.246 ± 0.155
2014 Oct. 7.959 4.259 937.948 937.970 LT IO:O (r′ − i′) −0.471 ± 0.238
2014 Oct. 9.851 6.151 939.840 939.862 LT IO:O (r′ − i′) −0.209 ± 0.207
2014 Oct. 10.081 6.381 940.070 940.092 LT IO:O (r′ − i′) 1.280 ± 0.222

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