Large-amplitude modulations and hours-timescale variability in the early X-ray light curve of a tidal disruption flare

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Volume 708 (April 2026)

A&A, 708 (2026) A163

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Table E.1.

X-ray spectral fit results for the best-fitting models shown in Figs. D.2 and D.3.

Phase	ObsID	`zpowerlaw`		`ztbabs*zpowerlaw`			`zbbody+zbbody`

		AIC	Γ	AIC	log N_H	Γ	AIC	kT_BB1	kT_BB2	log A₁	log A₂	log A₁/A₂
[d]					[cm⁻²]			[eV]	[eV]
10	eRASS2	464	$4 . 50_{- 0.09}^{+ 0.09}$ $Mathematical equation: $ 4.50^{+0.09}_{-0.09} $$	460	$20 . 06_{- 0.46}^{+ 0.19}$ $Mathematical equation: $ 20.06^{+0.19}_{-0.46} $$	$4 . 8_{- 0.2}^{+ 0.2}$ $Mathematical equation: $ 4.8^{+0.2}_{-0.2} $$	454	$43_{- 4}^{+ 5}$ $Mathematical equation: $ 43^{+5}_{-4} $$	$113_{- 6}^{+ 8}$ $Mathematical equation: $ 113^{+8}_{-6} $$	$- 2 . 94_{- 0.10}^{+ 0.11}$ $Mathematical equation: $ -2.94^{+0.11}_{-0.10} $$	$- 3 . 80_{- 0.10}^{+ 0.07}$ $Mathematical equation: $ -3.80^{+0.07}_{-0.10} $$	$0 . 88_{- 0.09}^{+ 0.09}$ $Mathematical equation: $ 0.88^{+0.09}_{-0.09} $$
36	XMM1	3217	$4 . 98_{- 0.02}^{+ 0.02}$ $Mathematical equation: $ 4.98^{+0.02}_{-0.02} $$	2884	$20 . 57_{- 0.03}^{+ 0.03}$ $Mathematical equation: $ 20.57^{+0.03}_{-0.03} $$	$5 . 9_{- 0.1}^{+ 0.1}$ $Mathematical equation: $ 5.9^{+0.1}_{-0.1} $$	2811	$51_{- 2}^{+ 1}$ $Mathematical equation: $ 51^{+1}_{-2} $$	$106_{- 3}^{+ 3}$ $Mathematical equation: $ 106^{+3}_{-3} $$	$- 3 . 30_{- 0.02}^{+ 0.02}$ $Mathematical equation: $ -3.30^{+0.02}_{-0.02} $$	$- 4 . 17_{- 0.05}^{+ 0.05}$ $Mathematical equation: $ -4.17^{+0.05}_{-0.05} $$	$0 . 87_{- 0.04}^{+ 0.04}$ $Mathematical equation: $ 0.87^{+0.04}_{-0.04} $$
192	eRASS3	464	$5 . 36_{- 0.24}^{+ 0.27}$ $Mathematical equation: $ 5.36^{+0.27}_{-0.24} $$	465	$19 . 23_{- 0.83}^{+ 0.79}$ $Mathematical equation: $ 19.23^{+0.79}_{-0.83} $$	$5 . 5_{- 0.3}^{+ 0.4}$ $Mathematical equation: $ 5.5^{+0.4}_{-0.3} $$	469	$50_{- 4}^{+ 4}$ $Mathematical equation: $ 50^{+4}_{-4} $$	$232_{- 69}^{+ 77}$ $Mathematical equation: $ 232^{+77}_{-69} $$	$- 3 . 70_{- 0.09}^{+ 0.10}$ $Mathematical equation: $ -3.70^{+0.10}_{-0.09} $$	$- 5 . 60_{- 0.25}^{+ 0.24}$ $Mathematical equation: $ -5.60^{+0.24}_{-0.25} $$	$1 . 89_{- 0.21}^{+ 0.21}$ $Mathematical equation: $ 1.89^{+0.21}_{-0.21} $$
196	XMM2	5385	$5 . 39_{- 0.03}^{+ 0.03}$ $Mathematical equation: $ 5.39^{+0.03}_{-0.03} $$	5362	$19 . 97_{- 0.11}^{+ 0.08}$ $Mathematical equation: $ 19.97^{+0.08}_{-0.11} $$	$5 . 7_{- 0.1}^{+ 0.1}$ $Mathematical equation: $ 5.7^{+0.1}_{-0.1} $$	5480	$49_{- 1}^{+ 1}$ $Mathematical equation: $ 49^{+1}_{-1} $$	$127_{- 5}^{+ 5}$ $Mathematical equation: $ 127^{+5}_{-5} $$	$- 3 . 74_{- 0.02}^{+ 0.02}$ $Mathematical equation: $ -3.74^{+0.02}_{-0.02} $$	$- 5 . 18_{- 0.05}^{+ 0.06}$ $Mathematical equation: $ -5.18^{+0.06}_{-0.05} $$	$1 . 44_{- 0.05}^{+ 0.04}$ $Mathematical equation: $ 1.44^{+0.04}_{-0.05} $$
378	eRASS4	429	$6 . 31_{- 0.88}^{+ 0.95}$ $Mathematical equation: $ 6.31^{+0.95}_{-0.88} $$	431	$19 . 21_{- 0.83}^{+ 0.81}$ $Mathematical equation: $ 19.21^{+0.81}_{-0.83} $$	$6 . 5_{- 0.9}^{+ 0.9}$ $Mathematical equation: $ 6.5^{+0.9}_{-0.9} $$	431	$39_{- 8}^{+ 8}$ $Mathematical equation: $ 39^{+8}_{-8} $$	$217_{- 108}^{+ 83}$ $Mathematical equation: $ 217^{+83}_{-108} $$	$- 4 . 29_{- 0.33}^{+ 0.43}$ $Mathematical equation: $ -4.29^{+0.43}_{-0.33} $$	$- 6 . 44_{- 0.52}^{+ 0.42}$ $Mathematical equation: $ -6.44^{+0.42}_{-0.52} $$	$2 . 25_{- 0.50}^{+ 0.44}$ $Mathematical equation: $ 2.25^{+0.44}_{-0.50} $$
393	XMM3	5667	$5 . 66_{- 0.09}^{+ 0.09}$ $Mathematical equation: $ 5.66^{+0.09}_{-0.09} $$	5669	$18 . 47_{- 0.33}^{+ 0.43}$ $Mathematical equation: $ 18.47^{+0.43}_{-0.33} $$	$5 . 7_{- 0.1}^{+ 0.1}$ $Mathematical equation: $ 5.7^{+0.1}_{-0.1} $$	5647	$40_{- 1}^{+ 1}$ $Mathematical equation: $ 40^{+1}_{-1} $$	$140_{- 9}^{+ 11}$ $Mathematical equation: $ 140^{+11}_{-9} $$	$- 4 . 41_{- 0.06}^{+ 0.06}$ $Mathematical equation: $ -4.41^{+0.06}_{-0.06} $$	$- 6 . 16_{- 0.07}^{+ 0.07}$ $Mathematical equation: $ -6.16^{+0.07}_{-0.07} $$	$1 . 75_{- 0.05}^{+ 0.05}$ $Mathematical equation: $ 1.75^{+0.05}_{-0.05} $$

Notes. The Akaike information criterion (AIC) provides the goodness of fit. log A₁ and log A₂ are the normalisation of the softer (BB1) and harder (BB2) blackbody components for the zbbody+zbbody model. log(A₁/A₂) represents the spectral hardness.

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