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Table 3

Spectral results from the power-law (PL) fit to the measured Swift/XRT spectra.

MJD Obs Mode PL Index χ2/#d.o.f.

54 913.1 WT 246/214
54 914.2 WT 246/206
54 915.2 WT 200/168
54 918.2 WT 130/133
54 923.1 WT 160/166
54 929.1 WT 179/189
54 935.0 WT 88/75
54 941.1 WT 111/113
54 946.1 WT 139/159
54 951.0 WT 62/64
54 952.8 PC 56/58
54 953.4 PC 57/56
54 953.7 PC 66/59
54 954.4 WT 84/78
54 954.7 WT 165/166
54 955.4 WT 100/126
54 957.1 WT 163/167
54 962.0 WT 125/108
54 963.4 WT 79/75
54 963.9 WT 140/129
54 964.4 WT 141/155
54 965.1 WT 269/241
MJD Obs Mode PL Index χ2/#d.o.f.

54 966.0 WT 180/183
54 970.2 WT 200/199
54 976.3 WT 271/244
54 976.9 WT 201/184
54 977.3 WT 171/139
54 977.6 WT 178/162
54 977.7 WT 245/164
54 978.0 WT 424/317
54 979.0 WT 359/298
54 980.1 WT 497/345
54 989.9 WT 303/287
54 995.9 WT 197/196
55 001.0 WT 14/21
55 006.0 WT 152/159
55 010.3 WT 331/295
55 015.9 WT 147/158
55 020.9 WT 180/175
55 027.6 WT 377/292
55 029.9 WT 144/101
55 035.2 WT 89/70
55 040.8 WT 101/107
55 043.0 WT 109/102

Notes. For all spectra where the PL fit does not deliver a satisfactory result (fit probability P< 0.3% (3σ)), additional results from a log-parabola fit are quoted in the following: MJD 54 977.7: , , χ2/d.o.f. = 214/163; MJD 54978.0: , , χ2/d.o.f. = 335/316; MJD 54 980.1: , , χ2/d.o.f. = 373/344; MJD 55 027.6: , , χ2/d.o.f. = 293/291.

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