XMMSL1 J074008.2-853927: a tidal disruption event with thermal and non-thermal components

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Table 2

Spectral fits to XMM-Newton pointed observations of XMMSL1 J0740-85.

Power-law^a		Power-law^b	Bbody^c	Brem^d	Reflection^e		zxipcf ^f			C/d.o.f. ^g
Γ	Norm	Γ	kT	kT	Norm	xi	N _H	xi	cf
	keV^-1 cm^-2 s^-1		eV	eV	× 10^-8	erg cm/s	10²² cm^-2	log	%

XMM-Newton observation 1 − 2014-04-30 (XMM1)

4.61 ± 0.08	1.26 ± + 0.08 × 10^-4	1.43 ± 0.09								516/397
1.94 ± 0.06	1.13 ± 0.05 × 10^-4		86 ± 2							415/397
1.82 ± 0.06	0.98 ± 0.06 × 10^-4			170 ± 5						416/397
1.48 ± 0.06	5.8 ± 0.4 × 10^-5									664/396
3.31 ± 0.04	1.72 ± 0.21 × 10^-3							1.95 ± 0.02	92 ± 1	460/396
2.45 ± 0.20										383/394

XMM-Newton observation 2 − 2015-01-12 (XMM2)

		1.97 ± 0.21								115/105
2.38 ± 0.11			85 ± 7							122/105
2.28 ± 0.13				177 ± 24						116/105
3.07 ± 0.06										122/104
2.79 ± 0.24										116/102

Notes. All fits include absorption by the Galactic column (model TBABS, N_H = 1.5 × 10²¹ cm^-2, abundances from Wilms et al. 2000). Errors are 90% confidence.

^(a)

Continuum power-law with photon index and normalisation,

^(b)

slope of secondary power-law modelling high-energy emission,

^(c)

black-body model temperature,

^(d)

bremsstrahlung model temperature,

^(e)

ionized reflection (reflionx; Ross & Fabian 2005) with ionization state and normalisation, convolved with a relativistic blurring model (kdblur; Laor 1991; Fabian et al. 2002), with fixed emissivity index = 3, inner radius = 4.5 GM/c², outer radius = 100 GM/c² and inclination = 45 °,

^(f)

ionized absorption (zxipcf; Reeves et al. 2008) with equivalent column density, ionization state and covering fraction,

^(g)

C-statistic/number of degrees of freedom.

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