Rapid and multiband variability of the TeV bright active nucleus of the galaxy IC 310

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Table 4

Results of the X-ray observations analyzed.

Instrument	Date	Exposure	F _0.5−2 keV ^a	F _2−10 keV ^b	Γ ^c	N _H ^d	χ²/d.o.f.
	[MJD]	[ks]	[10^-3 keV s^-1 cm^-2]	[10^-3 keV s^-1 cm^-2]		[10²² cm^-2]

XMM-Newton	52 697	22.6	1.007 ± 0.012	0.828	2.55	0.146	124/104
Chandra ObsID 5596	53 456	1.5	1.77 ± 0.13	2.5 ± 0.4	2.01 ± 0.20	0.07	62/78
Chandra ObsID 5597	53 363	25.2	0.656 ± 0.019	1.39 ± 0.08	1.76 ± 0.07	0.089	97/78
Swift-XRT	54 152	4.1	0.82 ± 0.10	1.2	2.0	0.07	12/16

Notes.

^(a)

Measured flux between 0.5 and 2 keV determined by a simple power-law fit.

^(b)

Measured flux between 2 and 10 keV determined by a simple power-law fit.

^(c)

Photon index: F ∝ E^−Γ.

^(d)

Absorption with an equivalent column of hydrogen.

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