Hard X-ray spectral variability of the brightest Seyfert AGN in the Swift/BAT sample

Free Access

Table 2

The models.

Name	Model A		Model B
		χ² /(d.o.f.)	β	α	χ²/(d.o.f.)


NGC 4151	0.40	215/97	0.005 ± 0.012	0.391 ± 0.003	212/96
NGC 4945	0.52	188/91	−0.07 ± 0.03	0.461 ± 0.011	124/90
NGC 2110	0.44	115/97	−0.014 ± 0.023	0.419 ± 0.008	106/96
IC 4329	0.31	129/90	−0.09 ± 0.05	0.303 ± 0.007	121/89
NGC 4388	0.43	174/92	−0.13 ± 0.03	0.418 ± 0.008	136/91

Notes. Best-fit parameter values, χ² values and number of degrees of freedom of model A to the HR-time curves (second and third columns), and of model B ^a to the hardness-flux plots (see text for details).

^(a)

HR = α + β × (20–100 keV flux).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.