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Table 2

Averaged spectral slopes and the associated errors for the different observing runs, evaluated in five different ranges: S1 in the 0.45–0.55 μm range, S2 in the 0.55–2.50 μm range, S3 in the 0.55–0.86 μm range, S4 in the 1.08–1.70 μm range, and S5 in the 1.7–2.5 μm range.

Day α S1 errS1 S2 errS2 S3 errS3 S4 errS4 S5 errS5
(°) (μm−1) (μm−1) (μm−1) (μm−1) (μm−1) (μm−1) (μm−1) (μm−1) (μm−1) (μm−1)
9 Dec. 2018 91.75 −0.0040 0.0025 −0.0174 0.0007 −0.0368 0.0042 −0.0077 0.0007 −0.0091 0.0007
12 Dec. 2018 46.57 −0.0988 0.0030 −0.0372 0.0004 −0.0959 0.0009 −0.0285 0.0005 0.0169 0.0004
13 Dec. 2018 44.64 −0.0273 0.0010 −0.0428 0.0003 −0.0957 0.0010 −0.0386 0.0004 0.0471 0.0004
16 Dec. 2018 90.83 −0.0187 0.0023 −0.0159 0.0008 −0.0680 0.0058 −0.0080 0.0009 −0.0073 0.0008
21 March 2019 30.38 −0.0665 0.0005 −0.0408 0.0001 −0.0876 0.0004 −0.0204 0.0001 −0.0078 0.0001
25 Apr. 2019 45.00 −0.0630 0.0008 −0.0385 0.0002 −0.0789 0.0014 −0.0113 0.0002 −0.0169 0.0002
3 May 2019 130.61 0.1574 0.073 0.0902 0.0030 0.2118 0.0075 0.0392 0.0020 0.0411 0.0010
9 May 2019 8.25 −0.0980 0.0005 −0.0434 0.0002 −0.1114 0.0004 −0.0209 0.0002 −0.0149 0.0002
11 May 2019 58.28 −0.0695 0.0013 −0.02792 0.0002 −0.05175 0.0015 −0.0094 0.0004 −0.0171 0.0003
16 May 2019 29.88 −0.0986 0.0006 −0.0343 0.0002 −0.0866 0.0007 −0.0165 0.0002 −0.0150 0.0002
23 May 2019 91.72 −0.0091 0.0035 −0.0118 0.0080 −0.0168 0.0066 −0.0056 0.0008 −0.0164 0.0008
26 May 2019 83.06 −0.0495 0.0012 −0.0089 0.0003 −0.0009 0.0031 −0.0051 0.0003 −0.0145 0.0003
31 May 2019 129.83 0.1517 0.0048 0.0908 0.0008 0.1919 0.0040 0.0548 0.0012 0.0132 0.0012
6 June 2019 92.47 −0.0337 0.0040 −0.0169 0.0015 −0.0166 0.0111 0.0080 0.0015 −0.0423 0.0014
26 Sept. 2019 8.69 −0.1483 0.0005 −0.0323 0.0002 −0.1204 0.0002 −0.0186 0.0002 −0.0100 0.0001
5 Oct. 2019 37.62 −0.1447 0.0011 −0.0054 0.0004 −0.0542 0.0014 −0.0030 0.0004 0.0082 0.0003
12 Oct. 2019 38.41 −0.1198 0.0010 −0.0205 0.0003 −0.0654 0.0011 −0.0091 0.0003 −0.0043 0.0002
19 Oct. 2019 41.59 −0.1441 0.0008 −0.0141 0.0003 −0.0622 0.0008 −0.0064 0.0003 0.0008 0.0002
26 Oct. 2019 34.32 −0.1117 0.0001 −0.0232 0.0003 −0.0754 0.0012 −0.0106 0.0003 −0.0053 0.0002
21 Jan. 2020 75.63 −0.0731 0.0012 −0.0013 0.0003 −0.0264 0.0016 0.0006 0.0004 0.0232 0.0003
11 Feb. 2020 27.05 −0.0027 0.0019 −0.0418 0.0004 −0.0583 0.0007 −0.0197 0.0003 0.0089 0.0004

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